JP5289420B2 - Resolver - Google Patents

Description

  The present invention relates to a resolver that detects a rotation angle of a rotor of a rotating electrical machine.

In recent years, variable reluctance type resolvers are widely used for applications such as detecting the rotation angle of rotors of motors, generators, etc., because they are less expensive and have a wider operating temperature range than the optical encoders. It has been.
When this resolver is used, the output winding of the resolver may be affected by an external magnetic field, and various measures have been taken to suppress this effect (for example, Patent Documents 1 and 2).

JP 2004-69374 A JP 2007-285856 A

  However, the resolvers of Patent Document 1 and Patent Document 2 are less susceptible to the influence of an external magnetic field, but may be susceptible to the influence of magnetic flux that flows from the sensor rotor side to the sensor stator side. was there.

  An object of the present invention is to solve the above-described problems, and is not easily affected by an external magnetic field, and is also affected by magnetic flux that swells from the sensor rotor side to the sensor stator side. The purpose is to obtain a difficult resolver.

The resolver according to the present invention includes a sensor stator core having a plurality of teeth formed in a radially inward direction and spaced apart in the circumferential direction, and an excitation winding and an output formed by winding a conductive wire around the teeth. A sensor stator including windings;
A resolver provided with a sensor rotor provided inside the sensor stator and having a plurality of salient poles protruding in the radially outward direction and spaced apart in the circumferential direction,
The number of teeth is M (M is a positive integer), the number of salient poles is N (N is a positive integer),
Furthermore, each said output winding makes the output winding part by which the said conducting wire was wound by the said teeth into one winding part group, or the output winding part by which the said conducting wire was wound by the same direction on each said tooth Are arranged continuously in the circumferential direction and connected to each other in series to form a one-phase output winding as one winding unit group,
When the number of winding portions is P,
P is an even number of 4 or more, and the values of (P / 2) and M ± (P / 2) are different from any of | M ± N ± 1 |, | N ± 1 |, and N The
The turn number distribution of the output winding has a (P / 2) order sine wave shape .

  According to the resolver of the present invention, when the number of winding part groups is P, P is an even number of 4 or more, and the value of (P / 2) and the value of M ± (P / 2) are | Since it is different from any of M ± N ± 1 |, | N ± 1 |, and N, the output winding is not easily affected by the magnetic field from the outside, and the influence of the magnetic flux that flows from the sensor rotor side to the sensor stator side Can be obtained.

It is sectional drawing which shows the alternating current generator motor for vehicles in which the resolver of Embodiment 1 of this invention was integrated. It is a block diagram which shows the resolver of 12 slots 8X of FIG. It is a figure which shows the external magnetic field with respect to the resolver of FIG. It is a figure which shows the spring magnetic flux with respect to the resolver of FIG. It is a block diagram when the resolver of FIG. 1 is eccentric. It is explanatory drawing which shows the coil | winding specification of the resolver of FIG. It is explanatory drawing which shows the coil | winding specification of a specification different from the resolver of FIG. It is explanatory drawing which shows the winding specification of a specification further different from the resolver of FIG. FIG. 9A is a comparison diagram showing the effect of the magnetic flux from the conventional example and the resolver in FIG. 1, and FIG. 9B is a comparison diagram showing the effect of the external magnetic field in the conventional example and the resolver in FIG. It is. 10A is an output voltage waveform diagram of the first output winding and the second output winding of the resolver in FIG. 1, and FIG. 10B is a conventional first output winding and second output. It is an output voltage waveform diagram of a winding. It is a block diagram which shows the resolver of 12 slots 2X of Embodiment 2 of this invention. It is explanatory drawing which shows the specification of the resolver of FIG. It is a block diagram which shows the resolver of 12 slots 4X of Embodiment 3 of this invention. It is explanatory drawing which shows the winding specification of the resolver of FIG. It is a figure which shows the list of the specification of each resolver containing the resolver of Embodiment 1-3 of this invention. It is sectional drawing which shows the alternating current generator motor for vehicles integrated with the control circuit part in which the resolver of this invention was incorporated. It is the figure which showed typically the positional relationship of each switching element of a 6-phase generator motor, and the resolver of Embodiment 1. FIG. It is the figure which showed typically another positional relationship of each switching element of a 6-phase generator motor, and the resolver of Embodiment 1. FIG. It is the figure which showed typically another positional relationship of each switching element of a 6-phase generator motor, and the resolver of Embodiment 1. FIG.

  Hereinafter, the resolver 1 according to each embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or equivalent members and parts will be described with the same reference numerals.

Embodiment 1 FIG.
1 is a cross-sectional view showing a vehicular AC generator motor (hereinafter abbreviated as a generator motor) that is a rotating electrical machine in which a resolver 1 according to Embodiment 1 of the present invention is incorporated. FIG. 2 shows the resolver 1 of FIG. FIG.
The generator motor includes a generator motor main body 10, a power circuit unit 30 that supplies current to the field winding 17, a control circuit unit (not shown) that controls driving of the power circuit unit 30, and the control circuit unit. The resolver 1 is electrically connected to.

  The generator motor main body 10 includes a housing 16 made of an aluminum front bracket 16a and a rear bracket 16b, and a pulley 24 fixed to the tip provided inside the housing 16 and rotatably supported by a front bearing 14. Shaft 13, rotor 11 fixed to this shaft 13 and having field windings 17, fans 20 attached to both side surfaces of this rotor 11, and shaft 13. The stator ring 18 is fixed by being sandwiched between the front ring 16a and the rear bracket 16b, and the slip ring 21 that supplies the slip ring 21 and the front end surface thereof slides on the slip ring 21 and the brush 22 accommodated in the brush holder 23. And a stator 12 comprising a stator winding 19.

  The power circuit unit 30 is electrically connected to the DC-AC mutual conversion circuit 31 electrically connected to the stator winding 19 and the brush 22 and electrically connected to the field winding 17 and the field. And a field current switching circuit 32 for controlling a current to the magnetic winding 17.

The resolver 1 includes a sensor stator 51 and a sensor rotor 5 having a salient pole 6 that is fixed to the shaft 13 and whose gap permeance changes sinusoidally with respect to the angle.
The sensor stator 51 is composed of a sensor stator core 2 having a plurality of teeth 3 formed by laminating thin silicon steel plates and spaced apart in the circumferential direction, and a plurality of times of conducting wires on the teeth 3 whose tips protrude from the inner diameter side. The sensor coil 4 is wound and mounted.
The sensor coil 4 includes an excitation winding 4a in which a conducting wire is wound on the innermost diameter side of each tooth 3, and a two-phase first output winding in which a conducting wire is wound on the outer diameter side of the excitation winding 4a. 4b and a second output winding 4c.

  A separate control circuit unit away from the housing 16 is configured to control the control board, the electronic components mounted on the control board to control the driving of the field current switching circuit 32, and the detection signal of the resolver 1 mounted on the control board. A sensor converter for converting the signal into a signal.

Next, the case where the generator motor of the said structure is used as an electric motor is demonstrated.
When the engine is started, a direct current from a battery (not shown) is converted into a three-phase alternating current by the direct current alternating current conversion circuit 31 via the brush 22 and supplied to the stator winding 19. Further, the field current is supplied to the field winding 17 through the battery (not shown), the brush 22 and the slip ring 21 to generate a magnetic flux, and the rotor 11 has N and S poles alternately attached. Magnetized. The stator winding 19 and the rotor 11 act as electromagnets, and the rotor 11 rotates with the shaft 13 within the stator 12.
The rotational force of the shaft 13 is transmitted to the engine output shaft (not shown) via the pulley 24, and the engine is started.

On the other hand, in the resolver 1 fixed to the shaft 13, the sensor stator 51 is electrically connected to the control circuit unit, and the output signal of the sensor stator 51 is the first output winding 4b and the second output winding. It is supplied to the sensor converter mounted on the control board via each lead 4c.
In the sensor converter, it is converted into an angle signal, and this angle signal is supplied to the control circuit unit, and the DC / AC mutual conversion circuit 31 is driven by the signal from this control circuit unit, and the current to the stator winding 19 is changed. In addition, the field current switching circuit 32 is driven to control the current to the field winding 17.

Next, a case where the generator motor having the above configuration is used as a generator will be described.
A magnetic flux is generated from the battery via the brush 22, brush 22, and slip ring 21 to generate magnetic flux, and the rotor 11 is alternately magnetized with N and S poles. On the other hand, since the pulley 24 is driven by the engine and the rotor 11 is rotated by the shaft 13, a rotating magnetic field is applied to the stator winding 19, and an electromotive force is generated in the stator winding 19. This alternating electromotive force is rectified to direct current by the direct current alternating current mutual conversion circuit 31 and charged to the battery.

Next, the influence of the external magnetic field and the magnetic flux generated on the resolver 1 of the generator motor will be described.
In the resolver 1, one of the noises affecting the detection angle error is an external magnetic field due to switching noise generated in the power circuit unit 30.
When the generator motor is driven, the current is switched to direct current or alternating current by turning on and off the switching element of the DC / AC mutual conversion circuit 31 of the power circuit unit 30 such as a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). When the current flowing through the power circuit unit 30 changes abruptly, the magnetic flux changes greatly. At this time, the magnetic flux represented by the following formula penetrates the resolver 1, and the magnetic flux changes due to a change in current.

In the above equation, B: magnetic flux density [Wb / m ² ], C: closed circuit in space, P: permeance [H], φ: magnetic flux [Wb], R: position of magnetic field [m], I: Current [A], S: Conductor cross-sectional area [m ² ], μ ₀ : Vacuum permeability [H / m], N: Number of conductor turns of each tooth 3, l: Current element position, V: Voltage [ V].

Here, since the component magnetic flux in the axial direction of the resolver 1 is not linked to the sensor coil 4, no voltage is generated in the sensor coil 4, but penetrates in a direction perpendicular to the axis of the resolver 1 as shown in FIG. Since the component magnetic flux to be linked to the sensor coil 4, a voltage is generated in the sensor coil 4.
Moreover, the circumferential direction distribution of the magnetic flux interlinking with each tooth 3 is sinusoidal.
Since the voltage which becomes the noise of the resolver 1 is proportional to the sum total of “linkage magnetic flux × number of turns of the conductive wire of each tooth 3”, it can be expressed by the following equation.

  In the above equation, Vnoise: noise voltage [V], φ: magnetic flux [Wb], i: teeth number, θi: phase in each tooth 3, T: number of turns of each tooth 3, L: output winding order It is.

Note that the above equation is an orthogonal function, and it can be seen that when the output winding order L is 1, the noise voltage does not become zero.
Of the conductive wires wound around the teeth 3 of the sensor stator core 51, one output winding portion is used as one winding portion group, or the winding direction of the conductive wires is the same and is adjacent to a plurality of circumferential directions. The output windings arranged in series and connected in series to each other are defined as one winding unit group.
And if the number of winding part groups is P,
L = (P / 2) = 1 That is, when the output winding order L is 1 and P = 2, the winding distribution becomes a first-order sine wave, the noise voltage does not become zero, and switching noise is generated. Will do.

In addition, as another noise, there is an influence due to the magnetic flux that has erupted.
A current is passed through the field winding 17 in order to magnetize the rotor 11 when the generator motor is driven. The rotor magnetic flux generated by the field current is transmitted through the shaft 13 which is a magnetic material as shown by the arrow A in FIG. Thus, the sensor rotor 5 leaks radially to the sensor stator 51.
Since this leakage magnetic flux is linked to the sensor coil 4 as shown by the arrow b in FIG. 4, it becomes noise when it is not canceled by the winding specification.

The voltage that becomes the noise of the resolver 1 is also proportional to the sum of “linkage magnetic flux × number of turns of the conductive wire of each tooth 3”, similarly to the switching noise generated by the external magnetic field.
However, if the number of turns is + for right-handed winding, it will be-for left-handed winding.

  Here, Vnoise: noise voltage [V], φ: magnetic flux [Wb], i: teeth number, θi: phase in each tooth 3, T: number of turns of each conductor wire 3, L: output winding order F: origin Magnetic force [A], P: Permeance [H].

  Since the magnetomotive force is uniform in the circumferential direction, the above formula is an orthogonal function, so the space | M ± N | next magnetic flux and L = () due to the influence of the permeance pulsation between the teeth 3 of the sensor stator core 2 and the salient poles 6 of the sensor rotor 5 If P / 2) matches, a noise voltage is generated. Here, M represents the number of slots, and N represents the number of salient poles 6 of the sensor rotor 5. || is a symbol representing an absolute value, and decoding is arbitrary. This is also described in Patent Document 1.

Furthermore, when considering the influence of noise due to the magnetic flux, it is necessary to consider the eccentricity caused by the manufacturing errors of the sensor stator 51 and the sensor rotor 5.
If the center axis of the sensor stator 51 and the center axis of the sensor rotor 5 are the same as shown in FIG. 2, an ideal voltage waveform is output, but if there is an eccentricity as shown in FIG. The magnetic flux is superimposed and a noise voltage is generated.

The resolver 1 according to the first embodiment incorporated in the generator motor of FIG. 1 suppresses the generation of a noise voltage due to the external magnetic field and the spring magnetic flux with respect to the resolver 1 and ensures high detection accuracy.
That is, among the windings in which the conducting wires are wound around the teeth 3 of the sensor stator core 2, the winding directions of the conducting wires of the respective output winding portions are the same and arranged in the circumferential direction and are connected in series with each other. When each output winding part is one winding part group and the number of winding part groups is P, the noise voltage is zero, that is, external by setting the number P of winding part groups to an even number of 4 or more. The influence of the magnetic field from can be reduced.

  As for the magnetic flux, a magnetic flux having the same spatial order as the number N of salient poles 6 of the sensor rotor 5 is generated, and this is not picked up by the first output winding 4b and the second output winding 4c. Therefore, the spatial order (P / 2) of the distribution of the number of turns of the output winding in consideration of the winding direction and the equivalent order (M ± (P / 2)) are different from N. The number of turns of the conductor is set to.

When the magnetic flux and the eccentricity exist at the same time, the space | M ± N ± 1 | is affected by the permeance pulsation between the teeth 3 of the sensor stator core 2 and the salient poles 6 of the sensor rotor 5 and the eccentricity that is a manufacturing error. The next magnetic flux, space | N ± 1 | next magnetic flux is generated, but it is necessary to prevent this from being picked up by the output windings 4b and 4c.
Therefore, (P / 2) and the equivalent order (M ± (P / 2)) are different from both | M ± N ± 1 | and | N ± 1 |.

Further, the number Q of the excitation windings 4a is set to an even number of 4 or more as in the case of P, which is the number of winding unit groups, so that the noise voltage is zero, that is, the influence of an external magnetic field is reduced. It becomes possible.
Similarly, since a magnetic flux with the same spatial order as the number N of the salient poles 6 of the sensor rotor 5 is generated, the magnetic flux of the conductor is prevented from being picked up by the output windings 4b and 4c. The number of turns so that the spatial order (Q / 2) and the equivalent order (M ± Q / 2) of the turn number distribution of the conductors of the output windings 4b and 4c considering the winding direction are different from N. Is set.

  Similarly, when the magnetic flux and the eccentricity exist at the same time, a space | M ± N ± 1 | next magnetic flux and a space | N ± 1 | next magnetic flux are generated, which are output winding 4b, In order to prevent 4c from being picked up, (Q / 2) and its equivalent order (M ± (Q / 2)) are different from both | M ± N ± 1 | and | N ± 1 | Yes.

  Next, the respective winding distributions of the excitation winding 4a, the first output winding 4b, and the second output winding 4c in the resolver 1 of FIG. 1 will be described with reference to FIG.

The winding distribution of the first output winding 4b is distributed in a sine wave shape.
That is, in the first output winding 4b, the winding direction of the conducting wire is the same, and the three first output windings 4b1 are arranged adjacent to each other in the circumferential direction and are connected in series with each other. One winding portion group 1-1 is formed, and a conductive wire is continuously wound in a direction opposite to the winding portion group 1-1, and three first output winding portions 4b1 are adjacent in the circumferential direction. Are arranged in series and connected to each other in series to form a separate winding portion group 1-2.
Similarly, a winding part group 1-3 and a winding part group 1-4 are configured.
And the 1st output winding part 4b1 in each middle of each winding part group 1-1, 1-2, 1-3, 1-4 has the 1st output of both sides with the same number of turns of conducting wire. The number of turns of the conductive wire is larger than that of the winding portion 4b1.

In the winding distribution of the second output winding 4c, the two second output winding portions 4c1 are arranged adjacent to each other in the circumferential direction, are in series with each other, and the number of turns of the conducting wire is the same. A winding part group 2-1 is formed, and a conductor is wound in the opposite direction, jumping over this winding part group 2-1 and one slot, and arranged adjacent to each other in the circumferential direction. Separate winding part groups 2-2 are formed in series and having the same number of turns of the conductive wires.
Similarly, a winding part group 2-3 and a winding part group 2-4 are configured.

In the resolver 1 of the first embodiment, the number M of the teeth 3 of the sensor stator core 2 is 12, the number N of the salient poles 6 of the sensor rotor 5 is 8, the number P of the winding portions is 4, and the excitation winding 4a Since the number of poles Q is 12,
M ± P / 2 = 12 ± 4/2 = 10, 14 and M ± Q / 2 = 12 ± 12/2 = 6, 18.
Since these values do not coincide with | M ± N ± 1 | = | 12 ± 8 ± 1 | = 3, 5, 19, 21, | N ± 1 | = | 8 ± 1 | = 7, 9 The wires 4b and 4c are not easily affected by an external magnetic field, and are affected by magnetic flux that swells from the sensor rotor 5 side to the sensor stator 51 side, magnetic flux that flows from the sensor stator 51 side to the sensor rotor 5 side, and manufacturing variations. A difficult resolver 1 can be obtained.
Further, since the winding distribution of the first output winding 4b is distributed in a (P / 2) -order sine wave shape, the harmonics contained in the voltage signal of the first output winding 4b are reduced. Therefore, a highly accurate resolver 1 with a smaller angle error can be obtained.

The inventor of the present application considers the influence of the respective spilled magnetic flux in the conventional example (when the winding distribution order L is 1 and the winding part group P is 2) and the winding specifications of the resolver 1 of the first embodiment. It was determined by experiment.
FIG. 9A is a comparison diagram showing experimental results at this time.
Similarly, the influence of each external magnetic field in the conventional example and the winding specification of the resolver 1 was obtained by experiments.
FIG. 9B is a comparison diagram showing experimental results at this time.
In FIGS. 9A and 9B, the vertical axis indicates the detection angle error.
From this experimental result, it was found that the detection angle error due to the spilled magnetic flux was reduced by about 50% in the resolver 1 of the first embodiment showing the winding distribution of FIG. .
Similarly, the detection angle error due to the external magnetic field is reduced to about (1/3) of the resolver 1 of the first embodiment showing the winding distribution of FIG. 6 as compared with the conventional one. I understand.

Similarly, the inventor of the present application is the resolver 1 of the first embodiment showing the winding distribution of FIG. 6 and the conventional example (when the output winding order L is 1 and the winding section group P is 2). The output voltage waveform diagram of was obtained by experiment.
FIG. 10A is an output voltage waveform diagram of the first output winding 4b and the second output winding 4c of the resolver 1, and FIG. 10B is a conventional first output winding and second output. It is an output voltage waveform diagram of a winding.
From the result of this experiment, the voltage waveform of the resolver 1 of the first embodiment shown in FIG. 10 (a) outputs a clean sine wave without disturbance, whereas the conventional waveform shown in FIG. 10 (b). In the voltage waveform of FIG. 5, the undulation occurs because the center of the amplitude is synchronized with the noise waveform.

  Note that the winding distribution of the first output winding 4b shown in FIG. 6 is distributed in a sine wave form, but as shown in FIG. -1, 1-2, 1-3, 1-4 Even if the number of turns of the conducting wire of each of the first output windings 4b1 is the same, the detection angle error due to the magnetic flux is the conventional one The detection angle error due to the external magnetic field is also reduced as compared with the conventional one.

  For example, as shown in FIG. 8, the first output winding 4b includes first output winding sections in the middle of the respective winding section groups 1-1, 1-2, 1-3, and 1-4. 4b1 has a smaller number of turns of the conductor than the first output windings 4b1 on both sides where the number of turns of the conductor is the same, but this also has the same effect as that of FIG.

Embodiment 2. FIG.
FIG. 11 is a block diagram showing a resolver 1 according to Embodiment 2 of the present invention. FIG. 12 is a winding distribution diagram of the resolver 1. The resolver 1 has 12 slots 2X, and teeth of the sensor stator core 2 are shown. The number M is 12, the number N of the salient poles 6 of the sensor rotor 5 is 2, the number P of the winding part groups is 8, and the number Q of the exciting windings 4a is 12.
In this embodiment, the first output winding 4b includes one winding unit group 1-1, 1-3, 1-5, and 1-7 each having the same number of turns and winding direction of the conductor. The first output winding portion 4b1 is configured. Winding portion groups 1-2, 1-4, and 1-5 of the first output winding 4b, in which the winding direction of the conducting wire is opposite to the winding portion groups 1-1, 1-3, 1-5, and 1-7. In 1-6 and 1-8, two first output windings 4b1 each having the same number of turns and winding direction of the conducting wire are arranged adjacent to each other in the circumferential direction and are connected in series. Configured.

  Further, the second output winding 4c has one first output in which the winding group 2-1, 2-3, 2-5, 2-7 have the same number of turns and winding direction of the conducting wire, respectively. The winding part group 2-2, 2-4, 2-6, and 2-8 that are constituted by the winding part 4 c 1 and have the same number of turns and winding directions of the second output winding 4 c. It is composed of one first output winding portion 4c1. The winding direction of the conducting wire is opposite between the winding part groups 2-1, 2-3, 2-5, 2-7 and the winding part groups 2-2, 2-4, 2-6, 2-8. is there.

In the resolver 1 of the second embodiment,
M ± P / 2 = 12 ± 8/2 = 16,8 and M ± Q / 2 = 12 ± 12/2 = 6,18.
These numbers are not consistent with | M ± N ± 1 | = | 12 ± 2 ± 1 | = 9, 11, 13, 15, | N ± 1 | = | 2 ± 1 | = 1,3 The resolver 1 is obtained in which the output windings 4b and 4c are not easily affected by the magnetic field from the outside, the magnetic flux that flows from the sensor rotor 5 to the sensor stator 51, and the eccentricity of the sensor rotor 5 due to manufacturing errors. Can do.

Embodiment 3 FIG.
FIG. 13 is a block diagram showing a resolver 1 according to a third embodiment of the present invention. FIG. 14 is a winding distribution diagram of the resolver 1. The resolver 1 has 12 slots 4X and includes teeth of a sensor stator 51. The number M is 12, the number N of the salient poles 6 of the sensor rotor 5 is 4, the number P of the winding part groups is 4, and the number Q of the exciting windings 4a is 12.
In the resolver 1 of the third embodiment,
M ± P / 2 = 12 ± 4/2 = 10, 14 and M ± Q / 2 = 12 ± 12/2 = 6, 18.
These numbers are not consistent with | M ± N ± 1 | = | 12 ± 4 ± 1 | = 7, 9, 15, 17, | N ± 1 | = | 4 ± 1 | = 3,5 The resolver 1 is obtained in which the output windings 4b and 4c are not easily affected by the magnetic field from the outside, the magnetic flux that flows from the sensor rotor 5 to the sensor stator 51, and the eccentricity of the sensor rotor 5 due to manufacturing errors. Can do.

  FIG. 15 shows the resolver 1 in which the number M of the teeth 3 of the sensor stator core 2, the number N of salient poles 6 of the sensor rotor 5, the number P of winding portions, and the number Q of poles of the excitation winding 4a are various. A list showing combinations (including those in the first to third embodiments), and even these combinations can obtain the same effects as those in the first to third embodiments.

In each of the above-described embodiments, the resolver 1 is described in which the control circuit unit is incorporated in the generator motor provided separately from the housing 16. However, the control circuit unit is incorporated in the generator motor integrated with the housing 16. The present invention can also be applied to the resolver 1.
FIG. 16 is a cross-sectional view showing the generator motor.
A control circuit section 40 shown in FIG. 16 is fixed to the side surface of the rear bracket 16b, and a control board 41 that is electrically connected to the power circuit section 30 via a connector 34. An electronic component (not shown) that controls the magnetic current switching circuit 32 and a sensor converter (not shown) that is mounted on the control board 41 and converts the detection signal of the resolver 1 into an angle signal are provided.

In the first to third embodiments, the three-phase generator motor has been described. However, the present invention can also be applied to a six-phase generator motor.
17, 18, and 19 show each switching that constitutes the DC / AC mutual conversion circuit 31 of each phase (U phase, V phase, W phase, X phase, Y phase, Z phase) of the six-phase generator motor. It is the figure which showed typically the positional relationship of the element 33a, 33b, 33c, 33d, 33e, 33f and the resolver 1. FIG.
FIG. 17 shows an example in which switching elements 33a, 33b, 33c, 33d, 33e, and 33f are arranged at equal intervals around the resolver 1. FIG. 18 shows switching elements 33a, 33b, and 33c on both sides of the resolver 1, respectively. In this example, the switching elements 33d, 33e, and 33f are linearly arranged.
FIG. 19 shows an example in which switching elements 33a, 33b, 33c, 33d, 33e, and 33f are arranged at equal intervals around the resolver 1 except for a part thereof.

Also in the case of this generator motor, the magnetic field generated from the switching elements 33a, 33b, 33c, 33d, 33e, and 33f passes through the resolver 1, and the detection angle accuracy decreases.
However, if the winding specifications of the output windings 4b and 4c are the same as those in the first to third embodiments, the influence on the penetration of the external magnetic field into the resolver 1 from various directions can be reduced, and detection It is possible to prevent a decrease in angular accuracy.

  Note that the arrangement of the switching elements 33a, 33b, 33c, 33d, 33e, and 33f can provide the same effect with respect to arrangements other than those shown in FIGS. 17 to 19, and the number of phases is six. The same effect can be obtained not only in the generator motors of other phases.

  The present invention can also be applied to the resolver 1 in which the sensor rotor 5 is attached to the shaft of the electric motor and the shaft of the generator.

  1 resolver, 2 sensor stator core, 3 teeth, 4 sensor coil, 4a exciting winding, 4b output winding, 4b1 output winding, 4c output winding, 4c1 output winding, 5 sensor rotor, 6 salient pole, 7 Resolver, 10 Generator motor body, 11 Rotor, 12 Stator, 13 Shaft, 14 Front bearing, 15 Rear bearing, 16 Housing, 16a Front bracket, 16b Rear bracket, 17 Field winding, 18 Stator core, 19 Fixed Sub winding, 20: fan, 21 slip ring, 22 brush, 23 brush holder, 24 pulley, 30 power circuit section, 31 DC / AC mutual conversion circuit, 32 field current switching circuit, 33a, 33b, 33c, 33d, 33e 33f Switching element, 34 connector, 40 Control circuit portion, 41: control board, 51 sensor stator.

Claims (8)

A sensor stator core having a plurality of teeth projecting radially inwardly and spaced apart in the circumferential direction; and a sensor stator including an excitation winding and an output winding formed by winding a conductive wire around the teeth; ,
A resolver provided with a sensor rotor provided inside the sensor stator and having a plurality of salient poles protruding in the radially outward direction and spaced apart in the circumferential direction,
The number of teeth is M (M is a positive integer), the number of salient poles is N (N is a positive integer),
Furthermore, each said output winding makes the output winding part by which the said conducting wire was wound by the said teeth into one winding part group, or the output winding part by which the said conducting wire was wound by the same direction on each said tooth Are arranged continuously in the circumferential direction and connected to each other in series to form a one-phase output winding as one winding unit group,
When the number of winding portions is P,
P is an even number of 4 or more, and the values of (P / 2) and M ± (P / 2) are different from any of | M ± N ± 1 |, | N ± 1 |, and N The
The resolver characterized in that the number of turns of the output winding is a (P / 2) -order sine wave .   When Q is the number of poles of the exciting winding, Q is an even number of 4 or more, and the value of (Q / 2) and the value of M ± (Q / 2) are | M ± N ± 1 | The resolver according to claim 1, which is different from any of | N ± 1 | and N. The resolver according to claim 1 or 2 , wherein the M is 12.   The resolver according to claim 2, wherein the N is 8, the P is 4, and the Q is 12. 4. The resolver according to claim 2, wherein the N is 2, the P is 8 , and the Q is 12.   The resolver according to claim 2, wherein the N is 4, the P is 4, and the Q is 12. 4. The sensor rotor, a resolver according to any one of claim 1 to 6, characterized in that it is fixed to the shaft of the rotary electric machine. The resolver according to claim 7 , wherein the rotating electric machine is integrated with a control circuit unit that controls driving of a power circuit unit that supplies current to the field winding.

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