JPH09182211A - Drive for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To downsize a drive by arranging two rotary machines concetrically and to accomplish a rotor structure capable of generating high torque with the small size maintained. SOLUTION: Made up of a first rotor 1210, a second rotor 1310 and a stator 1410, A T-S converter 1000, which outputs and controls a given driving torque and revolution, constitutes a rotary machine which controls the revolutions between the first rotor 1210 and the second rotor 1310 and another rotary machine which controls the driving torque between the second rotor 1310 and the stator 1410. In addition, a drive is downsized by making up the two rotatary machines of reluctance motors and arranging and unifying them concentricity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle drive system, and more particularly to a vehicle drive system suitable for a so-called hybrid vehicle which is drive-controlled by an internal combustion engine and a motor.

[0002]

2. Description of the Related Art Conventionally, as described in Japanese Patent Laid-Open No. 7-15805, an electromagnetic coupling for converting the rotational speed of power generated by an internal combustion engine and an auxiliary electric motor for controlling torque are used to separate an internal combustion engine and an electric machine. By making it a hybrid, it has realized fuel efficiency and low pollution of the power engine.

However, this system requires two independent rotating machines, resulting in an increase in system weight and difficulty in realizing fuel efficiency. Further, this function is to be replaced by a torque converter and a transmission of a conventional vehicle, and it is desirable to mount two rotary machines in this space, but it is practically difficult.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention aims at downsizing by arranging these two rotating machines concentrically, and for a vehicle that realizes a rotor structure capable of generating a high torque while maintaining a small size. An object is to provide a drive device.

[0005]

In order to achieve the above-mentioned object, the present invention has the structure of claim 1
The inductance of the first or the second coil is the first
And the second rotor is configured to periodically change due to the relative rotation between the second rotor and the relative rotation between the stator and the second rotor. A difference in energy occurs due to the inductance at a relative position with respect to the coil, and a rotational force (torque) that tends to shift to a relative position where the energy is low acts. This is the reluctance torque, and if the rotor is constructed so that the inductance changes periodically, it is possible to construct a rotating machine using only magnetic materials without using field windings or magnets in the rotor.

Further, if such a rotor is employed in a rotating machine having a double structure in which the rotors are arranged concentrically, the intermediate rotor can be simply constructed, so that the difference in inner and outer diameters of the intermediate rotor can be made small. Since the winding space can be increased without reducing the outer diameter, the efficiency can be increased or the size can be reduced. Further, as described in claim 2, the reluctance torque can be efficiently output by configuring the periodical change of the inductance of the first or second coil such that there is one cycle per magnetic pole pitch. .

Further, the change amount of the inductance is expressed by M
MIN value (Lmin) for AX value (Lmax)
However, by configuring such that Lmax> 1.5Lmin, it is possible to generate sufficient acting torque enough to rotate the rotating machine. Also, the first of the second rotor
Of at least one of the second magnetic field and the second magnetic field is made of a ferromagnetic material having a magnetic permeability μ of 2000 or more.
Since the field can be formed only by a high ferromagnetic material, the thickness of the second rotor can be made as thin as possible, the size can be reduced, and the cost can be reduced because no magnet is used.

According to the fifth aspect, the first or second field is punched out from the electromagnetic steel sheets and laminated to form an integral structure, which is easy to manufacture, has excellent productivity, and has a simple structure. It becomes possible to form a field. Further, by providing at least one of the first field and the second field of the second rotor with a magnet, the reluctance torque can be utilized together with the magnetic flux generated in the magnet, and the efficient reluctance torque can be utilized. A motor can be configured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of the present invention. Reference numeral 100 denotes an engine such as an internal combustion engine.
Is a torque that receives the output of the engine 100 as an input and appropriately controls the drive torque and the rotational speed so as to correspond to the load output (traveling drive output) configured by the vehicle drive wheels and the like, and outputs the output toward the load output. A drive device that functions as a speed converter, and adjusts the torque between the input / output and a rotation speed adjustment unit 1200 that adjusts the rotation speed between the input and output that is internally configured by a pair of coils and field poles. It has a torque adjustment unit 1400.

This torque-speed converter will be abbreviated as TS converter 1000 below. 2
00 is the rotation speed adjusting unit 120 of the TS converter 1000.
This is an inverter that controls energization of 0, and in the present embodiment, the rotation speed adjustment unit 1200 is configured by a three-phase rotating machine. Therefore, the switching operation of the inverter 200 causes a three-phase AC current to rotate. Energization is controlled toward the adjustment unit 1200.

Reference numeral 400 is also the TS converter 1000.
Is an inverter that controls the energization of the torque adjusting unit 1400, and energizes the three-phase AC current as in the rotation speed adjusting unit 1200. Reference numeral 500 denotes an ECU that is provided in the TS converter 1000 and controls the inverters 200 and 400 based on internal information such as a rotation sensor and external information. Reference numeral 600 denotes a DC battery used in a general vehicle or the like. Reference numeral 700 denotes a driving wheel constituted by a vehicle tire or the like as a load output.

Engine 100 and TS converter 100
Between 0 and 0, a joint portion, a speed reducer, and the like, which are widely used in a general internal combustion engine-driven vehicle, are configured, and T-S
Joints, differential gears, etc. are similarly provided between the converter 1000 and the drive wheels 700, but are not shown.
Next, a detailed structure of the TS converter 1000 will be described.

An output shaft 110 for transmitting and outputting the rotational driving force of the engine 100 is connected to a shaft-shaped input shaft 1213 located substantially at the center of the TS converter 1000 via a joint portion, a speed reducer, etc., which are not shown. The rotary drive force of the engine 100 is directly transmitted to the input shaft 1213. In this embodiment, the output shaft 110 and the input shaft 121
3 is arranged linearly on the same axis, but it is also possible to arrange the output shaft 110 and the input shaft 1213 at an angle in the axial direction through a joint or the like in accordance with the mounting space of the vehicle. is there.

The T-S converter 1000 constitutes one housing by connecting three housings 1710, 1720, 1730, and the coupling portions of the housings are mutually connected so that their positioning is easy. It has a cylindrical fitting portion and is configured to be connected by a plurality of bolts. Housing 171
In the internal space formed by 0, 1720, and 1730, the input shaft 121 is provided so as to configure a main rotating electrical machine section of the present drive device.
3, a first rotor 1210 that is a first rotor that is integrally provided, a second rotor that is a second rotor, and a stator 1410 that corresponds to a stator are provided.

The input shaft 1213 has a plurality of outer peripheral portions having different diameters, and is provided with a first rotor 1210, a bearing, a slip ring for supplying power, a rotation sensor and the like. The first rotor 1210 is composed of a rotor winding 1211 that forms a rotating magnetic field and a rotor core 1212, and the rotor core 1212 is press-fitted and fixed to the outer peripheral surface having the largest diameter among the outer peripheral surfaces of the input shaft 1213.

The input shaft 1213 is formed such that its diameter gradually decreases from the outer peripheral surface into which the rotor core 1212 is press-fitted toward the engine 100 side, and the outer diameter of the input shaft closest to the engine side is a bearing. 1514 is disposed and the outer ring of the bearing 1514 is attached to the housing 173.
By supporting and fixing to 0, one end of the input shaft 1213 is rotatably supported to the housing 1730.

On the outer periphery of the first rotor 1210, a cylindrical second rotor 1310 is arranged opposite to the first rotor 1210 so as to be rotatable relative to the first rotor 1210 and rotatably on the same axis. There is. The second rotor 1310 has a rotor yoke 1311 made of a plurality of laminated electromagnetic steel plates forming field poles made of a ferromagnetic material on an inner peripheral surface and an outer peripheral surface thereof, a pressure plate 1335, and a frame 13 supporting the rotor yoke.
After the rotor yoke 1311 is fastened and fixed by sandwiching the rotor yoke 1311 between the pressure plate 1335 and the frame 1332 by a plurality of bolts 1333 (not shown) that are formed by penetrating the rotor yoke 1311, the rotor yoke 1311 is fixed to the pressure plate 1335 and the rotor yoke 1311. The frame 13 is formed by a plurality of bolts 1334 that are inserted therethrough.
31, pressure plate 1335, rotor yoke 1311,
The second rotor 1310 is configured by fastening and fixing the frame 1332 so as to sandwich it.

The output shaft 1 is integrally formed with the frame 1332.
340 is formed, and the output shaft is a housing 1720.
It is rotatably supported via a bearing 1513. One end of the output shaft 1340 projects to the outside from the housing 1720 and is connected to the drive wheels 700 via a differential gear (not shown) or the like. Frame 1
332, in the housing 1720, a portion of the vicinity of the rotation axis thereof projects toward the first rotor 1210 side, one end of the input shaft 1213 is inserted therein, and the input shaft 1213 is inserted through the bearing 1511. Is rotatably supported by the frame 1332.

The coil end of the rotor winding 1211 wound around the rotor core 1311 projects axially more than the axial end surface of the rotor core 1311. Inside the projecting portion of the coil end of the rotor winding 1211, A space is formed on the lateral side of the end surface of the rotor core 1212, and a space is formed in this space portion with respect to the axis of the first rotor 1210 and the second rotor 1310.
1511 for rotatably supporting the frame 1332 of
Is placed so that the second rotor 131
A configuration is achieved in which the axial length of the entire apparatus is made as small as possible without causing the 0 rotation support portion to project outward in the axial direction. Bearings 1511, 15 of the first rotor 1210
12 fixed surface and the first facing the rotor yoke 1311
The outer peripheral surface of the rotor 1210 is machined at the same time so that the coaxial surface is accurately formed.

The axial end surface of the rotor yoke 1311 is substantially at the same position as the axial end surface of the rotor core 1212 of the first rotor 1210, and therefore the rotor yoke 1
The frame 1332 connected to the end face of 311 is cup-shaped toward the end face of the second rotor 1310 from its axial center portion so as to avoid the coil end of the rotor winding 1211 protruding from the end face of the rotor core 1212. It has a shape that extends.

The other frame 1331 supporting the rotor yoke 1311 has a plurality of cylindrical outer peripheral surfaces having different diameters, and the diameter thereof is gradually reduced toward the engine 100 side. The smallest diameter portion is arranged on the outer peripheral surface of the input shaft 1213 via a minute gap to prevent foreign matter from entering, and a bearing 1510 is fitted to the outer peripheral surface of the small diameter portion. And the outer ring of the bearing 1510 is the housing 171.
It is fixed to a plate portion 1710a extending from 0. Therefore, the second rotor 1310 is connected to the frame 13
31 and 1332 are housings 1710 and 172, respectively.
0 is rotatably supported via bearings 1510 and 1513, and each bearing 151
Since 0 and 1513 are both arranged coaxially with respect to the input shaft, the second rotor is also rotatably supported coaxially with respect to the input shaft 1213.

Further, the frame 1331 and the plate portion 17
A rotation sensor 1912 composed of a resolver is provided in an axial space between the rotation sensor 1912 and 10a.
One is fixed to the frame 1331 and the other is fixed to the plate portion 1710a, so that the second rotor 13
The number of rotations of 10 can be detected. A detection signal from the rotation sensor 1912 is output to the ECU 500 and used for rotation control of the second rotor 1310.

The frame 1331 has a bearing 1510.
At a position closer to the first rotor 1210 side than the input shaft 12
13 is rotatably supported via a bearing 1512. The stator 1410 is arranged so as to face the cylindrical outer peripheral portion of the rotor yoke 1311. The stator 1410 is composed of a stator core 1412 and a winding 1411.
The winding 1 is arranged so as to be directly fixed to the cylindrical inner peripheral surface of the housing 1720, and forms a rotating magnetic field.
411 is wound around the stator core 1412. With such a configuration, the stator 1410 also includes the first rotor 121.
0 and the second rotor 1310 are arranged coaxially with each other, as in the case where they are arranged coaxially with each other.

Here, the outer peripheral surface of the stator core 1412, which contacts the inner peripheral surface of the housing 1720, and the rotor yoke 13.
By coaxially machining the inner peripheral surface of 11 facing the outer peripheral surface, the coaxial is created with high precision. Similarly, the inner peripheral surface of the housing 1720 for fixing the stator core 1412 and the bearing fixing surface are also coaxial. Stator 1
The wiring of 410 penetrates through a plate portion 1710a formed to project inward from the housing 1710, further penetrates through a wiring fixing plug 1711 fixed to the outer peripheral cylindrical portion of the housing 1710, and is wired to the outside.
It is electrically connected to 00.

In the first rotor 1210, the lead portion 1660, which serves as a wiring for each of the three phases from the end surface of the rotor core 1212 on the engine 100 side, is embedded in the input shaft 1213 and is parallel to the axial direction of the input shaft. Placed in 3
Each of them is connected to one slip ring 1630. Each of the slip rings 1630 is provided with an insulating portion 1650 such as a mold therebetween so as not to be electrically connected to each other, and is insulated from the input shaft 1213 and the like.

Brushes 1620 are in contact with the respective slip rings 1630 so that their tips slide on the slip rings 1630.
0 is pressed toward the slip ring 1630 from the rear by the spring 1640. These three brushes 1620 are held by a brush holder 1610, and the brush holder 1610 has a housing 171.
It is fixed to the 0 plate portion 1710a. Wiring extends from each brush 1620 toward the inverter 200, and is configured to be electrically connected to the first rotor 1210 so that electric power from the inverter 200 can be transferred to and from the first rotor 1210.

Slip ring 1630 and bearing 15
A rotation sensor 1 composed of a resolver for detecting the rotation of the first rotor is provided on the outer peripheral surface of the input shaft 1213 between
911 is provided. The fixed side is the housing 1
It is fixed to a part of the plate portion 1710a protruding from 710. The signal from this rotation sensor 1911 is the second
Similar to the rotation sensor 1912 of the rotor 1310, its signal is output to the ECU 500 and used for rotation control of the first rotor.

Next, the first rotor 1210 and the second rotor 1
The cross-sectional structures of 310 and the stator 1410 will be described with reference to FIG. FIG. 2 shows a cross section of the magnetic circuit. Since the internal structure is axially symmetric, only the upper half will be described. The rotor core 1212 press-fitted into the input shaft 1213 has an outer diameter d1, a plurality of slots 1212a opening in the radial direction are formed on the outer periphery thereof, and a rotor winding 1211 is wound inside.
A total of 36 slots 1212a are formed for every 10 degree pitch, and the winding 1211 mounted therein has three phases of U-phase, V-phase, and W-phase single-phase, respectively. There is. A cylindrical rotor yoke 1311 is rotatably provided on the outer periphery of the rotor core 1212 via an air gap g1, and is composed of only a plurality of ferromagnetic bodies arranged on the inner peripheral surface side thereof at equal intervals in the circumferential direction. Field pole 131
1c is provided. Further, each field pole is formed with an opening 1311a directed in the axial direction so as to prevent leakage of magnetic flux from an adjacent field pole.

A frame 133 for supporting the rotor yoke 1311 on both sides is provided between each field pole.
1, 1332, bolt holes 13 into which bolts 1333 and 1334 for connecting the pressure plate 1335 are inserted
Twelve 11b are formed in every 30 degrees in the circumferential direction so as to penetrate the rotor yoke 1311 in the axial direction. A magnetic flux is formed between the field pole 1311c, the rotor core 1212, and the rotor winding 1211 to form one magnetic circuit, and the current flowing through the winding 1211 is appropriately controlled by the inverter 200, whereby the load output A rotation speed adjustment unit 1200 that adjusts the rotation speed is configured.

Further, on the outer peripheral surface side of the rotor yoke 1311, like the field pole 1311c, a field pole 1311 composed of only a plurality of ferromagnetic bodies arranged at equal intervals in the circumferential direction.
d is provided, and like the field pole 1311c, each field pole has an opening 1 for preventing leakage of magnetic flux with an adjacent field pole.
311a is formed. In the present embodiment, the field pole 1311c and the field pole 1311d are made of the same laminated electromagnetic steel sheet, and the opening 1311a and the bolt hole 1311b are formed by punching the electromagnetic steel sheet with a press machine or the like. Has been formed. The field pole 1311c and the field pole 1311d are arranged in the same phase in the radial direction, but since the field poles independently form the magnetic path with the first rotor 1210 and the stator 1410, the phases may be different. You may arrange it.
Further, the pitch angles may be different.

The outer diameter of the rotor yoke 1311 of the second rotor is d2, and the stator 1410 is provided on the outer peripheral portion of the second rotor via a predetermined air gap g2. A plurality of slots 1412 for winding the winding 1411 on the inner peripheral surface side of the stator core 1412 of the stator 1410.
a is a slot 1212a in which the rotor core 1212 is formed
36 pieces are formed every 10 degrees with the same pitch as
A magnetic flux is formed between the rotor and the magnetic field pole 1311d.
Forming a magnetic circuit of. The winding 1411 is the rotor core 1
Similar to the rotor winding 1211 of 212, each U phase of three phases, V
Each of the W-phase and the W-phase is mounted in order. And winding 14
It is possible to control the rotation of the second rotor by properly controlling the current flowing through the inverter 11 by the inverter 400 and adjust the torque toward the load output coupled to the second rotor. Adjustment unit 140
0.

Now, the principle of rotation of the rotating machine of the present invention will be described in more detail with reference to FIG. FIG. 3A shows a field pole 1311d.
This is the case where the center of the energizing current is on the center axis of, and the flow of the magnetic flux φ with respect to the current I of the stator winding 1411 is as shown in the figure, and the rotor 1310 is stable at the position shown in the figure. Further, the magnetic resistance is small and the inductance L is large at the current passing position (Lmax). FIG. 3B shows a case where the axis of the field poles is on the center of the energized current.
The flow of the magnetic flux φ with respect to the current I of 11 is as shown in the figure, and the rotor 1310 is stopped in an unstable state.

At this current passing position, the magnetic resistance is large and the inductance L is small (Lmin). Further, in this case, if the same φ as in FIG. 3A is to be produced, the magnetic resistance becomes large and the required AT (energy) becomes large. Figure 3 (c)
Shows the case where the middle of the central axis of the field pole 1311d and the axis between the field poles is the center of the energized current.

At this time, the flow of the magnetic flux φ with respect to the current I of the stator winding 1411 becomes as shown in the figure, and there is a portion p requiring a small amount of energy and a portion q requiring a large amount of energy. At this time, the rotor 1310 is required. A torque f (reluctance torque) that rotates in a direction in which energy becomes smaller is generated. With such a configuration, a so-called reluctance motor is configured between the stator 1410 and the field pole 1311d of the second rotor. Similarly, the field poles 1311c of the first rotor 1210 and the second rotor 1310 are also included.
The reluctance motor is configured with the same configuration between and.

FIG. 3 (d) is the reverse of FIG. 3 (c). Graphing the relationship between the above energized position and torque,
It looks like Figure 4. In this way, the torque f for rotating the rotor can be generated due to the magnetic resistance difference, that is, the inductance difference at the energized position. The larger the magnetic resistance difference, that is, the inductance difference, the larger the generated torque f. Become. Further, when the maximum value of the amount of change in the inductance at this time is Lmax and the minimum value is Lmin, the output formula of the reluctance torque generated can be expressed by the following formula 1.

[0036]

[Number 1] T = α · Pn (Lmax- Lmin) I 2 sin2θ where Pn is pole pairs, I is the winding current, theta is the relative angle of the current and the field (electrical angle). As you can see from the above formula,
The larger the difference between Lmax and Lmin, the larger the acting torque. It is about Lmax> 1.5Lmin that is sufficiently effective.

Next, a mechanism for assisting the motor output by directly transmitting the output of the engine 100 to the vehicle output side through electromagnetic force using the TS converter 1000 will be described. Now, when the output speed of the engine 100 is 2n [rpm] and the torque is t [Nm], this is output to the vehicle (rotation speed n [rpm], torque 2t [N]).
m]) will be described.

In this rotation speed adjusting unit 1200, the input (first
The torque has a relation of action and reaction between the rotor rotation energy) and the output (second rotor rotation energy), and when the torque is the same torque t [Nm], the rotation speed 2n [rpm] of the engine 100 is changed to the vehicle output rotation speed n [ rpm]. In order to obtain the output of the torque t [Nm] and the rotation speed n [rpm], the rotation direction and the acting torque direction are opposite to each other in the braking state, and the field magnet 1311c on the rotation speed adjusting unit side of the second rotor 1310. The position of the rotation sensor 1911, 191
By detecting the relative angle of 2 and appropriately calculating and controlling the current-carrying position of the rotor winding 1211 of the first rotor 1210, the braking state is controlled, and the power generation output is obtained from the first rotor, and the battery 600 can be obtained. Through the torque adjustment unit 140
Send to 0. Power is supplied to the windings of the first rotor 1210 from the inverter 200 through the brush holder 1610 and the brush 162.
0, the slip ring 1630, and the lead portion 1660, and the energization timing is calculated by the relative angles of the rotation sensors 1911 and 1912 of the first rotor and the second rotor. As a result, the torque t [Nm] and the rotation speed n [rp
m], and the energy nt is obtained as a power generation output. In this way, the TS converter is the engine 1
The output of 00 is transmitted to the drive wheels 700 on the load output side as it is, and the difference between the engine 100 side output speed and the output side rotation speed is used as a power generation output.

On the contrary, when the rotation speed on the engine 100 side is smaller than the output rotation speed, power is supplied from the battery 600 to perform a function as an electric motor. Next, the first rotor 1210
In order to set the vehicle output to 2 nt in the second rotor 1310 to which the output torque t [Nm] of the engine 100 is transmitted via the electromagnetic force, it is necessary to supplement the insufficient torque and the output nt required for it. There is.

In this case, the function of the torque adjusting section 1400 is similar to that of a normal motor, and the second torque is adjusted so that the desired torque and rotational speed can be obtained from the inverter 400 to the stator winding 1411.
Field 131 on the side of the torque adjustment unit 1400 of the rotor 1310
The position of 1d is detected by the rotation sensor 1912, and power is supplied while calculating the energization timing. Conversely, the engine 100
When the side torque becomes equal to or greater than the output side torque, the torque adjustment unit 1400 has a function of operating in the power generation mode and sending excess energy to the battery 600.

As described above, the input (torque t, rotational speed 2n) from the engine 100 is first input to the rotational speed adjusting unit 1200.
As a result, the torque t of the engine 100 is transmitted to the second rotor 1310 as it is, and the rotation speed 2n of the engine 100 is adjusted to a desired output rotation speed n. After the conversion, the torque adjustment unit 14
Send to 00.

On the torque adjusting unit 1400 side, the output of the rotation speed adjusting unit 1200 or the battery 600 is received, and the shortage or excess of the torque t with respect to the vehicle output torque is corrected here. At this time, if insufficient, 1400 functions as an electric motor, and if excessive, functions as a generator.
Further, the rotation speed adjusting unit 1200 also needs to function as an electric motor depending on the setting of the input of the engine 100.

On the contrary, when the system is used for braking the vehicle, the engine 100 can be used as the compressor (or the brake by the engine 100) as the rotation resistor of the first rotor of the rotation speed adjusting section 1200.
Of the braking energy of the vehicle, the rotation speed adjustment unit 1200.
Since a part of the braking energy is absorbed by, the braking energy that the torque adjusting unit 1400 bears is reduced, and the capacity required during braking can also be reduced.

With the above-described structure, the rotational energy of the engine 100 is directly transmitted to the traveling drive side through a part of the electromagnetic force, so that the capacity of the electric power system and the rotating machine can be reduced. Since the two rotating machines are combined and placed inside and outside, it is possible to make the size significantly smaller.
In addition, since the step of partially converting rotational energy into electric power and converting the electric power into rotational energy can be omitted, the efficiency can be expected to increase accordingly.

Generally, the rotating machine has multiple poles, which reduces the required magnetic path cross-sectional area. By making multiple poles, the thickness of the second rotor can be made extremely thin. Therefore, the two rotors (the rotation speed adjustment unit 1200 and the torque adjustment unit 1400) are arranged concentrically in the radial direction when integrated. It further reduces the maximization of, and further improves the miniaturization. Generally, the performance (w / kg) of a rotating machine is improved by reducing the air gap (g1, g2 in the present invention) on the magnetic circuit and increasing the effective magnetic flux amount.

Therefore, it is desirable to make the air gap as small as possible, but in reality, it is limited by the expansion of the outer diameter of the rotor due to the centrifugal force, the accuracy of the individual units such as the housing, and the accuracy of assembly. Among these, the assembly accuracy must be designed so that the accumulated tolerance of each component is eliminated as much as possible. As for the air gap g1, since an accurate positional relationship between the second rotor 1310 and the first rotor 1210 is required, in the present invention, the bearings 1512 and 1511 are provided between them and the mounting positions of these bearings are set to the gap configuration. Surface (first rotor 121
No. 0 rotor core 1212 outer surface and second rotor 1310
The inner peripheral surface of the rotor yoke 1311) is processed with high accuracy to enable highly accurate positioning.

Similarly, in the air gap g2, the bearings 1510, 1 are provided between the second rotor 1310 and the housings 1710, 1720 to which the stator 1410 is fixed.
By providing 513 and processing the mounting positions of these bearings with high accuracy with respect to the air gap g2 constituting surface (the outer peripheral surface of the rotor yoke 1311 of the second rotor 1310 and the inner peripheral surface of the stator core 1411), highly accurate positioning is possible. It has a different structure.

As a result, the air gaps g1 and g2 can be further reduced, the performance (w / kg) of the rotating machine can be improved, and the size reduction can be further improved. FIG. 5 shows a second embodiment. The field poles 1351b and 1352b of the second rotor 1350 in the second embodiment are composed of components 1351 and 1352 made of different ferromagnetic materials. Each of the component parts 1351 and 1352 has a recess formed at a predetermined interval on the surface facing the first rotor or the second rotor, which results in a predetermined gap g1 from the first rotor of the component part 1352. The convex portion opposed to the stator of the component 1351 via the predetermined gap g2 serves as the field pole 1351b.

A non-magnetic cylindrical member 1311e such as stainless steel is provided in the center of the field poles 1351b and 1352b between the components 1351 and 1352, and the R portion 135 is formed.
The inner space of the cylindrical member 1311e is used as a bolt hole 1311b into which the through bolt 1311 for fixing and holding the second rotor is inserted while performing relative positioning and fixing by press-fitting into the 1a and 1352a.

A space 1353 is further formed between the components 1351 and 1352, so that the field pole 135 is formed.
It prevents 1b and 1352b from affecting each other. Further, the field component parts 1351, 13 in this case
Reference numeral 52 is a ferromagnetic material having a magnetic permeability μ of 2000 or more, and is formed by laminating electromagnetic steel sheets, low carbon steel, pure iron, or the like.

FIG. 6 shows a third embodiment. Here, the field pole 1311d of the torque adjusting unit 1400 is composed of a ferromagnetic material and magnets 1420 arranged at equal intervals on the circumference. As described above, since the field can be formed only by making the field of the second rotor 1310 a ferromagnetic material having a high magnetic permeability μ, the thickness of the second rotor can be made as thin as possible, the size can be reduced, and the magnet is not used. Can be reduced.

If necessary, the magnet may be used only in the rotating machine requiring the magnet, so that the amount of the magnet used can be reduced as much as possible. In the above embodiment, both field poles of the second rotor are configured to generate reluctance torque. However, the invention is not limited to such a configuration, and one of them is a field pole that does not generate reluctance torque. It may be one.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a vehicle drive device according to the present invention.

FIG. 2 is a cross-sectional view of the main part of the vehicle drive device according to the first embodiment of the present invention.

3 (a), (b), (c), and (d) are operation diagrams for explaining the generation states of magnetic flux and rotational torque of the rotating electric machine according to the present invention.

FIG. 4 is a diagram showing a relationship between an energized position and a torque generated in a second rotor.

FIG. 5 is a cross-sectional view of a vehicle drive device according to a second embodiment.

FIG. 6 is a cross-sectional view of a main part of a vehicle drive device according to a third embodiment.

[Explanation of symbols]

 100 Engine 200, 400 Inverter 500 ECU 600 Battery 700 Drive Wheel 1000 T-S Converter 1210 First Rotor 1211 Rotor Winding 1310 Second Rotor 1311a Opening 1311c, 1311d Field Pole 1410 Stator 1411 Stator Winding

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H02K 7/18 H02P 5/00 501 H02P 5/05

Claims (6)

[Claims] 1. A drive device, which receives an output of an internal combustion engine as an input and controls output of a predetermined drive torque and a rotational speed with respect to a connected load output, wherein the drive device is housed in the housing, The first and second rotors capable of rotating relative to each other to transmit the rotational force from the internal combustion engine to the load output, and the stator fixed to the housing, and the second rotor is provided inside the stator. The first rotor is concentrically arranged inside the second rotor, the first rotor has a first coil, and the stator has a second coil. The second rotor has a first facing surface that faces the first rotor via a first air gap, and a first field that performs mutual electromagnetic action with the first coil. Then, together with the first air gap, A second electrical machine that constitutes a rotary electric machine and also has a second facing surface that faces the stator via the second air gap and a second electromagnetic field that interacts with the second coil. A second rotating electric machine having a field and the second air gap,
The inductance of the first or second coil is periodically changed by relative rotation between the first and second rotors or relative rotation between the stator and the second rotor. A drive device for a vehicle, characterized in that the rotor is configured. 2. The vehicle drive device according to claim 1, wherein the periodic change in the inductance of the first or second coil exists once per magnetic pole pitch. 3. The amount of change in the inductance is the MA
MIN value (Lmin) for X value (Lmax)
Is Lmax> 1.5Lmin, The vehicle drive device according to claim 1 or 2, wherein. 4. The method according to claim 1, wherein at least one of the first field and the second field of the second rotor is composed only of a ferromagnetic material having a magnetic permeability μ of 2000 or more. 3. The vehicle drive device according to item 3. 5. The at least one of the first field and the second field of the second rotor is integrally formed by punching and laminating electromagnetic steel sheets. The vehicle drive device according to item 2, 3, or 4. 6. The method according to claim 1, wherein at least one of the first field and the second field of the second rotor comprises a magnet. Vehicle drive unit.