JP2018027000A - Controller-integrated rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller-integrated rotary electric machine capable of suppressing current concentration with a power module during battery reverse connection.SOLUTION: The controller-integrated rotary electric machine includes: a rotary electric machine; a controller having a control circuit for controlling a rotary electric machine, a plurality of switching element modules arranged around a rotating shaft of the rotary electric machine and each being controlled by the control circuit and bus bars for connecting power terminals of the switching element modules with external connection terminal members. The bus bars include a counterclockwise bus bar part and a clockwise bus bar part which direct toward the rotating shaft of the rotary electric machine from the side of a connection to the external connection terminal member, extend to each of the right and left around the rotating shaft and which are connected with each of the power terminals of the plurality of switching element modules.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a controller-integrated rotating electrical machine that integrally includes a rotating electrical machine and a control device.

  2. Description of the Related Art Conventionally, a control device-integrated rotating electrical machine that integrally includes a rotating electrical machine and a control device is known (for example, Patent Document 1). In the control device-integrated rotating electrical machine, the control device includes a power module, a heat sink, an external connection terminal member, a bus bar, and a case member. A plurality of power modules are arranged around the rotating shaft of the rotating electrical machine. Each power module is bonded to the heat sink via an adhesive having thermal conductivity and insulating properties.

  The bus bar has an inner wall portion, an outer wall portion, and a flat wall portion, and is insert-molded in a case member as an insulator. A power supply terminal of each power module is connected to a single external connection terminal member via a bus bar. The case member is bonded to the heat sink via an adhesive. The power module is housed in a recess formed by a case member and a heat sink. In addition, an insulating member having an insulating property is injected into a recess formed by the case member and the heat sink.

Japanese Patent No. 5558534

  The path length from the negative power supply terminal of the power module to the external connection terminal member via the positive power supply terminal is different for each power module. The shorter the path length, the smaller the path impedance, and the longer the path length, the greater the path impedance. By the way, the positive electrode terminal and negative electrode terminal of the battery used for the controller-integrated rotating electrical machine may be connected in reverse from the regular ones. When the battery is reversely connected, the smaller the above-described path impedance, the easier the current is concentrated on the upper and lower arms in the power module, and the switching element is more likely to fail due to heat generation. The current return diode connected in parallel to the switching element generally has a negative temperature characteristic in which the forward voltage VF decreases as the temperature increases. For this reason, when the temperature rises due to current concentration in the power module, there is a problem that the forward voltage VF further decreases and further current concentration occurs.

  In the control device-integrated rotating electrical machine described in Patent Document 1 described above, the bus bar extends in an annular shape only from one side around the rotating shaft of the rotating electrical machine from the connection portion side to the external connection terminal member, and a plurality of power modules The external connection terminal member is unbalanced around the rotation axis of the rotating electrical machine. For this reason, in such a rotating electrical machine, each power module is likely to concentrate current one by one in order, so that failure tends to occur.

  The present invention has been made in view of such a point, and an object thereof is to provide a controller-integrated rotating electrical machine capable of suppressing current concentration in a power module when a battery is reversely connected.

  The invention according to claim 1, which has been made to solve the above problems, includes a rotating electrical machine, a control circuit that controls the rotating electrical machine, and a plurality of the control circuits that are arranged around the rotation axis of the rotating electrical machine. A control device-integrated dynamoelectric machine comprising: a controlled switching element module; and a control device having a bus bar for connecting a power supply terminal of the switching element module to an external connection terminal member, wherein the external connection terminal member is The bus bar is disposed in the non-arrangement region, and the bus bar extends from the connecting portion side with the external connection terminal member toward the rotation axis to the left and right around the rotation axis. Control device-integrated rotation having a counterclockwise busbar portion and a clockwise busbar portion connected to the power supply terminal of the switching element module It is a machine.

  According to this configuration, the bus bar extends counterclockwise from the connection portion side with the external connection terminal member with respect to the rotation axis and is connected to the power supply terminals of the plurality of switching element modules, and the external connection terminal member And a clockwise busbar portion extending clockwise from the connecting portion side to the rotation axis and connected to the power supply terminals of the plurality of switching element modules, so that externally connected from the power supply terminal of each switching element module via the busbar It is possible to shorten the longest path length among the path lengths leading to the connection terminal member, that is, to reduce the difference between the longest path length and the shortest path length. For this reason, it is possible to reduce the difference in path impedance among a plurality of switching element modules, thereby suppressing current concentration in one switching element module when the battery is reversely connected and It is possible to prevent failure.

  The invention according to claim 2 is the controller-integrated rotating electrical machine in which the number of the switching element modules connected to the counterclockwise bus bar portion and the number of the switching element modules connected to the clockwise bus bar are the same. . According to this configuration, since the counterclockwise busbar portion and the clockwise busbar portion are connected to the same number of switching element modules, it is possible to easily match the path length of the counterclockwise busbar portion with the route length of the clockwise busbar portion. It is possible to equalize both path lengths. For this reason, the difference of the path | route impedance in a some switching element module can be made small.

  According to a third aspect of the present invention, among the plurality of switching element modules, the switching element module located farthest from the connection portion around the rotation axis on the path of the bus bar is connected to the counterclockwise bus bar portion. And a control device-integrated rotating electrical machine having a power terminal connected to the clockwise busbar portion. According to this configuration, each of the counterclockwise busbar portion and the clockwise busbar portion is connected to the power supply terminal of the switching element module located farthest around the rotation axis from the connection portion on the busbar path. It is possible to equalize the path length via the bus bar part and the path length via the clockwise bus bar part, thereby reducing the difference in path impedance among the plurality of switching element modules.

  According to a fourth aspect of the present invention, the bus bar includes a positive bus bar that connects the positive power supply terminal of the switching element module to the first external connection terminal member, and a negative power supply terminal of the switching element module as the second external connection terminal member. A negative electrode bus bar to be connected, and the positive electrode bus bar extends from the connecting part side to the first external connection terminal member toward the rotation axis to the left and right around the rotation axis. This is a controller-integrated rotating electrical machine having a counterclockwise positive bus bar portion and a clockwise positive bus bar portion connected to the positive power supply terminal of the switching element module.

  According to this configuration, the positive electrode bus bar extends from the connection portion side between the first external connection terminal member and the counterclockwise positive electrode bus bar portion extending counterclockwise with respect to the rotation axis from the connection portion side with the first external connection terminal member. A clockwise positive bus bar portion extending clockwise with respect to the rotation axis, so that the longest path length of the path length from the positive power supply terminal of each switching element module to the external connection terminal member via the positive bus bar Shortening, that is, the difference between the longest path length and the shortest path length can be reduced. For this reason, it is possible to reduce the difference in path impedance among a plurality of switching element modules, thereby suppressing current concentration in one switching element module when the battery is reversely connected and It is possible to prevent failure.

  The invention according to claim 5 is a controller-integrated dynamoelectric machine in which each switching element module is a module in which a plurality of upper arm elements and lower arm elements constituting a switching circuit are included in the same resin-sealed package. .

  According to this configuration, a plurality of sets of upper arm elements and lower arm elements are accommodated in the same resin-sealed package, so that the distance between the upper and lower arm elements between the groups can be reduced. For this reason, when one set of upper and lower arm elements in the same resin-sealed package generates heat, the heat is easily transmitted to the other set of upper and lower arm elements in the same resin-sealed package. It is possible to prevent current concentration from easily occurring in the arm element.

  According to a sixth aspect of the present invention, the bus bar is divided into a controller-integrated dynamoelectric machine in the circumferential direction at a position opposite to the connection portion side with the external connection terminal member across the center of the rotation shaft. It is.

  According to this configuration, the portions extending in the left and right directions around the rotation axis from the connection portion side of the bus bar with the external connection terminal member are not connected at opposite positions across the center of the rotation axis. While being able to shorten reliably, since the site | parts extended to the left and right each are not divided | segmented to the axial direction, the axial direction full length of a control apparatus integrated rotary electric machine can be shortened.

  According to a seventh aspect of the present invention, the bus bar extends in parallel to a plane orthogonal to the rotation axis and is symmetric with respect to a line passing through the center of the rotation axis and in a direction orthogonal to the rotation axis. The controller-integrated dynamoelectric machine formed and arranged in

  According to this configuration, the bus bar extends in parallel to the plane orthogonal to the rotation axis and is formed and arranged symmetrically with respect to the above line. Therefore, the path length from the connection portion of the bus bar to the switching element module is reduced. Of these, the longest path length can be shortened, that is, the difference between the shortest path length and the longest path length can be reduced. For this reason, the difference of the path impedance in each switching element module can be made small reliably, and, thereby, the current concentration to one switching element module at the time of battery reverse connection can be suppressed.

  According to an eighth aspect of the present invention, the control circuit is mounted on a control board provided with a notch around a part of the rotation axis, and the external connection terminal member is disposed in the notch or in the notch. This is a controller-integrated dynamoelectric machine arranged on the radially outer side of the notch.

  According to this configuration, it is possible to secure an arrangement space for the external connection terminal member to which the bus bar is connected without affecting the arrangement of the switching element module around the rotation axis. Further, since the control board can be formed and arranged in accordance with the mounting layout of the switching element module around the rotation axis, a large board area can be secured on the control board and the mounting area of each element can be increased.

  The invention according to claim 9 is characterized in that the bus bar has a first through hole vacated in a radial direction with respect to the rotation shaft and a second through hole vacated in an axial direction with respect to the rotation shaft, and the external connection terminal. The member is a controller-integrated rotating electrical machine that is inserted into one of the first through hole and the second through hole and connected to the bus bar.

  According to this configuration, the external connection terminal member connected to the bus bar can be inserted into the first through hole vacated in the radial direction, and can also be inserted into the second through hole vacated in the axial direction. . That is, the external connection terminal member can be selectively inserted into the bus bar through the first through hole and the second through hole. For this reason, the variation which can mount a control apparatus integrated rotary electric machine can be increased, and it can prevent that the kind of control apparatus integrated rotary electric machine increases corresponding to various variations.

  According to a tenth aspect of the present invention, the control device includes: a resin case in which the bus bar is integrated; and a resin member injected in a state where the control circuit and the switching element module are accommodated in the resin case. , A control device-integrated rotating electrical machine.

  According to this configuration, the control circuit and the switching element module housed in the resin case can be reliably fixed using the resin member. In addition, the thermal resistance can be lowered, heat-generating parts such as switching element modules and bus bars can be easily dissipated and cooled, and the elements in the switching element module and the like are also resistant to the environment and foreign matter intrusion. Can be increased.

  According to an eleventh aspect of the present invention, the rotating electrical machine has two sets of stator windings, and the counterclockwise bus bar portion extends counterclockwise from the connecting portion side with respect to the rotating shaft. A power supply terminal of the switching element module that controls energization of the stator winding is connected to the external connection terminal member, and the clockwise busbar portion extends clockwise from the connection portion side with respect to the rotation shaft. The controller-integrated rotating electrical machine connects the power supply terminal of the switching element module that controls energization of the remaining set of stator windings to the external connection terminal member.

  According to this configuration, the surge voltage generated in the switching element in the switching element module corresponding to one set of stator windings corresponds to the bus bar portion corresponding to the set → the external connection terminal member → the other set. The path impedance between the switching elements corresponding to the two sets of stator windings is propagated to the switching elements in the switching element module corresponding to the other set of stator windings via the bus bar portion. Is big. For this reason, it is possible to make it difficult to propagate the propagation surge voltage between these switching elements, and it is possible to reduce the magnitude of the propagation surge voltage. Therefore, even if the self-surge voltage and the propagation surge voltage are superposed in timing, the overall surge voltage can be suppressed to a small value.

  The invention according to claim 12 is the controller-integrated dynamoelectric machine in which the control device has a capacitor interposed between power supply terminals of the switching element module. According to this configuration, the capacitor can smooth the voltage between the power supply terminals and can absorb the propagation surge voltage propagating between the switching elements in the switching element module.

  According to a thirteenth aspect of the present invention, an even number of capacitors are provided, and the even number of capacitors are symmetrically arranged by the same number on the left and right sides around the rotation axis across the connection portion between the bus bar and the external connection terminal member. Is a control device-integrated dynamoelectric machine arranged in

  According to this configuration, when the battery is reversely connected, a current flows by branching to the capacitors arranged on the left and right sides around the rotation axis. For this reason, when the battery is reversely connected, it is possible to suppress the current from being concentrated on one capacitor, and it is possible to prevent a decrease in capacity due to the heat of the capacitor. In addition, it is possible to further suppress current concentration on one switching element module, and to further prevent the elements of the switching element module from being easily damaged by heat generation.

  In the invention according to claim 14, the number of the capacitors is four or more, and the capacitors have a larger capacity as they are arranged closer to the connection portion between the bus bar and the external connection terminal member. This is a controller-integrated rotating electrical machine.

  According to this configuration, since a capacitor having a large capacity is generally large, even if the current is biased to a capacitor having a large capacity arranged on the side close to the connection portion with the external connection terminal member when the battery is reversely connected, The heat generation of the capacitors is suppressed, whereby the heat generation of the plurality of capacitors can be made uniform on the left and right sides around the rotation axis, and the heat of the capacitors can be prevented from being unevenly generated.

  The invention according to claim 15 is the controller-integrated dynamoelectric machine in which both terminals of the capacitor are covered with resin. According to this configuration, it is possible to improve the reliability of the capacitor with respect to environment resistance and vibration resistance.

  According to a sixteenth aspect of the present invention, the bus bar includes a positive bus bar that connects the positive power supply terminal of the switching element module to the first external connection terminal member, and a negative power supply terminal of the switching element module as the second external connection terminal member. A positive electrode bus bar to be connected, and the positive electrode bus bar and the negative electrode bus bar are a controller-integrated dynamoelectric machine arranged such that the plate surfaces face each other.

  According to this configuration, the bus bars can be arranged close to each other and the currents flowing through the two bus bars can be circulated in opposite directions, so that the magnetic flux due to the current flow in the bus bars can be effectively canceled out. Can do. Therefore, since the wiring inductance in the bus bar can be reduced, the self-surge voltage generated with the switching of the switching element in the switching element module can be suppressed.

It is a top view at the time of seeing the controller integrated rotary electric machine concerning one embodiment of the present invention from the axial direction one side. FIG. 2 is a II-II cross-sectional view of the controller-integrated rotating electrical machine shown in FIG. 1. It is a circuit diagram of the control apparatus with which the control apparatus integrated rotary electric machine of this embodiment is provided. It is a top view at the time of seeing the case member of the rotary electric machine with an integrated control apparatus of this embodiment from the axial direction one side. It is VV sectional drawing of the case member shown in FIG. It is a top view at the time of seeing the case member of the control apparatus integrated rotating electrical machine of this embodiment from the other side in the axial direction. It is a top view at the time of seeing the case member after the power module is arrange | positioned of the control apparatus integrated rotary electric machine of this embodiment from the axial direction one side. It is VIII-VIII sectional drawing of the case member shown in FIG. It is a top view at the time of seeing the case member after the wiring board of the control device integrated rotating electrical machine of this embodiment is arranged from one axial direction side. It is XX sectional drawing of the case member shown in FIG. It is sectional drawing of the case member by which the resin member was inject | poured inside the control apparatus integrated rotary electric machine of this embodiment. It is sectional drawing of the periphery of the field circuit IC and the heat sink for field circuit IC mounted in the wiring board of the control apparatus integrated rotary electric machine of this embodiment. It is sectional drawing of the periphery of the microcomputer and the heat sink for microcomputers which were mounted in the wiring board of the control apparatus integrated rotary electric machine of this embodiment. It is a top view at the time of seeing the bus-bar and capacitor | condenser with which the control apparatus integrated rotary electric machine of this embodiment is provided from the axial direction one side. It is a perspective view showing arrangement position relation of two bus bars with which a control device integrated rotary electric machine of this embodiment is provided. It is a figure showing the relationship between the electric current which flows into a switching element, and a self surge voltage. It is a figure showing the relationship between the distance from a surge generation source, and a surge propagation rate. It is a figure for demonstrating that a voltage application timing overlaps between phases. The figure showing the relationship between the current change of each phase of the UVW system and the XYZ system in comparison with the controller integrated rotating electric machine of the present embodiment, and the timing at which the self surge voltage and the propagation surge voltage are superimposed. is there. It is a figure showing the relationship between the electric current change of each phase in the control apparatus integrated rotary electric machine of this embodiment, and the timing with which a self surge voltage and a propagation surge voltage overlap. It is a top view at the time of seeing a case member after a wiring board is arranged of a control device integrated rotating electrical machine concerning one modification of the present invention from the axial direction one side. It is principal part sectional drawing of the control apparatus integrated rotary electric machine which concerns on one modification of this invention. It is principal part sectional drawing of the control apparatus integrated rotary electric machine which concerns on one modification of this invention. It is a perspective view of the principal part of the bus bar with which the control apparatus integrated rotating electrical machine shown in FIG. 23 is provided. It is a top view at the time of seeing the principal part of the bus bar with which the control device integrated rotating electrical machine concerning one modification of the present invention is provided from the axial direction one side.

  Hereinafter, specific embodiments of the control apparatus-integrated rotating electrical machine according to the present invention will be described with reference to FIGS.

  First, the configuration of the controller-integrated rotating electrical machine 1 of the present embodiment will be described.

  The controller-integrated rotating electrical machine 1 is mounted on a vehicle, for example, and generates driving force for driving the vehicle when power is supplied from a power source 2 such as a battery, and is also driven from the engine of the vehicle. It is a device that generates electric power for charging the power supply 2 when power is supplied. As shown in FIGS. 1 and 2, the controller-integrated rotating electrical machine 1 integrally includes a rotating electrical machine 10 and a control device 11.

  The rotating electrical machine 10 is a device that generates a driving force for driving the vehicle by being supplied with electric power, and generates electric power for charging the power source 2 by being supplied with the driving force from the engine. is there. The rotating electrical machine 10 is a three-phase AC motor generator. The rotating electrical machine 10 includes a housing 100, a stator 101, a rotor 102, a slip ring 103, a brush 104, and a rotation angle detection magnet 105.

  The housing 100 is a member that houses the stator 101 and the rotor 102 and supports the rotor 102 rotatably. The housing 100 is also a member to which the control device 11 is fixed. The housing 100 includes an arcuate plate-like fitting portion 100a that fits with the control device 11 when the control device 11 is fixed.

  The stator 101 is a member that forms part of a magnetic path and generates a rotating magnetic field when a current flows. The stator 101 includes a stator core 101a and a stator winding 101b. The stator winding 101b is wound around the stator core 101a. Two sets of stator windings 101b are provided. Each set of stator windings 101b is composed of three-phase windings. The three-phase windings of the stator windings 101b of each group are arranged at equal intervals from each other, and are arranged in a state where the phases are shifted by 120 °. As shown in FIG. 3, the rotating electrical machine 10 has two sets of stator windings 101b-1 and 101b-2 each formed of a three-phase winding. The two sets of stator windings 101b-1 and 101b-2 are arranged so as to be shifted from each other by a predetermined electrical angle (for example, an electrical angle of 30 °).

  Hereinafter, the stator winding 101b-1 is referred to as a UVW stator winding 101b-1, and the stator winding 101b-2 is referred to as an XYZ stator winding 101b-2. The UVW-system stator winding 101b-1 includes a U-phase coil 101b-1U, a V-phase coil 101b-1V, and a W-phase coil 101b-1W. The phase winding 101b-2X, the Y phase winding 101b-2Y, and the Z phase winding 101b-2Z are assumed to be included. Further, the U-phase winding 101b-1U and the X-phase winding 101b-2X are shifted from each other by a predetermined electrical angle, and the V-phase winding 101b-1V and the Y-phase winding 101b-2Y are shifted from each other by a predetermined electrical angle. Thus, the W-phase winding 101b-1W and the Z-phase winding 101b-2Z are deviated from each other by a predetermined electrical angle.

  The rotor 102 is a member that forms part of a magnetic path and forms a magnetic pole when a current flows. The rotor 102 includes a rotating shaft 102a, a rotor core 102b, and a rotor winding 102c. The rotor core 102b has a hole through which the rotary shaft 102a is inserted, and is disposed on the outer peripheral side of the rotary shaft 102a. The rotor winding 102c is wound around the rotor core 102b.

  The slip ring 103 and the brush 104 are members that supply direct current to the rotor winding 102c. The slip ring 103 is fixed to the outer peripheral surface of the rotating shaft 102a through an insulating member 103a. The brush 104 is held by the brush holder 104b on the housing 100 side in a state where the tip surface is in contact with the outer peripheral surface of the slip ring 103 while being pressed toward the rotating shaft 102a by the spring 104a.

  The rotation angle detection magnet 105 is a member that generates a magnetic field for detecting the rotation angle of the rotor 102. The rotation angle detection magnet 105 is fixed to the axial end of the rotation shaft 102a while being held by the magnet holder 105a.

  The control device 11 is disposed on the outer side in the axial direction with respect to the housing 100 of the rotating electrical machine 10. The control device 11 controls the electric power supplied to the rotating electrical machine 10 from the power source 2 such as a battery in order to generate a driving force in the rotating electrical machine 10, and also charges the rotating electrical machine 10 to charge the power source 2. It is a device that converts generated power and supplies it to the power source 2.

  As shown in FIGS. 1, 2, and 4 to 11, the control device 11 includes a rotation angle detection circuit IC 110a, a power module 110b, a field circuit IC 110c, a microcomputer 110d, and a case member 111a. Members 111b and 111c, lid member 111d, power module heat sink 112a, field circuit IC heat sink 112b, microcomputer heat sink 112c, control board 113a, power supply wiring members 113b and 113c, and stator wiring A member 113d, a rotor wiring member 113e, an external communication wiring member 113f, a resin member 114, and a capacitor 120 are provided.

  The control board 113a is a plate-like internal wiring member for wiring between the rotation angle detection circuit IC110a, the power module 110b, the field circuit IC110c, and the microcomputer 110d. A wiring pattern is formed on the surface and inner layer of the control board 113a. The control board 113a is fixed inside the case member 111a. The control board 113a is arranged with respect to the rotating electrical machine 10 so that the plate surface thereof faces the axial direction of the rotating shaft 102a. As shown in FIG. 9, the control board 113a has a notch 115 formed in a part around the rotation shaft 102a.

  The rotation angle detection circuit IC110a is mounted on the back surface of the control board 113a (that is, the surface on the rotating electrical machine 10 side). The rotation angle detection circuit IC110a is disposed so as to face the rotation angle detection magnet 105 in the axial direction. The rotation angle detection circuit IC 110 a is an electronic component that constitutes a circuit for detecting the rotation angle of the rotor 102 based on the magnetic field generated by the rotation angle detection magnet 105.

  The power module 110 b is an electronic component that constitutes an inverter circuit as a power conversion device that performs power conversion with the rotating electrical machine 10. The power module 110b is a rectangular switching element module in which upper and lower arm elements including an upper arm element and a lower arm element constituting a switching circuit are included in the same resin package. A plurality of power modules 110b are provided. Hereinafter, it is assumed that three power modules 110b are provided, and are referred to as a first power module 110b-1, a second power module 110b-2, and a third power module 110b-3, respectively.

  As shown in FIG. 7, the three power modules 110 b-1, 110 b-2, and 110 b-3 are disposed around the rotation shaft 102 a of the rotating electrical machine 10 so as to surround the rotation shaft 102 a and to form an annular shape. Further, a non-arrangement region 116 in which the power module 110b is not provided is provided in a part around the rotation shaft 102a of the rotating electrical machine 10. This non-arrangement region 116 is a region corresponding to the notch 115 of the control board 113a. That is, the notch 115 of the control board 113a is disposed on the non-arrangement region 116 side around the rotation shaft 102a of the rotating electrical machine 10.

  Each of the power modules 110b-1, 110b-2, and 110b-3 is a module in which two sets of upper and lower arm elements each composed of an upper arm element and a lower arm element (that is, two phases) are integrated. The power module 110 b-1 includes upper and lower arm elements for the U phase and the V phase of the UVW stator winding 101 b-1 of the rotating electrical machine 10. The power module 110b-2 includes upper and lower arm elements for the W phase of the UVW system stator winding 101b-1 and the X phase of the XYZ system stator coil 101b-2. The power module 110b-3 includes upper and lower arm elements for the Y phase and the Z phase of the XYZ system stator winding 101b-2.

  As shown in FIG. 3, each of the power modules 110b-1, 110b-2, and 110b-3 includes four switching elements 117 corresponding to two-phase upper and lower arm elements, and four power elements corresponding to the respective arm elements. And a diode 118. The switching element 117 is, for example, a MOSFET or an IGBT. The diode 118 is a current return diode connected in parallel to the switching element 117. Each diode 118 has a negative temperature characteristic in which the forward voltage VF decreases as the temperature increases.

  The switching element 117 of the power module 110b is controlled by the microcomputer 110d. When each switching element 117 is appropriately switched at a predetermined timing, the direct current supplied from the power supply 2 is converted into a three-phase alternating current and supplied to the stator winding 101b. When the switching of the switching element 117 is stopped, the three-phase alternating current supplied from the stator winding 101 b is converted into direct current by the diode 118 and supplied to the power source 2.

  As shown in FIG. 9, the field circuit IC 110c is mounted on the surface of the control board 113a. The field circuit IC 110c is controlled by the microcomputer 110d. The field circuit IC 110c is an electronic component that constitutes a circuit for supplying a direct current to the rotor winding 102c.

  As shown in FIG. 9, the microcomputer 110d is mounted on the surface of the control board 113a. The microcomputer 110d is an electronic component that controls the power module 110b and the field circuit IC 110c based on a command input from the outside and a detection result of the rotation angle detection circuit IC 110a. The microcomputer 110d operates according to a program stored in advance, and controls the power module 110b and the field circuit IC 110c.

  The power module 110b, the field circuit IC 110c, and the microcomputer 110d generate heat during operation. The field circuit IC 110c and the microcomputer 110d are low heat generation electronic components that generate a relatively small amount of heat. On the other hand, the power module 110b is a high heat generation electronic component that generates a higher amount of heat than the field circuit IC 110c and the microcomputer 110d.

  The case member 111a is a member made of a resin that accommodates the rotation angle detection circuit IC 110a, the power module 110b, the field circuit IC 110c, and the microcomputer 110d. As shown in FIGS. 5, 8, 10, and 11, the case member 111a has a bottom part 111e, a peripheral wall part 111f, an opening part 111g, and a fitting part 111h. The bottom part 111e is a plate-shaped bottom part. The peripheral wall portion 111f is a cylindrical wall portion formed on one surface side of the bottom portion 111e. The opening 111g is an open part formed on the side opposite to the bottom 111e of the peripheral wall 111f. The fitting portion 111 h is a portion formed on the other surface side of the bottom portion 111 e and is a circular plate-like portion that fits with the fitting portion 100 a of the housing 100 when being fixed to the rotating electrical machine 10.

  The fixing members 111 b and 111 c are members made of metal for fixing the case member 111 a to the housing 100. The fixing members 111b and 111c are members that radiate the heat generated by the rotating electrical machine 10. The fixing members 111b and 111c are members made of aluminum, for example.

  As shown in FIG. 6, the fixing member 111b has a main body 111i, fins 111j, and holes 111k. The fixing member 111c has a main body part 111l, a fin part 111m, and a hole part 111n. The main body portions 111i and 111l are plate-like portions. The fin portions 111j and 111m are thin plate-like portions formed at a predetermined interval on one surface side of the main body portions 111i and 111l. The holes 111k and 111n are portions through which bolts for fixing the case member 111a to the housing 100 formed in the main body portions 111i and 111l are inserted. The fixing members 111b and 111c are insert-molded in the case member 111a in a state where the fin portions 111j and 111m and the holes 111k and 111n are exposed to the outside of the case member 111a on the rotating electrical machine 10 side.

  The lid portion 111d is a plate-like member made of resin for covering the opening 111g of the case member 111a.

  The power module heat sink 112a is a heat-generating member for high heat generation made of metal for radiating heat generated by the power module 110b to the outside of the case member 111a, and is made of, for example, aluminum. The heat sink 112a for power modules has a main body part 112d and a fin part 112e. The main body 112d is a plate-shaped part. The fin portion 112e is a thin plate-like portion formed on the one surface side of the main body portion 112d at a predetermined interval. The surface of the heat sink 112a for the power module is anodized. The power module heat sink 112a is electrically insulated with the other surface of the main body 112d exposed to the inside of the case member 111a and the fin 112e exposed to the outside of the case member 111a on the rotating electrical machine 10 side. The bottom 111e is insert-molded.

  The heat sink 112b for field circuit IC is a low heat-generating heat radiating member made of metal for radiating the heat generated by the field circuit IC 110c to the outside of the case member 111a, and is made of, for example, aluminum. As shown in FIG. 12, the field circuit IC heat sink 112b has a main body portion 112f and a fin portion 112g. The main body 112f is a plate-shaped part. The fin portions 112g are thin plate-like portions that are formed at a predetermined interval on one surface side of the main body portion 112f. The heat sink 112b for field circuit IC is electrically insulated with the main body portion 112f protruding into the case member 111a and the fin portion 112g exposed to the outside of the case member 111a on the rotating electrical machine 10 side. Insert molding is performed on the bottom 111e.

  The microcomputer heat sink 112c is a low heat-generating heat radiating member made of metal for radiating heat generated by the microcomputer 110d to the outside of the case member 111a, and is made of, for example, aluminum. As shown in FIG. 13, the heat sink 112c for microcomputer has a main body portion 112h and a fin portion 112i. The main body 112h is a plate-shaped part. The fin part 112i is a thin plate-like part formed on the one surface side of the main body part 112h at a predetermined interval. The heat sink 112c for the microcomputer is electrically insulated with the main body portion 112h protruding into the case member 111a and the fin portion 112i exposed to the outside of the case member 111a on the rotating electrical machine 10 side, and the bottom portion 111e. It is insert molded.

  The fixing members 111b and 111c, the power module heat sink 112a, the field circuit IC heat sink 112b, and the microcomputer heat sink 112c are separated from each other, and the case member 111a is interposed with the resin forming the case member 111a interposed therebetween. It is insert molded. The power module heat sink 112a, the field circuit IC heat sink 112b, and the microcomputer heat sink 112c have a total area viewed from the rotating electrical machine 10 mounting surface side of the case member 111a as viewed from the rotating electrical machine 10 mounting surface side of the case member 111a. It is set to be smaller than the area surrounded by the outline of the case member 111a. The fixed members 111b and 111c have a total area as viewed from the rotating electrical machine 10 mounting surface side of the case member 111a, the power module heat sink 112a viewed from the rotating electrical machine 10 mounting surface side of the case member 111a, and the field circuit IC. It is set to be smaller than the total area of the heat sink 112b and the microcomputer heat sink 112c.

  The power supply wiring member 113b is a positive bus bar made of metal for connecting the power supply connecting portion of the control board 113a and the positive power supply terminal of the power module 110b to the positive terminal of the power supply 2 such as a battery provided outside the case member 111a. It is. The power supply wiring member 113c is a negative electrode made of metal for connecting the power supply connecting portion of the control board 113a and the negative power supply terminal of the power module 110b to the negative electrode terminal of the power supply 2 provided outside the case member 111a via the vehicle body. It is a bus bar. Hereinafter, the power supply wiring member 113b is referred to as a positive electrode bus bar 113b, and the power supply wiring member 113c is referred to as a negative electrode bus bar 113c. The positive electrode bus bar 113b and the negative electrode bus bar 113c are formed of the same metal material.

  Each of the positive electrode bus bar 113b and the negative electrode bus bar 113c is a plate-like member configured by bending a copper plate, for example. Both the positive electrode bus bar 113b and the negative electrode bus bar 113c are integrated with the case member 111a. The positive electrode bus bar 113b and the negative electrode bus bar 113c are insulated from each other by the case member 111a.

  The positive bus bar 113b exposes the connection portion 113g connected to the control board 113a and the connection portion 113i connected to each of the two-phase upper arm elements of each power module 110b to the inside of the case member 111a, and also to the power source 2 side. The connecting member 113k to be connected is insert-molded in the case member 111a in a state where the connecting portion 113k is exposed to the outside of the case member 111a. Further, the negative electrode bus bar 113c exposes the connection portion 113h connected to the control board 113a and the connection portion 113j connected to each of the two-phase lower arm elements of each power module 110b to the inside of the case member 111a and the power source 2 The case member 111a is insert-molded with the connecting portion 113l connected to the side exposed to the outside of the case member 111a.

  The connecting portion 113k of the positive bus bar 113b with the power source 2 side and the connecting portion 113l of the negative bus bar 113c with the power source 2 are both on the non-arrangement region 116 side around the rotating shaft 102a of the rotating electrical machine 10, that is, the notch 115 of the control board 113a. Arranged on the side. Two connection portions 113k of the positive electrode bus bar 113b are divided and provided. These two connection portions 113k are connected to each other. One connecting portion 113l of the negative electrode bus bar 113c is provided to be separated from the two connecting portions 113k of the positive electrode bus bar 113b by an equal distance outward in the radial direction.

  The positive bus bar 113b extends from the two connection portions 113k to the left and right around the rotation shaft 102a of the rotating electrical machine 10, respectively. The left and right directions are directions when the positive bus bar 113b faces the rotating shaft 102a, and are not when the positive bus bar 113b is viewed from the inner side in the axial direction on the rotating electrical machine 10 side and are not on the rotating electrical machine 10 side. It is assumed that the rotation direction is viewed from the outside in the direction. As shown in FIG. 4, the positive electrode bus bar 113b includes a counterclockwise positive electrode bus bar portion 113bL and a clockwise positive electrode bus bar portion 113bR. The counterclockwise positive electrode bus bar portion 113bL is connected to one of the two connection portions 113k on the side of the rotating shaft 102a from one connection portion 113k (specifically, from the connection portion 113l disposed radially outside the two connection portions 113k). (Which is arranged on the right side) and extends counterclockwise (that is, counterclockwise) with respect to the rotating shaft 102a. Further, the right-handed positive electrode bus bar portion 113bR rotates from the other connection portion 113k of the two connection portions 113k (specifically, from the connection portion 113l toward the rotation shaft 102a). The shaft 102a extends clockwise (that is, clockwise).

  The negative electrode bus bar 113c extends radially inward from the connection portion 113l and extends to the left and right around the rotation shaft 102a of the rotating electrical machine 10. Note that the left and right are directions when the negative electrode bus bar 113c faces the rotating shaft 102a, and are not when the negative electrode bus bar 113c is viewed from the inner side in the axial direction on the rotating electric machine 10 side and are not on the rotating electric machine 10 side. It is assumed that the rotation direction is viewed from the outside in the direction. As shown in FIG. 4, the negative electrode bus bar 113c includes a counterclockwise negative electrode bus bar portion 113cL and a clockwise negative electrode bus bar portion 113cR. The counterclockwise negative electrode bus bar portion 113cL extends counterclockwise (that is, counterclockwise) with respect to the rotation shaft 102a from the connection portion 113l side. The clockwise negative bus bar portion 113cR extends clockwise (that is, clockwise) with respect to the rotating shaft 102a from the connection portion 113l side.

  Each of the positive bus bar 113b and the negative bus bar 113c is arranged such that the rotation angle detection magnet 105 and the rotation angle detection circuit IC 110a are arranged vertically above the center portion (specifically, a portion substantially coincident with the rotation shaft 102a). Is formed.

  The positive electrode bus bar 113b is formed symmetrically and arranged around the rotation shaft 102a from the middle point of the two connection portions 113k toward the rotation shaft 102a. Specifically, the left-handed positive electrode bus bar portion 113bL and the right-handed positive electrode bus bar portion 113bR extend in parallel to a plane orthogonal to the rotating shaft 102a and pass through the center of the rotating shaft 102a. Are formed symmetrically with respect to a line extending in a direction perpendicular to (i.e., line-symmetric).

  The positive electrode bus bar 113b has an opening 119b that opens at a part around the rotation shaft 102a of the rotating electrical machine 10. The opening 119b is provided at a position opposite to the midpoint of the line connecting the two connecting portions 113k with the rotation shaft 102a interposed therebetween, and is opposite to the non-arrangement region 116 with respect to the rotation shaft 102a. It is a site that opens to. The counterclockwise positive electrode bus bar portion 113bL and the clockwise positive electrode bus bar portion 113bR are spaced apart from each other via the opening 119b without being connected to each other at the opposite side of the two connecting portions 113k with the rotating shaft 102a interposed therebetween. .

  The negative electrode bus bar 113c is formed and arranged symmetrically around the rotation shaft 102a from the connection portion 113l toward the rotation shaft 102a. Specifically, the left-handed negative electrode bus bar portion 113cL and the right-handed negative electrode bus bar portion 113cR extend in parallel to a plane orthogonal to the rotation shaft 102a and pass through the center of the rotation shaft 102a. Are formed symmetrically with respect to a line extending in a direction perpendicular to (i.e., line-symmetric).

  The negative electrode bus bar 113 c has an opening 119 c that opens at a part around the rotation shaft 102 a of the rotating electrical machine 10. The opening 119c is provided at a position opposite to the connection portion 113l with the rotation shaft 102a interposed therebetween, and is a portion that opens to the opposite side of the non-arrangement region 116 with respect to the rotation shaft 102a. The counterclockwise negative electrode bus bar portion 113cL and the clockwise negative electrode bus bar portion 113cR are separated from each other through the opening 119c without being connected to each other at a position opposite to the connection portion 113l with the rotating shaft 102a interposed therebetween.

  The U-phase and V-phase included in the power module 110b-1 and the upper arm elements of the W-phase included in the power module 110b-2 are connected to the clockwise positive bus bar portion 113bR of the positive bus bar 113b. In addition, the left-hand positive bus bar portion 113bL of the positive bus bar 113b is connected to the X-phase included in the power module 110b-2 and the Y-phase and Z-phase included in the power module 110b-3.

  The U-phase and V-phase included in the power module 110b-1 and the lower arm elements of the W-phase included in the power module 110b-2 are connected to the clockwise negative bus bar portion 113cR of the negative electrode bus bar 113c. The left-handed negative bus bar portion 113cL of the negative bus bar 113c is connected to the X-phase included in the power module 110b-2 and the lower arm elements of the Y-phase and Z-phase included in the power module 110b-3.

  Both the positive electrode bus bar 113b and the negative electrode bus bar 113c are arranged on the rotating shaft 102a side (that is, radially inside) with respect to the power module 110b arranged around the rotating shaft 102a. The positive electrode bus bar 113b and the negative electrode bus bar 113c are insulated from each other and are spaced apart from each other in the radial direction of the rotating shaft 102a of the rotating electrical machine 10. The positive bus bar 113b or the negative bus bar 113c may have a portion bent or curved in the axial direction, for example, in a U shape or a rectangular shape in order to avoid contact with the other bus bars 113c and 113b.

  Each of the positive electrode bus bar 113b and the negative electrode bus bar 113c has a shape (for example, rectangular shape) that is bent or curved around the rotation shaft 102a along the inner peripheral side wall surface of the three power modules 110b on the radially inner side with respect to the power module 110b. In addition to being formed, the positive electrode bus bar 113b is disposed so as to extend inwardly in the radial direction with respect to the negative electrode bus bar 113c.

  The positive electrode bus bar 113b and the negative electrode bus bar 113c are formed and arranged along each other. The positive electrode bus bar 113b and the negative electrode bus bar 113c are separated from each other in a state where a predetermined interval is maintained in the radial direction over substantially the entire region extending along each other. In the positive electrode bus bar 113b and the negative electrode bus bar 113c which are separated by a predetermined distance, current flows in opposite directions. As shown in FIG. 15, the positive electrode bus bar 113b and the negative electrode bus bar 113c extend in parallel with the plane of the plate surface normal to the rotation axis 102a, and the plate surfaces are orthogonal to the rotation axis 102a. They are arranged so as to face each other while being spaced apart from each other (that is, facing each other). Note that the predetermined interval may be a predetermined fixed interval. The positive electrode bus bar 113b and the negative electrode bus bar 113c are arranged such that the normal lines of the plate surfaces extend in the axial direction and the side walls of the plates are opposed to each other while being spaced apart from each other in a direction orthogonal to the rotation shaft 102a. May be.

  As shown in FIGS. 3 and 14, the capacitor 120 is interposed between the positive terminal and the negative terminal of the power source 2, that is, between the positive power terminal and the negative power terminal of each power module 110b. That is, one end of the capacitor 120 is connected to the positive terminal side of the power source 2, and the other end of the capacitor 120 is connected to the negative terminal side of the power source 2. The capacitor 120 is provided to smooth the voltage in the inverter circuit. The capacitor 120 is, for example, an aluminum electrolytic capacitor or a multilayer capacitor formed in a substantially cylindrical shape. A total of four capacitors 120 are provided, two on the left and on the right, corresponding to the positive and negative bus bars 113b and 113c extending from the connecting portions 113k and 113l to the left and right around the rotation shaft 102a.

  Hereinafter, the two capacitors 120 disposed on the left side facing the rotation shaft 102a from the connecting portions 113k and 113l are referred to as capacitors 120a, and are represented by subscripts 1 and 2, respectively. Further, two capacitors 120 arranged on the right side from the connecting portions 113k and 113l toward the rotating shaft 102a are referred to as capacitors 120b, and are represented by subscripts 1 and 2, respectively.

  All the capacitors 120 are accommodated in the case member 111a. The capacitors 120 are arranged in a balanced manner on the left and right sides around the rotation shaft 102a across the connection portion 113k (specifically, the midpoint of the line segment connecting the two connection portions 113k). Capacitors 120a-1 and 120a-2 are arranged on the left side around the rotation axis 102a with respect to the left side connection portion 113k in FIG. 4 of the two connection portions 113k, and are arranged side by side. Capacitors 120b-1 and 120b-2 are arranged on the right side around the rotation shaft 102a with respect to the right side connection portion 113k in FIG. 4 of the two connection portions 113k, and are arranged side by side.

  Both terminals of each capacitor 120 are connected to the positive bus bar 113b and the negative bus bar 113c. Specifically, the capacitor 120a-1 and the capacitor 120a-2 are connected in parallel between the clockwise positive bus bar portion 113bR of the positive electrode bus bar 113b and the clockwise negative bus bar portion 113cR of the negative electrode bus bar 113c. The capacitor 120b-1 and the capacitor 120b-2 are connected in parallel between the counterclockwise positive electrode bus bar portion 113bL of the positive electrode bus bar 113b and the counterclockwise negative electrode bus bar portion 113cL of the negative electrode bus bar 113c. Both terminals of the capacitors 120a-1 and 120b-1 are directly connected to the positive bus bar 113b and the negative bus bar 113c. Further, both terminals of the capacitors 120a-2 and 120b-2 are connected to the positive bus bar 113b and the negative bus bar 113c via the terminals of the capacitors 120a-1 and 120b-1.

  The capacitor 120a and the capacitor 120b are arranged at symmetrical positions on the left and right around the rotating shaft 102a with the connecting portion 113k interposed therebetween. Specifically, the capacitor 120a-1 and the capacitor 120b-1 are arranged at symmetrical positions on the left and right around the rotation shaft 102a with the connection portion 113k interposed therebetween, and the capacitor 120a-2 and the capacitor 120b-2. Is arranged at a symmetrical position on the left and right around the rotation shaft 102a with the connecting portion 113k interposed therebetween.

  The total capacity obtained by summing the capacity of the capacitor 120a-1 and the capacity of the capacitor 120a-2 and the sum capacity obtained by summing the capacity of the capacitor 120b-1 and the capacity of the capacitor 120b-2 are the same. The capacity of the capacitor 120a-1 and the capacity of the capacitor 120b-1 are the same. Further, the capacity of the capacitor 120a-2 and the capacity of the capacitor 120b-2 are the same.

  Capacitor 120a-1 is arranged on a side that is electrically closer to connecting portion 113k than capacitor 120a-2. The capacity of the capacitor 120a-1 is larger than the capacity of the capacitor 120a-2. Capacitor 120b-1 is arranged on a side that is electrically closer to connection portion 113k than capacitor 120b-2. The capacity of the capacitor 120b-1 is larger than the capacity of the capacitor 120b-2. Both terminals of each capacitor 120 are potted with resin. The resin potting on both terminals of the capacitor 120 may be realized by using a resin member 114 described later.

  The stator wiring member 113d is a wiring member made of metal for connecting the output terminals of the upper and lower arm elements of each power module 110b to the stator winding 101b provided outside the case member 111a. The stator wiring member 113d is a member configured by bending a copper plate, for example. The stator wiring member 113d is a case member in which the connection portion 113m with the power module 110b is exposed inside the case member 111a and the connection portion 113n with the stator winding 101b is exposed outside the case member 111a. 111a is insert-molded.

  The rotor wiring member 113e is made of metal for connecting the rotor winding connecting portion of the control board 113a to the rotor winding 102c provided outside the case member 111a via the brush 104 and the slip ring 103. This is an external wiring member. The rotor wiring member 113e is a member configured by bending a copper plate, for example. The rotor wiring member 113e is inserted into the case member 111a in a state where the connection portion 113o with the control board 113a is exposed inside the case member 111a and the connection portion 113p with the brush 104 is exposed outside the case member 111a. Molded.

  The external communication wiring member 113f is an external wiring member made of metal for wiring the external communication connection portion of the control board 113a to an external device provided outside the case member 111a. The external communication wiring member 113f is a member configured by bending a copper plate, for example. The external communication wiring member 113f is exposed to the case member 111a in a state where the connection portion 113q to the control board 113a is exposed inside the case member 111a and the connection portion 113r to the external device is exposed to the outside of the case member 111a. Insert molded.

  The power module 110b is disposed in contact with the other surface of the main body 112d of the power module heat sink 112a via an insulating thin plate-like heat conduction member 110e. The power supply terminal of the power module 110b is connected to the connection portions 113i and 113j of the positive bus bar 113b and the negative bus bar 113c on the rotating shaft 102a side (that is, radially inner side) of the power module 110b. The output terminal of the power module 110b is connected to the connection portion 113m of the stator wiring member 113d on the radially outer side of the power module 110b.

  The rotation angle detection circuit IC110a is disposed at a position facing the rotation angle detection magnet 105 in the axial direction of the rotation shaft 102a. The field circuit IC 110c is disposed in contact with the other surface of the main body 112f of the field circuit IC heat sink 112b via the control board 113a. The microcomputer 110d is disposed in contact with the other surface of the main body 112h of the microcomputer heat sink 112c via the control board 113a.

  The resin member 114 has an insulating property injected into the case member 111a to waterproof the rotation angle detection circuit IC 110a, the power module 110b, the field circuit IC 110c, the microcomputer 110d, and the like housed in the case member 111a. It is a member made of resin. The resin member 114 is a gel-like member, for example. The resin member 114 includes a rotation angle detection circuit IC 110a, a power module 110b, a field circuit IC 110c, and a microcomputer 110d housed in the case member 111a, and a control board 113a, bus bars 113b and 113c, a stator wiring member 113d, Potted inside the case member 111a while being wired by the rotor wiring member 113e and the external communication wiring member 113f. The opening 111g of the case member 111a is covered with a lid member 111d.

  The control device 11 is fixed to the housing 100 by a bolt 111o inserted into the holes of the fixing members 111b and 111c in a state where the fitting portion 111h of the case member 111a is fitted to the fitting portion 100a of the rotating electrical machine 10. ing. An external connection terminal member 113u for connecting to the positive terminal of the power source 2 is connected to the connection portion 113k of the positive bus bar 113b. An external connection terminal member 113v for connecting to the negative terminal of the power supply 2 is connected to the connection portion 113l of the negative bus bar 113c via the housing 100 and the vehicle body.

  Each of the external connection terminal members 113u and 113v is, for example, a bolt-shaped member. The external connection terminal members 113u and 113v are disposed in the notch 115 provided on the control board 113a or on the radially outer side of the notch 115, and are located on the non-arrangement region 116 side around the rotation shaft 102a of the rotating electrical machine 10. Is arranged. The connection portion 113n of the stator wiring member 113d is connected to the stator winding 101b via the wiring member 113s. The connecting portion 113p of the rotor wiring member 113e is connected to the brush 104 via the wiring member 113t.

  Next, the operation of the control apparatus-integrated dynamoelectric machine 1 of this embodiment will be described. First, an operation when generating a driving force for driving the vehicle will be described.

  A negative terminal of the power source 2 such as a battery is connected to the vehicle body, and is connected to the connection portion 113l of the negative bus bar 113c via the housing 100. When the ignition switch (not shown) of the vehicle is turned on, the positive terminal of the power source 2 is connected to the connecting portion 113k of the positive bus bar 113b via the external connection terminal member 113u while the ignition is on.

  When such a connection is made, direct current is supplied to the power supply terminal of the power module 110b through the connection portions 113i and 113j of the positive bus bar 113b and the negative bus bar 113c. Further, a direct current is supplied to the control board 113a through the connection portions 113g and 113h of the positive electrode bus bar 113b and the negative electrode bus bar 113c, and the rotation angle detection circuit IC 110a, the field circuit IC 110c, and the microcomputer 110d through the wiring pattern of the control board 113a. Is supplied with direct current. The rotation angle detection circuit IC 110a, the field circuit IC 110c, and the microcomputer 110d each operate by being supplied with direct current.

  During operation, the rotation angle detection circuit IC 110 a detects the rotation angle of the rotor 102 based on the magnetic field generated by the rotation angle detection magnet 105. Further, during operation, the microcomputer 110d operates the power module 110b based on a command input from the outside through the wiring pattern of the external communication wiring member 113f and the control board 113a and the detection result of the rotation angle detection circuit IC110a. And the operation of the field circuit IC 110c are controlled.

  The control board 113a is connected to the connection part 113o of the rotor wiring member 113e. The connecting portion 113p of the rotor wiring member 113e is connected to the brush 104 via the wiring member 113t. The field circuit IC 110 c is controlled by the microcomputer 110 d and supplies direct current to the rotor winding 102 c via the wiring pattern of the control board 113 a, the rotor wiring member 113 e, the wiring member 113 t, the brush 104, and the slip ring 103. .

  The control board 113a is also connected to a signal terminal of the power module 110b. The output terminal of the power module 110b is connected to the connection portion 113m of the stator wiring member 113d. The connection portion 113n of the stator wiring member 113d is connected to the stator winding 101b via the wiring member 113s. The switching element 117 of the power module 110b is controlled by the microcomputer 110d, converts the direct current supplied to the power supply terminal into a three-phase alternating current, and passes through the stator wiring member 113d and the wiring member 113s to the stator winding 101b. Supply. When direct current is thus supplied from the power source 2 to the stator winding 101b via the power module 110b, the rotating electrical machine 10 generates a driving force to drive the vehicle.

  Next, an operation when generating power for charging the power source 2 will be described.

  When driving force is supplied from the vehicle engine, the stator winding 101b generates a three-phase alternating current. The microcomputer 110d stops switching of the switching element 117 of the power module 110b. The diode 118 of the power module 110b converts the three-phase alternating current supplied from the stator winding 101b via the wiring member 113s and the stator wiring member 113d into direct current, and connects the positive bus bar 113b, the negative bus bar 113c, and the external connection terminal. The power is supplied to the power supply 2 through the member 113u. When direct current is supplied to the power source 2 in this way, the power source 2 is charged by the power generated by the rotating electrical machine 10.

  Next, features of the control apparatus-integrated dynamoelectric machine 1 of the present embodiment and effects thereof will be described.

  In the present embodiment, the bus bars 113b and 113c extend from the connecting portions 113k and 113l to the external connection terminal members 113u and 113v toward the rotation shaft 102a of the rotating electrical machine 10 and to the left and right around the rotation shaft 102a. Furthermore, each of the left and right sides extends to the opposite side of the non-arrangement region 116 (that is, the notch 115) around the rotation shaft 102a across the rotation shaft 102a, and a plurality (specifically, two). Connected to the power supply terminal of the power module 110b.

  The positive electrode bus bar 113b has a clockwise positive bus bar part 113bR and a counterclockwise positive electrode bus bar part 113bL. The clockwise positive bus bar portion 113bR and the counterclockwise positive bus bar portion 113bL are connected to the same number (specifically, two) of positive power supply terminals of the power modules 110b. That is, the number of power modules 110b whose positive power supply terminals are connected to the clockwise positive bus bar portion 113bR is the same as the number of power modules 110b whose positive power supply terminals are connected to the counterclockwise positive bus bar portion 113bL.

  The clockwise positive bus bar portion 113bR extends clockwise from the connecting portion 113k side with respect to the rotating shaft 102a and is connected to the positive power supply terminals of the two power modules 110b-1 and 110b-2. The counterclockwise positive bus bar portion 113bL extends counterclockwise with respect to the rotating shaft 102a from the connection portion 113k side, and is connected to the positive power supply terminals of the two power modules 110b-2 and 110b-3. Among the three power modules 110b, the power module 110b-2 located farthest around the rotation shaft 102a from the connection portion 113k on the path of the positive bus bar 113b includes a positive power supply terminal connected to the clockwise positive bus bar portion 113bR, And a positive electrode power supply terminal connected to the counterclockwise positive electrode bus bar portion 113bL. The positive power terminal connected to the clockwise positive bus bar portion 113bR is a UVW positive power terminal. The positive power supply terminal connected to the counterclockwise positive bus bar portion 113bL is an XYZ-based positive power supply terminal.

  Moreover, the negative electrode bus bar 113c has a clockwise negative electrode bus bar portion 113cR and a counterclockwise negative electrode bus bar portion 113cL. The clockwise negative bus bar portions 113cR and the counterclockwise negative bus bar portions 113cL are connected to the same number (specifically, two) of negative power supply terminals of the power modules 110b. That is, the number of power modules 110b whose negative power supply terminals are connected to the clockwise negative bus bar portion 113cR is the same as the number of power modules 110b whose negative power supply terminals are connected to the counterclockwise negative bus bar portion 113cL.

  The clockwise negative bus bar portion 113cR extends clockwise from the connecting portion 113l side with respect to the rotation shaft 102a and is connected to the negative power supply terminals of the two power modules 110b-1 and 110b-2. The counterclockwise negative electrode bus bar portion 113cL extends counterclockwise from the connection portion 113l side with respect to the rotating shaft 102a, and is connected to the negative power supply terminals of the two power modules 110b-2 and 110b-3. Among the three power modules 110b, the power module 110b-2 located farthest from the connection portion 113l around the rotation shaft 102a on the path of the negative electrode bus bar 113c includes a negative power supply terminal connected to the clockwise negative bus bar portion 113cR, A negative power source terminal connected to the counterclockwise negative electrode bus bar portion 113cL. The negative power supply terminal connected to the clockwise negative bus bar portion 113cR is a UVW negative power supply terminal. The negative power supply terminal connected to the counterclockwise negative bus bar portion 113cL is an XYZ negative power supply terminal.

  In the comparison configuration in which the bus bar extends only to the left or right around the rotation axis from the connection portion side with the external connection terminal member, the path length from the external connection terminal member to each power module is in the direction in which the bus bar extends. Accordingly, the path impedance increases as the power module is further away from the external connection terminal member.

  In contrast, in the configuration of the present embodiment described above, the positive bus bar 113b is connected from the positive power supply terminal of each power module 110b as compared with a comparative configuration in which the bus bar extends only to either the left or right around the rotation axis. The longest path length is shortened among the path lengths to the external connection terminal member 113u and the path length from the negative power supply terminal of each power module 110b to the external connection terminal member 113v through the negative bus bar 113c. Among them, the longest path length can be shortened, that is, the difference between the longest path length and the shortest path length can be reduced with these path lengths.

  Further, the number of power modules 110b whose positive power supply terminals are connected to the clockwise positive bus bar section 113bR is equal to the number of power modules 110b whose positive power supply terminals are connected to the counterclockwise positive bus bar section 113bL (specifically, two Therefore, the path length via the clockwise positive bus bar portion 113bR and the path length via the counterclockwise positive bus bar portion 113bL can be easily matched, and the left-right difference between both path lengths can be reduced. Further, the number of power modules 110b whose negative power supply terminals are connected to the clockwise negative bus bar portion 113cR and the number of power modules 110b whose negative power supply terminals are connected to the counterclockwise negative bus bar portion 113cL are the same (specifically, two Therefore, the path length via the clockwise negative bus bar part 113cR and the path via the counterclockwise negative electrode bus bar part 113cL can be easily matched, and the left-right difference between the two path lengths can be reduced.

  For this reason, according to the present embodiment, the difference in path impedance between the plurality of power modules 110b can be reduced, thereby suppressing current from being concentrated on one power module 110b when the battery of the power supply 2 is reversely connected. It is possible to prevent the switching element 117 included in the power module 110b from being easily damaged by heat generation.

  In the present embodiment, a plurality of sets of upper arm elements and lower arm elements constituting a switching circuit are included in the same resin-sealed package of each power module 110b. In such a configuration, the distance between the upper and lower arm elements between each set can be reduced as compared with a comparison configuration in which only one set of upper and lower arm elements is included in one package. Therefore, according to this embodiment, when a set of upper and lower arm elements in the same resin-sealed package generates heat, the heat is easily transmitted to the other set of upper and lower arm elements in the same resin-sealed package. Therefore, it is possible to prevent current concentration from being easily generated in the pair of upper and lower arms.

  In the present embodiment, the positive electrode bus bar 113b extends from the connection portion 113k side to the external connection terminal member 113u toward the rotation shaft 102a of the rotating electrical machine 10 to the left and right around the rotation shaft 102a, with respect to the rotation shaft 102a. And is formed and arranged symmetrically with respect to a line passing through the center of the rotating shaft 102a and extending in a direction orthogonal to the rotating shaft 102a. That is, the positive electrode bus bar 113b includes a counterclockwise positive electrode bus bar portion 113bL extending in a counterclockwise direction from the connection portion 113k side and a clockwise positive electrode bus bar portion 113bR extending in a clockwise direction from the connection portion 113k, which are formed and arranged in line symmetry. Contains.

  Further, the negative electrode bus bar 113c extends from the connecting portion 113l side to the external connection terminal member 113v toward the rotation shaft 102a of the rotating electrical machine 10 to the left and right around the rotation shaft 102a, and is a surface orthogonal to the rotation shaft 102a. And is formed and arranged symmetrically with respect to a line passing through the center of the rotating shaft 102a and extending in a direction perpendicular to the rotating shaft 102a. In other words, the negative electrode bus bar 113c includes a counterclockwise negative electrode bus bar portion 113cL extending in a counterclockwise direction from the connection portion 113l side and a clockwise negative electrode bus bar portion 113cR extending in a clockwise direction from the connection portion 113l side. Contains.

  In such a configuration, the shortest path length and the longest path length are reduced among the path lengths from the connection portion 113k of the positive bus bar 113b to the three power modules 110b-1, 110b-2, and 110b-3. And the shortest path length among the path lengths from the connecting portion 113l of the negative electrode bus bar 113c to the three power modules 110b-1, 110b-2, 110b-3, that is, the shortest The difference between the route and the longest route can be reduced. For this reason, according to the present embodiment, the difference in path impedance between each of the power modules 110b-1, 110b-2, 110b-3 can be reliably reduced, and thus one power module at the time of reverse battery connection. Current concentration to 110b can be suppressed.

  In the present embodiment, the positive bus bar 113b has an opening 119b that opens to the opposite side of the non-arrangement region 116 with respect to the rotating shaft 102a of the rotating electrical machine 10, and the negative bus bar 113c is It has an opening 119c that opens to the opposite side of the non-arrangement region 116 with respect to the ten rotation shafts 102a. That is, in the positive electrode bus bar 113b, the counterclockwise positive electrode bus bar 113bL and the clockwise positive electrode bus bar 113bR are divided in the circumferential direction at positions opposite to the connection portion 113k side with the external connection terminal member 113u across the rotation shaft 102a. In addition, in the negative electrode bus bar 113c, the left-handed negative bus bar 113cL and the right-handed negative bus bar 113cR are rotated at positions opposite to the connection part 113l side with the external connection terminal member 113v across the rotation shaft 102a. It is divided in the direction.

  In such a configuration, the longest path length among the path lengths from the connection portion 113k of the positive bus bar 113b to each of the three power modules 110b-1, 110b-2, 110b-3 can be reliably shortened, and the negative bus bar The longest path length among the path lengths from the connection portion 113l of 113c to the three power modules 110b-1, 110b-2, and 110b-3 can be reliably shortened. For this reason, according to the present embodiment, the difference in path impedance between each of the power modules 110b-1, 110b-2, 110b-3 can be reliably reduced, and thus one power module at the time of reverse battery connection. Current concentration to 110b can be suppressed.

  Further, in this configuration, the counterclockwise positive bus bar portion 113bL and the clockwise positive bus bar portion 113bR of the positive electrode bus bar 113b are divided in a plane orthogonal to the rotation shaft 102a, and the counterclockwise negative electrode bus bar of the negative electrode bus bar 113c is provided. The division of the portion 113cL and the clockwise negative bus bar portion 113cR is performed in a plane orthogonal to the rotation shaft 102a. For this reason, since the division of each of the positive electrode bus bar 113b and the negative electrode bus bar 113c is not performed in the axial direction, the total axial length of the controller-integrated dynamoelectric machine 1 can be shortened.

  In this embodiment, the rotation angle detection circuit IC 110a, the microcomputer 110d as a control circuit, and the like are mounted on a control board 113a in which a notch 115 is formed in a part around the rotation shaft 102a. The control board 113a is disposed such that the notch 115 is located on the non-arrangement region 116 side around the rotation shaft 102a. The external connection terminal members 113u and 113v are arranged on the non-arrangement region 116 side, that is, in the notch 115 or on the radially outer side of the notch 115.

  In such a configuration, an arrangement space for the external connection terminal members 113u and 113v to which the bus bars 113b and 113c are connected can be secured without affecting the arrangement of the power module 110b around the rotating shaft 102a. Further, since the control board 113a can be formed and arranged in accordance with the mounting layout of the power module 110b around the rotating shaft 102a, a large board area can be secured in the control board 113a to increase the mounting area of each element. Can do.

  In the present embodiment, the positive electrode bus bar 113b and the negative electrode bus bar 113c are integrated with the resin case member 111a and are insert-molded into the case member 111a, and the resin member 114 is injected into the case member 111a. ing. In such a configuration, the controller-integrated rotating electrical machine 1 includes the case member 111a in which the positive electrode bus bar 113b and the negative electrode bus bar 113c are integrated, the microcomputer 110d, the power module 110b, and the rotation angle detection in the case member 111a. And a resin member 114 injected in a state in which the circuit IC 110a is accommodated.

  For this reason, according to this embodiment, the insulation of the positive electrode bus bar 113b and the negative electrode bus bar 113c can be ensured using the case member 111a. Further, the microcomputer 110d, the power module 110b, and the rotation angle detection circuit IC 110a housed in the case member 111a can be securely fixed using the resin member 114. Furthermore, compared to a configuration in which the resin member 114 is not injected into the case member 111a, the thermal resistance can be lowered, and heat generating components such as the power module 110b and the bus bars 113b and 113c can be easily radiated and cooled. In addition, it is possible to improve the environmental resistance of the elements in the power module 110b and the like and the reliability against the intrusion of foreign matter.

  In the present embodiment, the control device 11 has a capacitor 120 interposed between the power supply terminals of the power supply 2, that is, between the positive power supply terminal and the negative power supply terminal of the power module 110b, and four capacitors 120 are provided. It has been. The four capacitors 120 face the rotating shaft 102a from the connecting portion 113k between the positive electrode bus bar 113b and the external connecting terminal member 113u and the connecting portion 113l between the negative electrode bus bar 113c and the external connecting terminal member 113v. The same number is arranged at symmetrical positions on the left and right sides of the periphery.

  In such a configuration, when the battery is reversely connected, the current from the battery flows by branching to the capacitors 120 arranged on the left and right around the rotating shaft 102a. For this reason, according to the present embodiment, it is possible to suppress current from being concentrated on one capacitor 120 when the battery is reversely connected, and it is possible to prevent a decrease in capacity due to heat of the capacitor 120. Further, current concentration on one power module 110b can be further suppressed, and it is possible to further prevent the elements of the power module 110b from being easily damaged by heat generation.

  In the present embodiment, the two capacitors 120a-1 and 120a-2 arranged on the left side around the rotation shaft 102a with respect to the connecting portions 113k and 113l are the clockwise positive bus bar portion 113bR and the negative electrode bus bar of the positive bus bar 113b. 113c is connected in parallel with the clockwise negative bus bar portion 113cR. Further, the two capacitors 120b-1 and 120b-2 arranged on the right side around the rotation shaft 102a with respect to the connecting portions 113k and 113l are counterclockwise of the positive polarity bus bar portion 113bL and the negative polarity bus bar 113c of the positive polarity bus bar 113b. The negative electrode bus bar portion 113cL is connected in parallel.

  In such a configuration, when the battery is reversely connected, the current from the battery branched and flowing to the capacitors 120 arranged on the left and right around the rotating shaft 102a further flows to the two capacitors 120 connected in parallel. For this reason, according to the present embodiment, it is possible to suppress current from being concentrated on one capacitor 120 when the battery is reversely connected, and it is possible to prevent a decrease in capacity due to heat of the capacitor 120. Further, current concentration on one power module 110b can be further suppressed, and it is possible to further prevent the elements of the power module 110b from being easily damaged by heat generation.

  In the present embodiment, of the two capacitors 120a disposed on the left side around the rotation shaft 102a with respect to the connection portions 113k and 113l, the capacitor disposed on the side electrically close to the connection portions 113k and 113l. The capacity of 120a-1 is larger than the capacity of the capacitor 120a-2 disposed on the side far from the connecting portions 113k and 113l. Of the two capacitors 120b disposed on the right side around the rotation shaft 102a with respect to the connection portion 113k, the capacitance of the capacitor 120b-1 disposed on the side electrically close to the connection portions 113k and 113l is connected. Larger than the capacitance of the capacitor 120b-2 disposed on the side far from the portions 113k and 113l. That is, the capacitor 120 has a larger capacity as it is disposed closer to the connection portions 113k and 113l between the bus bars 113b and 113c and the external connection terminal members 113u and 113v.

  In general, since a capacitor having a large capacity is large, the capacitors 120a-1 and 120b-1 are larger than the capacitors 120a-2 and 120b-2. For this reason, according to the above configuration, when the battery is reversely connected, current is biased to the capacitors 120a-1 and 120b-1 having large capacities disposed at positions close to the connection portions 113k and 113l with the external connection terminal members 113u and 113v. However, the heat generation of the capacitors 120a-1 and 120b-1 is suppressed. Therefore, the heat generation of the two capacitors 120 on the left and right sides around the rotating shaft 102a can be made uniform, and the heat of the capacitors 120 can be prevented from being generated unevenly.

  In the present embodiment, both terminals of each capacitor 120 are potted with resin by, for example, a resin member 114 or the like. For this reason, according to this embodiment, the reliability with respect to the environmental resistance and vibration resistance of the capacitor 120 can be improved as compared with a configuration in which both terminals of the capacitor 120 are not potted with resin.

  In general, the positive electrode bus bar 113b and the negative electrode bus bar 113c have electrical inductance components. For this reason, when the switching element 117 of the power module 110b is switched, a surge voltage (so-called self-surge voltage) is generated between the collector and the emitter of the switching element 117. As shown in FIG. 16, the self-surge voltage increases as the current flowing through the switching element 117 increases. When the self-surge voltage is generated as described above, the surge voltage propagates to the other power module 110b via the bus bars 113b and 113c. Hereinafter, this propagating surge voltage is referred to as a propagating surge voltage. Accordingly, a self-surge voltage and a propagation surge voltage from other switching elements are applied between the collector and emitter of the switching element 117 of the power module 110b. The surge voltage applied to the switching element 117 is maximized when the self-surge voltage and the propagation surge voltage overlap with each other in timing. This superposition occurs when the voltage application timing to each phase coincides between the phases, as shown in FIG.

  In the contrast configuration in which the power modules are arranged in a row and connected to the bus bar extending annularly only to either the left or right around the rotation axis from the connection portion side with the external connection terminal member, the distance between the power modules via the bus bar Is relatively short and the path impedance therebetween is small, so that the propagation surge voltage easily propagates between the power modules. For this reason, in such a comparison configuration, the power module is likely to fail due to a surge accompanying switching of the switching element. Moreover, in order to suppress the surge accompanying switching of a switching element, it is possible to make the switching speed slow, but in this case, a loss will increase.

  On the other hand, in this embodiment, the positive electrode bus bar 113b and the negative electrode bus bar 113c extend from the connection portions 113k and 113l side to the external connection terminal members 113u and 113v to the left and right around the rotation shaft 102a of the rotating electrical machine 10, respectively. Furthermore, it extends to the opposite side of the non-arrangement region 116 around the rotary shaft 102a across the rotary shaft 102a, and the power terminals of a plurality (specifically, two) of power modules 110b It is connected to the. The clockwise positive bus bar portion 113bR and the counterclockwise positive bus bar portion 113bL of the positive electrode bus bar 113b are an opening 119b that opens at a position opposite to the midpoint of the line connecting the two connecting portions 113k with the rotating shaft 102a interposed therebetween. have. The right-handed negative bus bar part 113cR and the left-handed negative bus bar part 113cL of the negative electrode bus bar 113c have an opening 119c that opens at a position opposite to the connection part 113l with the rotating shaft 102a interposed therebetween.

  The U-phase, V-phase, and W-phase upper and lower arm elements are connected to the clockwise positive bus bar portion 113bR of the positive bus bar 113b and the clockwise negative bus bar portion 113cR of the negative bus bar 113c. In addition, the upper and lower arm elements of the X phase, the Y phase, and the Z phase are connected to the counterclockwise positive electrode bus bar portion 113bL and the counterclockwise negative electrode bus bar portion 113cL. That is, the clockwise positive bus bar portion 113bR and the clockwise negative bus bar portion 113cR connect the positive power supply terminal and the negative power supply terminal corresponding to the switching element 117 of the U phase, the V phase, and the W phase to the external connection terminal members 113u and 113v. Let Further, the counterclockwise positive electrode bus bar portion 113bL and the counterclockwise negative electrode bus bar portion 113cL connect the positive power supply terminal and the negative power supply terminal corresponding to the X-phase, Y-phase, and Z-phase switching elements 117 to the external connection terminal members 113u and 113v. Let

  In this structure, the propagation of surge voltage between the UVW switching element 117 and the XYZ switching element 117 via the bus bars 113b and 113c causes the connection portions 113k and 113l of the bus bars 113b and 113c to the power supply 2 side. Over a relatively long distance. Specifically, the surge voltage generated in the UVW switching element 117 is a clockwise positive bus bar portion 113bR and a clockwise negative bus bar portion 113cR → connecting portions 113k, 113l → a counterclockwise positive bus bar portion 113bL and a counterclockwise negative bus bar portion 113cL. And the surge voltage generated in the XYZ switching element 117 is counterclockwise positive and negative counterclockwise bus bar portions 113bL and 113cL → connecting portions 113k and 113l → right. The light propagates to the UVW switching element 117 in a detour through the rotating positive electrode bus bar portion 113bR and the clockwise negative bus bar portion 113cR.

  As shown in FIG. 17, the propagation rate at which the surge voltage propagates decreases as the distance from the switching element 117, which is a surge generation source, increases. This is because the longer the distance, the larger the path impedance. According to the configuration of this embodiment, since the path impedance between the UVW switching element 117 and the XYZ switching element 117 is large, it is possible to make it difficult for the propagation surge voltage to propagate between the switching elements 117. The magnitude of the propagation surge voltage can be reduced. Therefore, even if the self-surge voltage and the propagation surge voltage are superposed in timing, the overall surge voltage can be suppressed to a small value.

  In the present embodiment, the UVW-type stator winding 101b-1 and the XYZ-type stator winding 101b-2 are arranged so as to be shifted from each other by, for example, an electrical angle of 30 °. For this reason, a propagation surge voltage is likely to propagate between the switching element 117 corresponding to the UVW type stator winding 101b-1 and the switching element 117 corresponding to the XYZ type stator winding 101b-2. As shown in FIG. 19, the current flowing through the switching element 117 has a maximum current Imax required to drive the vehicle as shown in FIG. It becomes 0.97 "times.

  On the other hand, in the present embodiment, as described above, since the propagation surge voltage hardly propagates between the UVW switching element 117 and the XYZ switching element 117, the superposition of the self-surge voltage and the propagation surge voltage is as follows. It occurs in relation to the other phase of the same stator winding 101b. The three-phase windings of the same stator winding 101b have phases shifted from each other by 120 °. For this reason, at the timing at which the self-surge voltage and the propagation surge voltage are superimposed, the current flowing through the switching element 117 has a maximum current Imax required for driving the vehicle as shown in FIG. "It will be doubled.

  That is, in the present embodiment, the current flowing through the switching element 117 at the timing at which the self surge voltage and the propagation surge voltage are superimposed can be reduced from 0.97 Imax to 0.5 Imax. The smaller the current flowing through the switching element 117, the lower the generated self-surge voltage. For this reason, according to this embodiment, the magnitude of the propagation surge voltage can be reduced at the timing at which the self-surge voltage and the propagation surge voltage are superimposed, and the overall surge voltage can be kept small.

  In the present embodiment, the capacitor 120 is interposed between the positive electrode bus bar 113b and the negative electrode bus bar 113c. The placement and connection of the capacitor 120 is performed in the vicinity of the connection portions 113k and 113l where the counterclockwise bus bar portions 113bL and 113cL of the bus bars 113b and 113c are connected to the clockwise bus bar portions 113bR and 113cR. The capacitor 120 is connected to the bus bars 113b and 113c in the middle of a path connecting the UVW switching element 117 and the XYZ switching element 117.

  In such a configuration, since the capacitor 120 is provided in the middle of the above-described path, the propagation surge voltage propagating between the UVW switching element 117 and the XYZ switching element 117 is absorbed by the capacitor 120 and reduced. can do. For this reason, it is possible to make it difficult to propagate the propagation surge voltage between the switching elements 117, so that even if the self surge voltage and the propagation surge voltage overlap with each other in timing, the overall surge voltage can be kept small. .

  If the purpose is only to absorb the propagation surge voltage using the capacitor 120, at least the capacitor 120 connected in the middle of the path connecting the UVW switching element 117 and the XYZ switching element 117 should be provided. It is sufficient to provide one, and it is sufficient if it can absorb the propagation surge voltage sufficiently and sufficiently.

  As described above, according to the configuration of the present embodiment, the surge voltage can be suppressed to be small, so that it is possible to prevent the switching element 117 of the power module 110b from easily failing due to a surge caused by switching. Moreover, since it is unnecessary to reduce the switching speed in order to suppress the surge voltage, the surge voltage can be suppressed without increasing the loss.

  Further, in the present embodiment, the positive electrode bus bar 113b and the negative electrode bus bar 113c are arranged so that the plate surfaces face each other while being separated in the radial direction, as shown in FIG. For this reason, the current flowing through each of the bus bars 113b and 113c can be circulated in opposite directions while the entire area of the plate surface of the bus bars 113b and 113c is disposed close to the plate surface of the other bus bars 113c and 113b. , 113c can effectively cancel each other out of the magnetic flux.

  Therefore, according to the configuration of the present embodiment, by arranging both the bus bars 113b and 113c so that the plate surfaces face each other, the wiring inductance in the bus bars 113b and 113c can be reduced, so that the switching element 117 can be switched. The accompanying self-surge voltage can be suppressed. At the same time, since the propagation surge voltage can be suppressed along with the suppression of the self-surge voltage, it is possible to prevent the switching element 117 from being easily damaged due to the surge.

  In the present embodiment, the bus bars 113b and 113c are integrated with the resin case member 111a, and the resin member 114 is injected into the case member 111a. Therefore, the positive bus bar 113b and the negative bus bar Insulation with 113c is ensured. Thus, if the insulation between the positive electrode bus bar 113b and the negative electrode bus bar 113c can be secured by the resin member 114 injected into the case member 111a, the resin member 114 is not injected into the case member 111a. Thus, both bus bars 113b and 113c can be arranged closer to each other.

  The shorter the distance between the two bus bars 113b and 113c, the smaller the wiring inductance in the bus bars 113b and 113c. Therefore, according to the present embodiment, by injecting the resin member 114 into the case member 111a in which the bus bars 113b and 113c are integrated, the wiring inductance in the bus bars 113b and 113c can be further reduced. A self-surge voltage and a propagation surge voltage that are generated when the element 117 is switched can be suppressed.

(Deformation)
In the above embodiment, the positive electrode bus bar 113b has a portion around the rotation shaft 102a of the rotating electrical machine 10 (specifically, the midpoint of the line segment connecting the two connecting portions 113k sandwiches the rotation shaft 102a). The negative electrode bus bar 113c has a part around the rotating shaft 102a of the rotating electrical machine 10 (specifically, the connecting portion 113l is opposed to the rotating shaft 102a across the rotating shaft 102a). An opening 119c that opens at a position on the side). However, the present invention is not limited to this. That is, only one of the positive electrode bus bar 113b and the negative electrode bus bar 113c is formed so as to have the openings 119b and 119c, and the other is formed in an annular shape around the rotation shaft 102a so as not to have the openings 119c and 119b. May be.

For example, as shown in FIG. 21, the negative electrode bus bar 113c is formed to have an opening 119c, and one end of the clockwise negative bus bar portion 113cR and one end of the counterclockwise negative electrode bus bar portion 113cL are separated via the opening 119c. On the other hand, the positive electrode bus bar 113b is formed so as not to have the opening 119b, and one end of the clockwise positive bus bar portion 113bR and one end of the counterclockwise positive electrode bus bar portion 113bL sandwich the rotating shaft 102a with the connection portion 113k. And may be connected at the opposite position. That is, the positive electrode bus bar 113b may not be divided in the circumferential direction at a position opposite to the connection portion 113k side across the center of the rotating shaft 102a.
In contrast, the positive electrode bus bar 113b is formed to have an opening 119b, and one end of the clockwise positive bus bar portion 113bR and one end of the counterclockwise positive bus bar portion 113bL are separated from each other through the opening 119b. On the other hand, the negative electrode bus bar 113c is formed so as not to have the opening portion 119c, and one end of the clockwise negative bus bar portion 113cR and one end of the counterclockwise negative electrode bus bar portion 113cL sandwich the rotating shaft 102a with the connection portion 113l. And may be connected at the opposite position. In other words, the negative electrode bus bar 113c may not be divided in the circumferential direction at a position opposite to the connection portion 113l side with respect to the center of the rotating shaft 102a.

  In the above embodiment, both the positive electrode bus bar 113b and the negative electrode bus bar 113c extend to the left and right around the rotation shaft 102a of the rotating electrical machine 10 from the connection portions 113k and 113l side with the external connection terminal members 113u and 113v, respectively. ing. However, the present invention is not limited to this, and at least the positive electrode bus bar 113b of the positive electrode bus bar 113b and the negative electrode bus bar 113c is connected to the external connection terminal member 113u from the side of the connection portion 113k around the rotating shaft 102a of the rotating electrical machine 10. It only has to extend to each. This is because the product body can be used as the negative electrode bus bar 113c, and the positive electrode bus bar 113b cannot use a very thick member in order to reduce the size of the product. This is because an impedance difference is likely to occur.

  In the above embodiment, each power module 110b has two sets of upper and lower arm elements, and has a total of four switching elements 117 and a total of four diodes 118. However, the present invention is not limited to this, and each power module 110b may have one set of upper and lower arm elements, or may have three or more sets of upper and lower arm elements.

  In the above-described embodiment, a total of four capacitors 120 are provided on the left and right sides around the rotary shaft 102a from the connection portions 113k and 113l side. However, the present invention is not limited to this, and in order to equalize the branch current when the battery is reversely connected, it is only necessary to provide the same number of capacitors 120 so that the capacitors 120 are balanced on the left and right sides. It is sufficient if an even number is provided.

  In the above embodiment, the power module heat sink 112a is disposed on the rotating electrical machine 10 side in the axial direction with respect to the power module 110b. However, the present invention is not limited to this. That is, as shown in FIG. 22, the power module heat sink 112a may be disposed on the opposite side of the power module 110b from the rotating electrical machine 10 in the axial direction. According to such a modification, the power module heat sink 112a can be easily cooled, so that the heat dissipation of the power module 110b can be improved.

  In the above embodiment, the bolt-shaped external connection terminal members 113u and 113v are connected to the connection portions 113k and 113l disposed on the non-arrangement region 116 side of the bus bars 113b and 113c. However, the bus bars 113b and 113c have two connection portions 113k and 113l, respectively, and the bolt-shaped external connection terminal members 113u and 113v are connected to the selected bus bars 113b and 113c, respectively. Good. That is, as shown in FIGS. 23 and 24, the ends of the bus bars 113b and 113c on the non-arrangement region 116 side are bent in an L shape, and then the diameter of the bus bars 113b and 113c with respect to the rotating shaft 102a A first through hole 122 that is open in the direction and a second through hole 124 that is open in the axial direction with respect to the rotating shaft 102a, and the external connection terminal members 113u and 113v are connected to the first through hole 122 and the bus bars 113b and 113c, and It may be inserted into any one of the second through holes 124.

  In this modification, the bus bars 113b and 113c may be divided into an annular portion around the rotation shaft 102a and an L-shaped portion provided with the first through hole 122 and the second through hole 124. In this case, the L-shaped portion and the annular portion of the bus bars 113b and 113c may be integrated when the external connection terminal members 113u and 113v are inserted into the first through hole 122 or the second through hole 124. .

  In such a modification, the external connection terminal members 113u and 113v connected to the bus bars 113b and 113c can be inserted into the first through hole 122 that is vacant in the radial direction, and the second through hole that is vacant in the axial direction. The external connection terminal members 113u and 113v can be selectively inserted into the bus bars 113b and 113c in the radial direction and the axial direction. For this reason, the variation which can mount a control apparatus integrated rotary electric machine can be increased, and it can prevent that the kind of control apparatus integrated rotary electric machine increases corresponding to various variations.

  Further, in the above embodiment, the notch 115 is provided in a part of the control board 113a around the rotation shaft 102a. However, the present invention is not limited to this, and may be applied to a control board 113a not provided with the notch 115 as shown in FIG. Further, in the above-described embodiment, the non-arrangement region 116 where the power module 110b is not disposed is provided in a part around the rotation shaft 102a of the rotating electrical machine 10, and the non-arrangement region 116 and the control board 113a are provided. The external connection terminal members 113u and 113v are arranged in correspondence with the non-arrangement region 116 and the cutout 115. However, the present invention is not limited to this, and the external connection terminal members 113u and 113v may be applied to those in which the non-arrangement region 116 and the notch 115 are arranged regardless of the position and presence thereof.

  Further, in the above-described embodiment, an example is given in which the rotor 102 of the rotating electrical machine 10 includes the rotor winding 102c that forms a magnetic pole when current flows. However, the present invention is not limited to this. That is, a magnet may be provided instead of the rotor winding 102c. In such a configuration, the slip ring 103 and the brush 104 are unnecessary, and accordingly, the field circuit IC 110c of the control device 11 is also unnecessary, so that the configuration can be simplified.

  In the above embodiment, two sets of stator windings 101 b provided in the stator 101 of the rotating electrical machine 10 are provided. That is, two sets of stator windings 101b are arranged with a predetermined electrical angle deviation with respect to one rotating electrical machine 10. However, the present invention is not limited to this, and may be applied to one in which two independent rotary electric machines 10 are provided. That is, it is assumed that two rotating electrical machines 10 are provided, and each rotating electrical machine 10 includes a housing 100, a stator 101, a rotor 102, a slip ring 103, a brush 104, and a rotation angle detection magnet. 105 may be provided. That is, one stator winding 101b may be arranged for each of the two rotating electrical machines 10. In this modification, it is preferable that the axis of the rotor 102 of one rotating electrical machine and the axis of the rotor 102 of the other rotating electrical machine are arranged coaxially.

  DESCRIPTION OF SYMBOLS 1 ... Control apparatus integrated rotary electric machine, 2 ... Power supply, 10 ... Rotary electric machine, 11 ... Control apparatus, 101b, 101b-1, 101b-1U, 101b-1V, 101b-1W, 101b -2, 101b-2X, 101b-2Y, 101b-2Z ... stator winding, 102a ... rotation axis, 110a ... rotation angle detection circuit IC, 110b, 110b-1, 110b-2, 110b -3: Power module, 110d: Microcomputer, 111a: Case member, 111b, 111c: Fixing member, 112a: Heat sink for power module, 112b: Heat sink for field circuit IC 112c ... Heat sink for microcomputer, 113a ... Control board, 113b, 113bL, 113bR ... Positive Bus bar, 113c, 113cL, 113cR ... negative electrode bus bar, 113u, 113v ... external connection terminal member, 114 ... resin member, 115 ... notch, 116 ... non-arrangement region, 117 ... Switching element, 118... Diode, 120... Capacitor, 122... First through hole, 124.

Claims (16)

A rotating electrical machine (10);
A control circuit (110d) for controlling the rotating electrical machine, a plurality of switching element modules (110b) disposed around the rotating shaft (102a) of the rotating electrical machine and controlled by the control circuit, and the switching element module A control device (11) having bus bars (113b, 113c) for connecting the power supply terminals of the power supply terminals to the external connection terminal members (113u, 113v),
A controller-integrated dynamoelectric machine (1) comprising:
The bus bar extends from the connecting portion (113k, 113l) side to the external connection terminal member toward the rotation axis and to the left and right around the rotation axis, and is connected to power supply terminals of the plurality of switching element modules, respectively. A controller-integrated dynamoelectric machine having a counterclockwise bus bar portion (113bL, 113cL) and a clockwise bus bar portion (113bR, 113cR) connected thereto.   2. The controller-integrated dynamoelectric machine according to claim 1, wherein the number of the switching element modules connected to the counterclockwise bus bar portion and the number of the switching element modules connected to the clockwise bus bar are the same.   Of the plurality of switching element modules, the switching element module (110b-2) located farthest from the connection portion around the rotation axis on the bus bar path is a power supply terminal connected to the counterclockwise bus bar portion The controller-integrated dynamoelectric machine according to claim 1, further comprising: a power supply terminal connected to the clockwise busbar portion. The bus bar includes a positive bus bar (113b) for connecting a positive power supply terminal of the switching element module to a first external connection terminal member (113u), and a negative power supply terminal of the switching element module (second external connection terminal member (113v)). A negative electrode bus bar (113c) to be connected to
The positive bus bar extends from the side of the connecting portion (113k) to the first external connection terminal member to the left and right around the rotation axis toward the rotation axis, and each of the positive electrode power supplies of the plurality of switching element modules. The control apparatus-integrated dynamoelectric machine according to any one of claims 1 to 3, further comprising a counterclockwise positive bus bar portion (113bL) and a clockwise positive bus bar portion (113bR) connected to the terminal.   The control device integrated type according to any one of claims 1 to 4, wherein each of the switching element modules is a module in which a plurality of sets of upper arm elements and lower arm elements constituting a switching circuit are included in the same resin-sealed package. Rotating electric machine.   The control device according to claim 1, wherein the bus bar is divided in a circumferential direction at a position opposite to a connection portion side with the external connection terminal member across a center of the rotation shaft. Integrated rotating electric machine.   The bus bar extends in parallel to a plane orthogonal to the rotation axis, and is formed and arranged symmetrically with respect to a line passing through the center of the rotation axis and extending in a direction orthogonal to the rotation axis. The control apparatus-integrated dynamoelectric machine according to any one of claims 1 to 6. The control circuit is mounted on a control board (113a) provided with a notch (115) in a part around the rotation axis,
The control apparatus-integrated dynamoelectric machine according to any one of claims 1 to 7, wherein the external connection terminal member is disposed in the notch or on a radially outer side of the notch. The bus bar has a first through hole (122) vacated in a radial direction with respect to the rotation axis, and a second through hole (124) vacated in an axial direction with respect to the rotation axis,
9. The controller-integrated rotation according to claim 1, wherein the external connection terminal member is inserted into one of the first through hole and the second through hole and connected to the bus bar. Electric.   The control device includes a resin case (111a) in which the bus bar is integrated, and a resin member (114) injected in a state where the control circuit and the switching element module are accommodated in the resin case. The control apparatus-integrated dynamoelectric machine according to any one of claims 1 to 9. The rotating electrical machine has two sets of stator windings (101b, 101b-1, 101b-2),
The counterclockwise bus bar portion extends counterclockwise from the connection portion side with respect to the rotating shaft and controls the energization of the pair of stator windings (101b-2). 110b-3) is connected to the external connection terminal member,
The clockwise bus bar portion extends clockwise from the connecting portion side with respect to the rotating shaft, and the switching element module (110b-1) controls energization of the remaining set of the stator windings (101b-1). , 110b-2) is connected to the external connection terminal member, and the controller-integrated dynamoelectric machine according to any one of claims 1 to 10.   The control device-integrated dynamoelectric machine according to any one of claims 1 to 11, wherein the control device includes a capacitor (120) interposed between power supply terminals of the switching element module. The capacitor is provided in an even number,
The even number of capacitors (120a-1, 120a-2, 120b-1, 120b-2) are symmetrically positioned at the same number on the left and right sides around the rotation axis across the connection portion between the bus bar and the external connection terminal member. The control device-integrated dynamoelectric machine according to claim 12, wherein the controller is integrated with the controller. Four or more capacitors are provided,
The controller-integrated rotating electrical machine according to claim 13, wherein the capacitor has a larger capacity as it is disposed closer to a connection portion between the bus bar and the external connection terminal member.   The controller-integrated rotating electrical machine according to claim 12, wherein both terminals of the capacitor are covered with resin. The bus bar includes a positive bus bar (113b) for connecting a positive power supply terminal of the switching element module to a first external connection terminal member (113u), and a negative power supply terminal of the switching element module (second external connection terminal member (113v)). A negative electrode bus bar (113c) to be connected to
The control apparatus-integrated dynamoelectric machine according to any one of claims 1 to 15, wherein the positive electrode bus bar and the negative electrode bus bar are arranged so that plate surfaces thereof face each other.

Images