JP2018154151A - Vehicle drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle drive device in which a dynamoelectric machine and a resolver can be made common allowing a connecting member for connecting a dynamoelectric machine rotor and resolver rotor to also be made common for a pair of drive units which respectively drive a pair of coaxially arranged wheels.SOLUTION: A vehicle drive device comprises a first drive unit 1L and second drive unit 1R. A first stator 10L and a second stator 10R have the same spacing in a circumferential direction C for a plurality of reference positions M01 to M08. Any of the plurality of reference positions M01 to M08 of the first stator 10L has the same circumferential direction C position as any of the plurality of reference positions M01 to M08 of the second stator 10R in the respective intermediate viewpoints of the first drive unit 1L and the second drive unit 1R. The circumferential direction C position for a first sensor stator detection reference position S0 and that for a second sensor stator detection reference position S0 are the same.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vehicle drive device including a pair of first drive units and second drive units for driving each of a pair of coaxially arranged wheels.

  The drive device as described above is disclosed in, for example, Patent Document 1 below. The drive device (1) disclosed in Patent Document 1 is an in-wheel type drive device called a so-called in-wheel motor, and is attached to each of a pair of left and right wheels (W) to drive a corresponding wheel (W). To do. The drive device (1) of Patent Document 1 is provided with a resolver (71) capable of detecting the position in the rotational direction of the rotor (RO) of the rotating electrical machine (MG), and is based on the detection value by the resolver (71). Thus, control of the rotating electrical machine (MG) is performed.

  Vehicle-side devices such as an inverter that supplies electric power to a rotating electrical machine and a control device that receives a signal from a resolver and controls the rotating electrical machine are often arranged at a common location for each of a pair of driving devices. Therefore, for example, when the inverter is disposed on the vehicle rear side of the pair of drive devices, it is preferable that the wiring connection portion of the rotating electrical machine in each drive device is also disposed on the vehicle rear side. In order to arrange the wiring connection portions of the respective drive devices in this way, when the left and right drive devices are viewed from the center side of the vehicle in the left-right direction (hereinafter referred to as intermediate vision), both are considered to be mirror images. It is necessary to configure so that In this case, a member having a shape that basically has a mirror image relationship is used between the drive device for the left wheel and the drive device for the right wheel. However, the use of a common member on both the left and right leads to a reduction in manufacturing costs and the number of parts. For example, it is conceivable that the rotating electric machine and the resolver are common parts on the left and right. However, when the rotating electric machine and the resolver are common parts on the left and right, the following problems may occur.

  FIG. 7 is a diagram schematically illustrating a left driving device and a right driving device in intermediate vision. For example, as shown in FIG. 7, when the wiring connection part 140 of the rotating electrical machine and the wiring connection part 540 of the resolver are arranged in a mirror image relationship on the left and right, the rotation of the resolver relative to the detection reference position S0 is performed. One of the stator reference positions M01 to M08 (M03 or M05 in the example of FIG. 7), which corresponds to the origin of control of the electric machine, is set to the position of α ° in the left-wheel drive device with the clockwise direction being positive. There is an example in which the right wheel drive device is at a position of -α °. In this case, from the control device of the rotating electrical machine, the detection reference position S0 of the left and right resolvers is relatively shifted by 2α °.

  Further, when the rotor of the rotating electrical machine and the rotor of the resolver are connected by a connecting member, when a positioning mechanism such as a key groove is provided in the connecting member, The position of the positioning mechanism needs to be different between the left and right connecting members, and the number of types of parts is increased accordingly.

JP 2016-120869 A

  Therefore, in the pair of drive units for driving each of the pair of coaxially arranged wheels, the rotating electric machine and the resolver are made common and the connecting member for connecting the rotor of the rotating electric machine and the rotor of the resolver is made common. Therefore, it is desired to realize a vehicle drive device that can perform the above.

A vehicle drive device according to the present disclosure includes:
A vehicle drive device comprising a pair of first drive unit and second drive unit for driving each of a pair of coaxially arranged wheels,
The first drive unit includes a first rotating electric machine having a first rotor and a first stator, a first rotation sensor having a first sensor rotor and a first sensor stator, the first rotor, and the first sensor rotor. A first connecting member for connecting the first sensor stator to the first stator in a fixed position;
The second drive unit includes a second rotating electric machine having a second rotor and a second stator, a second rotation sensor having a second sensor rotor and a second sensor stator, the second rotor, and the second sensor rotor. A second connecting member for connecting the second sensor stator to the second stator in a fixed position;
The first stator and the second stator have the same circumferential interval at a plurality of reference positions, and the arrangement of power supply connection portions that connect the stator coil and the power supply to the plurality of reference positions is the same. ,
The first power supply connection portion that is the power supply connection portion of the first stator and the power supply connection portion of the second stator in a vehicle-mounted state in which the first drive unit and the second drive unit are attached to a vehicle body. The second power connection is on the same side of the vehicle longitudinal direction,
In the in-vehicle state, each of the first drive unit and the second drive unit is viewed from an intermediate position side in the axial direction connecting them, and any one of the plurality of reference positions of the first stator, The circumferential position of the second stator is the same as any one of the plurality of reference positions, and the circumferential position of the detection reference position of the first sensor stator and the detection reference position of the second sensor stator is the same. It is.

  According to this configuration, since the first connection portion and the second connection portion are on the same side in the vehicle front-rear direction, the first connection portion and the second connection portion are arranged at different circumferential positions in the intermediate view. However, the circumferential positional relationship between any of the plurality of reference positions of the first stator and the detection reference position of the first sensor stator, and any of the plurality of reference positions of the second stator and detection of the second sensor stator. The positional relationship in the circumferential direction with the reference position can be made the same in intermediate vision. Thus, for example, a first connection member that connects the first rotor and the first sensor rotor in the first drive unit, a second connection member that connects the second rotor and the second sensor rotor in the second drive unit, and Even in the case where a circumferential positioning mechanism such as a keyway is provided in each of these, the circumferential positional relationship between the positioning reference position of the first rotor and the positioning reference position of the first sensor rotor, and the second The positional relationship in the circumferential direction between the positioning reference position of the rotor and the positioning reference position of the second sensor rotor can be made the same. Therefore, when the first drive unit and the second drive unit share the rotating electric machine and the resolver, the first connection member and the second connection member can have a common configuration. Therefore, according to this configuration, the rotating electrical machine, the resolver, and the connecting member can be shared by the first drive unit and the second drive unit.

  Further features and advantages of the technology according to the present disclosure will become more apparent from the following description of exemplary and non-limiting embodiments described with reference to the drawings.

The plane schematic diagram of the vehicle using the vehicle drive device. II-II sectional drawing in FIG. The principal part expanded development view of a stator. The simplified view of the 1st drive unit in intermediate vision. The schematic diagram in the intermediate view of the drive device for vehicles. The schematic diagram in the intermediate view of the drive device for vehicles which concerns on other embodiment. The schematic diagram in the intermediate view which concerns on the conventional vehicle drive device.

1. 1st embodiment 1st embodiment of the drive device for vehicles is described with reference to drawings. In the present specification, an in-wheel type vehicle drive device (drive unit) for a vehicle such as an electric vehicle or a hybrid vehicle will be described as an example. As shown in FIG. 1, the vehicle drive device D includes a pair of first drive unit 1 </ b> L and second drive unit 1 </ b> R for driving each of a pair of wheels W arranged coaxially. In the present specification, the description will be made assuming that the first drive unit 1L drives the left wheel WL and the second drive unit 1R drives the right wheel WR.

  In the following description, unless otherwise specified, the “axial direction X”, “radial direction Y”, and “circumferential direction C” are defined based on the rotational axis XC (see FIG. 2) of the wheel W. The “vehicle longitudinal direction Z” is defined based on the longitudinal direction of the vehicle 99 (see FIG. 1). Further, as shown in FIG. 1, a surface virtually provided along the vehicle longitudinal direction Z and the vertical direction at the center of the vehicle 99 between the left wheel WL and the right wheel WR is defined as an “intermediate surface MF”. . The side (vehicle center side) toward the intermediate surface MF in the axial direction X is referred to as “axially inner side X1”, and the opposite side is referred to as “axially outer side X2”. Further, in this specification, “intermediate vision MV” refers to viewing from the intermediate surface MF toward the axially outer side X2.

  As shown in FIG. 2, the first drive unit 1L includes a first rotary electric machine ML having a first rotor 20L and a first stator 10L, and a first rotation sensor SL having a first sensor rotor 51L and a first sensor stator 52L. And a first connecting member 24L that connects the first rotor 20L and the first sensor rotor 51L. The second drive unit 1R includes a second rotating electrical machine MR having a second rotor 20R and a second stator 10R, a second rotation sensor SR having a second sensor rotor 51R and a second sensor stator 52R, and a second rotor. 20R and the 2nd connecting member 24R which connects the 2nd sensor rotor 51R.

  In FIG. 2, the first drive unit 1L that drives the left wheel WL is illustrated, but the configuration between the members in the first drive unit 1L and the configuration between the members in the second drive unit 1R are: Basically the same. Therefore, hereinafter, the configuration of the drive unit 1 (1L, 1R) may be described without particularly distinguishing the first drive unit 1L and the second drive unit 1R.

  The rotating electrical machine M includes a stator 10 as a stator and a rotor 20 as a rotor. In the example illustrated in FIG. 2, the rotating electrical machine M is an inner rotor type rotating electrical machine including a stator 10 fixed to the case 3 and a rotor 20 disposed on the radially inner side Y <b> 1 of the stator 10. .

  The rotating electrical machine M is configured to be able to fulfill a function as a motor (electric motor) that receives power supplied from a battery and generates power. At this time, the power generated by the rotating electrical machine M is transmitted to the wheel rim 4 via the differential gear device 62 (details will be described later), the output member 60 and the hub 70. The rotating electrical machine M also functions as a generator (generator) that generates electric power using the power transmitted to the rotating electrical machine M via the hub 70, the output member 60, and the differential gear device 62. At this time, the rotating electrical machine M transmits torque in the direction opposite to the rotation direction to the output member 60 side to perform regenerative braking. The electric power generated by the rotating electrical machine M is supplied to the battery. As the rotating electrical machine M, for example, a brushless DC motor, another synchronous or induction AC motor, and a DC motor can be used. Further, in the present application, the “rotary electric machine” is used as a concept including a motor (electric motor), a generator (generator), and a motor / generator functioning as both a motor and a generator as necessary.

  In the example shown in FIG. 2, the drive unit 1 is a drive unit arranged on the radially inner side Y <b> 1 of the wheel rim 4 of the drive wheel of the vehicle 99 so as to overlap the wheel rim 4 in the axial direction X. In the present specification, regarding the arrangement of two members, “overlap” in a certain direction means that each of the two members has at least a portion at the same position with respect to the arrangement in the direction.

  The drive unit 1 includes a case 3 for housing the rotating electrical machine M therein. The case 3 is suspended from a vehicle body (not shown) of the vehicle 99 via a suspension device (not shown). In the present embodiment, the case 3 includes an outer case member 3A disposed on the axially outer side X2, and an inner case member 3B disposed on the axially inner side X1 with respect to the outer case member 3A. In the example shown in FIG. 2, the inner case member 3B is connected to the outer case member 3A by a bolt 92 in a state in which the opening 3AO formed in the end region of the axially inner side X1 in the outer case member 3A is closed. ing.

  In the example shown in FIG. 2, the stator 10 includes a stator core 11 and a coil end portion 13. The stator core 11 is fixed to the outer case member 3 </ b> A by bolts 91. Thereby, the stator 10 is fixed to the case 3. For example, the stator core 11 is a laminated structure in which a plurality of annular plate-shaped electromagnetic steel plates are laminated. The stator core 11 is provided with a plurality of slots 19 extending in the axial direction X and the radial direction Y at predetermined intervals along the circumferential direction C (see FIG. 3). In FIG. 3, the circumferential direction C is developed in a straight line for easy understanding. The stator coil 12 wound around each of the slots 19 (see FIG. 3) forms a coil end portion 13 that protrudes in the axial direction X from the stator core 11 on both the axially outer side X2 and the axially inner side X1 of the stator core 11. Has been.

  In the example shown in FIG. 2, the rotor 20 is rotatably supported by the inner case member 3B via the rotating shaft 61 and the inner bearing B2. The rotor 20 includes a rotor core 21, a retainer 23, and a rotor hub 24. For example, the rotor core 21 is a laminated structure in which a plurality of annular plate-shaped electromagnetic steel plates are laminated, and permanent magnets such as rare earth magnets are embedded therein.

  In the example shown in FIG. 2, the retainer 23 is attached to both the end surface of the rotor core 21 on the axially outer side X2 and the end surface of the axially inner side X1. The pair of retainers 23 sandwich the electromagnetic steel plates constituting the rotor core 21 from both sides in the axial direction X. The rotor core 21 sandwiched in the axial direction X by the retainer 23 is fixedly supported on the outer peripheral surface of the rotor hub 24 facing the radially outer side Y2.

  In the present embodiment, the rotor hub 24 includes a flange portion 24A having an end portion on the radially inner side Y1 coupled to the rotary shaft 61 and extending along the radially outer side Y2, a rotor mounting portion 24B to which the rotor core 21 is attached, and a circumferential direction. A rotor positioning portion 24C that functions as a positioning mechanism for the rotor core 21 in C, a sensor rotor mounting portion 24D to which the sensor rotor 51 is mounted, and a sensor rotor positioning portion 24E that functions as a positioning mechanism for the sensor rotor 51 in the circumferential direction C. Have.

  In the present embodiment, the rotor mounting portion 24B is formed so as to protrude from the flange portion 24A to the axially outer side X2. The rotor mounting portion 24B has a cylindrical surface that faces the radially outer side Y2. And the rotor positioning part 24C is formed in the specific location in the circumferential direction C among the cylindrical surfaces of the rotor mounting part 24B. In the example shown in FIG. 2, the rotor positioning portion 24 </ b> C is formed in a groove shape along the axial direction X while being recessed in the radially inner side Y <b> 1 at one location in the circumferential direction C of the cylindrical surface of the rotor mounting portion 24 </ b> B. . The rotor core 21 has a rotor protrusion 21A that protrudes radially inward Y1 on the inner peripheral surface and is formed along the axial direction X. The rotor ridge portion 21A engages with the rotor positioning portion 24C, whereby the rotor 20 is positioned in the circumferential direction C.

  In the present embodiment, the sensor rotor mounting portion 24D is formed so as to protrude from the flange portion 24A to the inner side X1 in the axial direction. The sensor rotor mounting portion 24D has a cylindrical surface facing the radially outer side Y2. And the sensor rotor positioning part 24E is formed in the specific location in the circumferential direction C among the cylindrical surfaces of the sensor rotor attachment part 24D. In the example shown in FIG. 2, the sensor rotor positioning portion 24E is formed in a groove shape along the axial direction X while being recessed in the radially inner side Y1 at one place in the circumferential direction C of the cylindrical surface of the sensor rotor mounting portion 24D. ing. Further, the sensor rotor 51 has a sensor rotor protrusion 51 </ b> A that protrudes radially inward Y <b> 1 on the inner peripheral surface and is formed along the axial direction X. The sensor rotor 51 is positioned in the circumferential direction C by engaging the sensor rotor protrusion 51A with the sensor rotor positioning portion 24E.

  In the example illustrated in FIG. 2, the rotor positioning unit 24C and the sensor rotor positioning unit 24E are disposed at the same position in the circumferential direction C. Thereby, the positional relationship in the circumferential direction C between the positioning reference position of the rotor 20 and the positioning reference position of the sensor rotor 51 is always constant.

  In the example shown in FIG. 2, the rotary shaft 61 has an end on the axially inner side X1 rotatably supported by the inner case member 3B via the inner bearing B2, and an end on the axially outer side X2 is an outer bearing. The output member 60 is rotatably supported via B1. The inner bearing B2 is disposed on the radially inner side Y1 of the cylindrical boss portion 67 protruding from the inner case member 3B to the axially outer side X2. The outer bearing B <b> 1 is disposed on the radially inner side Y <b> 1 of the output member 60.

  The rotation sensor S detects the rotational position of the rotor 20. In the example shown in FIG. 2, the rotation sensor S is provided between the flange portion 24 </ b> A of the rotor hub 24 and the inner case member 3 </ b> B in the axial direction X. In the present embodiment, the rotation sensor S includes a sensor rotor 51 provided on the rotor hub 24, and a sensor stator 52 provided with a coil while being fixed to the inner case member 3B. Specifically, the rotation sensor S is configured by, for example, a resolver.

  In the example shown in FIG. 2, the power transmission mechanism T includes a rotating shaft 61 that is rotationally driven by the rotating electrical machine M, a differential gear device 62 that performs a speed change of the rotating shaft 61 and a torque conversion, and a hub 70. And an output member 60 for transmitting rotation and torque to the wheel rim 4 (wheel W).

  In the present embodiment, the differential gear device 62 is a stepped pinion type planetary gear mechanism. In the example shown in FIG. 2, the differential gear device 62 is disposed on the outer side X <b> 2 in the axial direction than the flange portion 24 </ b> A of the rotor hub 24. Further, the differential gear device 62 is disposed on the radially outer side Y <b> 2 of the rotating shaft 61 and on the radially inner side Y <b> 1 of the rotor core 21. In the present embodiment, the differential gear device 62 is a reduction mechanism that reduces the rotation speed of the rotary shaft 61 and amplifies the torque and transmits it to the output member 60. The sun gear 63 of the planetary gear mechanism constituting the differential gear device 62 is an input element, the carrier 64 is an output element, and the ring gear 65 is a fixed element.

  As shown in FIG. 2, the output member 60 is connected to the hub 70 disposed on the radially outer side Y2 from the output member 60 via a spline fitting portion, and the output member 60 and the hub 70 are It is comprised so that it may rotate integrally. The hub 70 is fixed to the wheel rim 4 by bolts 93, and the hub 70 and the wheel rim 4 are configured to rotate integrally with each other. The hub 70 is rotatably supported by the outer case member 3A via the main bearing B. A nut 90 is attached to the end of the output member 60 on the axially outer side X2. The nut 90 fastens and fixes the output member 60 and the hub 70.

  As shown in FIG. 3, the stator 10 has a stator coil 12 around which coils of a plurality of phases (three phases in this example) are wound. In the present embodiment, distributed winding is used in which two slots each having in-phase coils are arranged. That is, in-phase coils are arranged in two slots adjacent to each other in the circumferential direction C to form a coil set, and the plurality of coil sets are arranged in order along the circumferential direction C. Specifically, when the U-phase, V-phase, and W-phase coil groups arranged in two adjacent slots are respectively a U-phase coil group, a V-phase coil group, and a W-phase coil group, the U-phase coil group, A pattern in which a plurality of coil groups are arranged in order along the circumferential direction C, such as a V-phase coil group, a W-phase coil group, a U-phase coil group,.

  And the one coil part 15 is formed of a pair of coil set of the same phase arrange | positioned on both sides of the circumferential direction C on both sides of the coil set of a different phase. For example, in the U-phase coil section, currents in different directions flow through one and the other of a pair of U-phase coil sets arranged on both sides of the V-phase coil set and the W-phase coil set. A magnetic flux along the radial direction Y is formed between the U-phase coil sets. The coil portion 15 is formed by such a pair of in-phase coils. Therefore, the plurality of coil portions 15 having the same phase are arranged in a state of being arranged in the circumferential direction C while sharing the coil sets at both ends. Moreover, in the coil parts 15 of different phases, a plurality of arrangement regions in the circumferential direction C are arranged side by side in the circumferential direction C while overlapping with each other. In any case, a plurality of coil portions 15 are arranged in a state of being arranged in the circumferential direction C. In this example, the number of poles which is the number of N poles and S poles of the permanent magnet of the rotor 20 is “8”, and correspondingly, the coil portion 15 of the stator coil 12 has eight coil portions 15 for each phase. In three phases, 24 pieces are arranged side by side in the circumferential direction C so as to overlap each other.

  As described above, the stator coil 12 forms a plurality of coil portions 15 arranged in the circumferential direction around the axis of the rotor 20. That is, the stator coil 12 of the first stator 10L forms a plurality of coil portions 15 arranged in the circumferential direction around the axis of the first rotor 20L. Further, the stator coil 12 of the second stator 10R forms a plurality of coil portions 15 arranged in the circumferential direction around the axis of the second rotor 20R. In the present embodiment, the circumferential direction centering on the axis of the first rotor 20L and the second rotor 20R is equal to the circumferential direction C with the rotation axis XC of the wheel W as a reference.

  The stator 10 is electrically connected to an inverter 98 (see FIG. 1), and a three-phase AC voltage is applied from the inverter 98. The inverter 98 is disposed on either side of the vehicle longitudinal direction Z with respect to the pair of first drive unit 1L and second drive unit 1R disposed side by side in the axial direction X. In the example shown in FIG. 1, the inverter 98 is disposed on the center side of the vehicle 99 in the vehicle longitudinal direction Z, that is, on the vehicle rear side Z2 with respect to the pair of first drive unit 1L and second drive unit 1R. In the present embodiment, as shown in FIG. 4, the first power supply connection portion 14 </ b> L that is the power supply connection portion 14 of the first stator 10 </ b> L in a vehicle-mounted state in which the first drive unit 1 </ b> L and the second drive unit 1 </ b> R are attached to the vehicle body. And the 2nd power supply connection part 14R which is the power supply connection part 14 of 2nd stator 10R is on the same side of the vehicle front-back direction Z. Thereby, when various members such as a mount are arranged in the vertical direction of the drive unit 1, the power connection portion 14 can be arranged avoiding the member, and as a result, the space efficiency inside the vehicle body is improved. be able to. In the example illustrated in FIG. 4, the first power supply connection portion 14 </ b> L and the second power supply connection portion 14 </ b> R are disposed on the vehicle rear side Z <b> 2 in the drive unit 1. However, when the drive unit 1 is used for the rear wheel, the first power supply connection portion 14L and the second power supply connection portion 14R may be disposed on the vehicle front side Z1 in the drive unit 1.

  The sensor stator 52 outputs a signal corresponding to the rotational position of the rotor 20. This output value is transmitted to the control device (not shown) through the detection signal line 53. The control device detects the rotational position of the rotor 20 based on the output value received from the sensor stator 52 and controls the inverter 98 according to the rotational position of the rotor 20. Thereby, the rotating electrical machine M is controlled.

  In the example shown in FIG. 4, each of the first sensor stator 52L and the second sensor stator 52R includes a signal line connection portion 54 to which a detection signal line 53 is connected. As described above, the detection signal line 53 is also connected to a control device (not shown). In the present embodiment, the signal line connection portion 54 is disposed on the lower side in the vertical direction of the drive unit 1.

  Here, in general, in the vehicle drive device D including the pair of left and right drive units 1 for driving each of the pair of coaxially arranged wheels W, the left and right sides of the vehicle 99 from the center side of the vehicle 99 in the left and right direction. When each of the drive units 1 is viewed, it is necessary to configure both so as to have a mirror image relationship. This is because, as described above, the connection with the inverter 98 disposed on either side of the vehicle longitudinal direction Z with respect to the pair of first drive unit 1L and second drive unit 1R disposed side by side in the axial direction X. This is because it is desirable to arrange both the pair of power supply connection portions 14 in each drive unit 1 on the same side in the vehicle longitudinal direction Z.

  In the present embodiment, the case 3 of each of the first drive unit 1L and the second drive unit 1R is configured in a mirror image shape. On the other hand, at least the rotating electrical machine M, the rotation sensor S, and the rotor hub 24 that supports the rotor 20 and the sensor rotor 51 are shared by the first drive unit 1L and the second drive unit 1R. As a result, reductions in manufacturing costs, the number of types of parts, and the like are realized.

  However, when the rotating electrical machine M and the rotation sensor S are shared by the first drive unit 1L and the second drive unit 1R (in this example, the left and right are shared), the following problems may occur.

  That is, when the rotating electrical machine M and the rotation sensor S are shared on the left and right sides, the left and right driving are performed in the configuration in which the power supply connecting portion 14 is disposed on the vehicle rear side Z2 in the driving unit 1 and along the horizontal direction. The respective stators 10 of the unit 1 are installed in a posture reversed by 180 °.

  In the comparative example of FIG. 7, in the intermediate view, the positions of the plurality of reference positions M01 to M08 of the stator are in a positional relationship inverted by 180 ° between the left drive unit and the right drive unit. On the other hand, the detection reference position S0 of the rotation sensor in the left drive unit is set to the circumferential first side C1 with respect to any one of the plurality of reference positions M01 to M08 (M03 in the example shown in FIG. 7). When the angle is positive as α °, the rotation sensor detection reference position S0 in the right drive unit is one of a plurality of reference positions M01 to M08 (see FIG. 7). In the example shown in FIG. 4, the film is disposed at an angle of −α ° with respect to M05). In order to control the rotating electrical machine, when there is a shift in these positions, so-called zero point correction is performed to correct this shift. However, in the case of the comparative example of FIG. 7, the left drive unit is corrected by offsetting the detection reference position S0 by α °, and the right drive unit is corrected by offsetting the detection reference position S0 by −α °. There is a need to do. Then, in each of the left and right drive units, it is necessary to perform the zero point correction separately, which may cause a problem that the control becomes complicated.

  Here, the “reference position” of the stator 10 refers to a specific position in the circumferential direction C that is the origin of control. The reference position can be set with reference to any one of the coils of the plurality of phases. In the example shown in FIG. 3, a U-phase coil is set as a reference. As shown in FIG. 3, the reference positions M01, M02... Are set at positions corresponding to the center positions in the circumferential direction C of the plurality of coil portions 15. In this embodiment, as shown in FIG. 5, since the stator coil 12 corresponding to the 8-pole rotor 20 is used, eight reference positions are set as indicated by M01 to M08 in the drawing. The zero point correction described above is performed in order to make any of the eight reference positions M01 to M08 coincide with the detection reference position S0 of the sensor stator 52 in terms of control. Here, the “detection reference position” of the sensor stator 52 refers to the position in the circumferential direction C of the sensor stator 52 corresponding to the origin position of the rotation sensor S. In this example, one detection reference position in the circumferential direction C. S0 is set (see FIG. 5).

  FIG. 5 is a schematic diagram showing each of the first drive unit 1L and the second drive unit 1R in the intermediate view MV (see FIG. 1). In the present embodiment, the first sensor stator 52L is attached at a fixed position with respect to the first stator 10L. The second sensor stator 52R is attached at a fixed position with respect to the second stator 10R. In the example shown in FIG. 5, the sensor stator 52 is positioned relative to the stator 10 such that the detection reference position S0 of the sensor stator 52 and any of the plurality of reference positions M01 to M08 of the stator 10 coincide with each other in the circumferential direction C. It is attached at a fixed position. Thereby, the origin of control for applying the AC voltage to the stator coil 12 can be made common to the first rotating electrical machine ML and the second rotating electrical machine MR without performing zero point correction.

  Further, as shown in FIG. 5, the first stator 10L and the second stator 10R have a plurality of reference positions M01 to M08 corresponding to the center positions in the circumferential direction C of the plurality of coil portions 15 (see FIG. 3). The intervals in the circumferential direction C are the same, and the arrangement of the power supply connection portion 14 for connecting the stator coil 12 and the power supply (inverter 98) to the plurality of reference positions M01 to M08 is also the same. As described above, in this embodiment, the stator coil 12 corresponding to the 8-pole rotor 20 is used, and the intervals in the circumferential direction C of the plurality of reference positions M01 to M08 are set to 45 °. Moreover, the power supply connection part 14 is arrange | positioned at the vehicle rear side Z2 along the horizontal direction in the drive unit 1. FIG.

  Then, as shown in FIG. 5, in the vehicle-mounted state in which the first drive unit 1L and the second drive unit 1R are attached to the vehicle body, the first drive unit 1L and the second drive unit 1R are respectively connected in the axial direction. In the intermediate view MV viewed from the intermediate position side of X, the position in the circumferential direction C between any of the plurality of reference positions M01 to M08 of the first stator 10L and any of the plurality of reference positions M01 to M08 of the second stator 10R is They are arranged to be the same. In addition, the detection reference position S0 of the first sensor stator 52L and the detection reference position S0 of the second sensor stator 52R are arranged to be the same in the circumferential direction C. In the present embodiment, in the in-vehicle state, one of the plurality of reference positions M01 to M08 (M02 and M06 in the example shown in FIG. 5) of the first stator 10L is the rotation axis (rotation axis XC) of the first stator 10L. It is arrange | positioned on the vertical plane VF which passes through. Any one of the plurality of reference positions M01 to M08 (M06 and M02 in the example shown in FIG. 5) of the second stator 10R is disposed on the vertical plane VF passing through the rotation axis (rotation axis XC) of the second stator 10R. Has been. Thereby, in the present configuration in which the plurality of reference positions M01 to M08 are set at 45 ° intervals, all of the plurality of reference positions M01 to M08 of the first stator 10L and the second stator 10R are in the intermediate view MV. The positions in the circumferential direction C are the same as all of the plurality of reference positions M01 to M08.

  In the present embodiment, in the intermediate view MV, the first sensor stator 52L and the second sensor stator 52R have the same arrangement of the signal line connection portion 54 with respect to the detection reference position S0. Accordingly, the position in the circumferential direction C of the signal line connecting portion 54 of the first sensor stator 52L and the position in the circumferential direction C of the signal line connecting portion 54 of the second sensor stator 52R are made the same in the intermediate view MV. Can do. In the present embodiment, as shown in FIG. 5, the position of the detection reference position S0 and the position of the signal line connection portion 54 are the same position in the circumferential direction C in the intermediate vision MV.

  In the example shown in FIG. 5, the detection reference position S0 of the first sensor stator 52L is arranged on a vertical plane VF passing through the rotation axis (rotation axis XC) of the first sensor stator 52L. The detection reference position S0 of the second sensor stator 52R is disposed on a vertical plane VF that passes through the rotation axis (rotation axis XC) of the second sensor stator 52R. As a result, the rotary electric machine M and the rotation sensor S of the first drive unit 1L and the rotary electric machine M and the rotation sensor S of the second drive unit 1R are rotated 180 ° in the circumferential direction C in the intermediate vision MV. In this case, the power supply connection portion 14 of these drive units 1, any one of the plurality of reference positions M01 to M08, and the detection reference position S0 may be arranged in a mirror-symmetrical relationship with respect to the vertical plane VF. it can. Therefore, even when the rotating electric machine M and the rotation sensor S are shared by the first drive unit 1L and the second drive unit 1R, when the drive unit 1 is mounted on the vehicle 99, the vehicle such as each drive unit 1 and the inverter 98 is used. It is possible to easily connect to a device on the 99 side.

  According to the first embodiment described above, in the intermediate view MV, one of the plurality of reference positions M01 to M08 of the stator 10 and the detection reference position S0 of the sensor stator 52 coincide with each other in the circumferential direction C. Therefore, there is no need to perform zero point correction. In addition, since any one of the plurality of reference positions M01 to M08 and the detection reference position S0 coincide with each other in the circumferential direction C, the relative positional relationship is the same even when the positional relationship is rotated by 180 °. It is. Therefore, it is possible to suppress the overall control of the vehicle drive device D including the first drive unit 1L and the second drive unit 1R from becoming complicated.

  Each of the first connecting member 24L (rotor hub 24) and the second connecting member 24R (rotor hub 24) is provided with a rotor positioning portion 24C and a sensor rotor positioning portion 24E. These positioning portions define the positional relationship in the circumferential direction C between the positioning reference position of the first rotor 20L and the positioning reference position of the first sensor rotor 51L, or the positioning reference position of the second rotor 20R and the second sensor. It defines the positional relationship in the circumferential direction C with the positioning reference position of the rotor 51R. As described above, by setting the relationship between any one of the plurality of reference positions M01 to M08 of the stator 10 and the detection reference position S0 of the sensor stator 52, the positional relationship between the rotor 20 and the sensor rotor 51 is also The first drive unit 1L and the second drive unit 1R have a positional relationship of being rotated 180 ° in the circumferential direction C. Since the rotor 20 and the sensor rotor 51 rotate, the positional relationship in the circumferential direction C between the positioning reference position of the first rotor 20L and the positioning reference position of the first sensor rotor 51L, and the positioning reference position of the second rotor 20R The positional relationship in the circumferential direction C with the positioning reference position of the second sensor rotor 51R is the same. Therefore, when the first drive unit 1L and the second drive unit 1R share the rotating electrical machine M and the rotation sensor S, the first connection member 24L (rotor hub 24) and the second connection member 24R (rotor hub 24) Thus, the positions of the rotor positioning portion 24C and the sensor rotor positioning portion 24E can be made common. Therefore, the first connecting member 24L (rotor hub 24) and the second connecting member 24R (rotor hub 24) can have a common configuration.

2. Second Embodiment Hereinafter, a second embodiment of the vehicle drive device will be described with reference to the drawings. In addition, since it is the same as that of 1st embodiment about the point which is not demonstrated especially below, description is abbreviate | omitted.

  In the first embodiment, in each of the first stator 10L and the second stator 10R, one of the plurality of reference positions M01 to M08 (M02 and M06 in the example shown in FIG. 5) is arranged on the vertical plane VF. . In other words, the reference position M04 and the reference position M08 are arranged on the horizontal plane. However, in the second embodiment, in each of the first stator 10L and the second stator 10R, any one of the plurality of reference positions M01 to M08 (M08 in the example shown in FIG. 6) is γ ° (for example, 20 °) from the horizontal plane. It is arranged at an inclined position.

  In the example shown in FIG. 6, the first power supply connecting portion 14L of the first stator 10L and the second of the second stator 10R are mounted in a vehicle-mounted state in which the first drive unit 1L and the second drive unit 1R are attached to the vehicle body. The power supply connecting portion 14R is on the same side (vehicle rear side Z2) in the vehicle longitudinal direction Z. However, since the reference position M08 is inclined by γ ° (20 °) from the horizontal plane, the first power supply connection portion 14L and the second power supply connection portion 14R are exactly the same position (a line with the vertical plane VF as a reference). It is not arranged at a symmetrical position. Thus, in 2nd embodiment, the case where the 1st power supply connection part 14L and the 2nd power supply connection part 14R are not arrange | positioned at the same position is included.

  In the second embodiment, similarly to the first embodiment, the detection reference position S0 of the first sensor stator 52L is arranged on the vertical plane VF passing through the rotation axis (rotation axis XC) of the first sensor stator 52L. . The detection reference position S0 of the second sensor stator 52R is disposed on a vertical plane VF that passes through the rotation axis (rotation axis XC) of the second sensor stator 52R. Thus, the first drive unit 1L and the second drive unit 1R have a positional relationship in which the positional relationship between the plurality of reference positions M01 to M08 of the stator 10 is inverted by 180 °, and the detection reference position S0 of the sensor stator 52 The positional relationship is the same.

  As shown in FIG. 6, in the second embodiment, in the first drive unit 1L in the intermediate vision MV, the detection reference position S0 is circumferential with respect to the reference position M06 that is closest to the second circumferential side C2. The first direction side C1 is set to be positive and is shifted by -β °. In other words, the angle formed by the detection reference position S0 and the reference position M06 around the rotation axis XC is set to β °. At this time, as shown in FIG. 6, the angle formed between the detection reference position S0 (vertical surface VF) and the reference position M06 around the rotation axis XC, and the angle formed between the vertical surface VF and the reference position M02 are They are the same β °. This is because the portion indicated by “●” in FIG. 6 is an angle formed by the straight line connecting the reference position M06 and the reference position M02 and the vertical plane VF, and is in a relationship of vertical angles with each other. .

  As shown in FIG. 6, in the second drive unit 1R in the intermediate vision MV, the positional relationship between the plurality of reference positions M01 to M08 is a positional relationship inverted by 180 ° with respect to the first drive unit 1L in the intermediate vision MV. It has become. At this time, the reference position that is closest to the detection reference position S0 on the second circumferential side C2 is the reference position M02. As described above, the angle formed by the detection reference position S0 and the reference position M02 with the rotation axis XC as the center is β °. In other words, in the second drive unit 1R in the intermediate vision MV, the detection reference position S0 is positive with respect to the reference position M02 positioned closest to the circumferential second side C2, with the circumferential first side C1 being positive. It will be placed out of position. Therefore, in the second drive unit 1R, similarly to the first drive unit 1L, it is possible to perform zero point correction by offsetting the detection reference position S0 by −β ° with the circumferential first side C1 being positive.

  Thus, according to the second embodiment, the first drive unit 1L and the second drive unit 1R can share the zero point correction, and as a result, the control can be prevented from becoming complicated.

  Also in the second embodiment, each of the first connecting member 24L (rotor hub 24) and the second connecting member 24R (rotor hub 24) is provided with a rotor positioning portion 24C and a sensor rotor positioning portion 24E. These positioning portions define the positional relationship in the circumferential direction C between the positioning reference position of the first rotor 20L and the positioning reference position of the first sensor rotor 51L, or the positioning reference position of the second rotor 20R and the second sensor. It defines the positional relationship in the circumferential direction C with the positioning reference position of the rotor 51R. As described above, by setting the relationship between any one of the plurality of reference positions M01 to M08 of the stator 10 and the detection reference position S0 of the sensor stator 52, the positional relationship between the rotor 20 and the sensor rotor 51 is also The first drive unit 1L and the second drive unit 1R have a positional relationship of being rotated 180 ° in the circumferential direction C. Since the rotor 20 and the sensor rotor 51 rotate, the positional relationship in the circumferential direction C between the positioning reference position of the first rotor 20L and the positioning reference position of the first sensor rotor 51L, and the positioning reference position of the second rotor 20R The positional relationship in the circumferential direction C with the positioning reference position of the second sensor rotor 51R is the same. Therefore, when the first drive unit 1L and the second drive unit 1R share the rotating electrical machine M and the rotation sensor S, the first connection member 24L (rotor hub 24) and the second connection member 24R (rotor hub 24) Thus, the positions of the rotor positioning portion 24C and the sensor rotor positioning portion 24E can be made common. Therefore, the first connecting member 24L (rotor hub 24) and the second connecting member 24R (rotor hub 24) can have a common configuration.

3. Other Embodiments Next, other embodiments of the vehicle drive device will be described.

(1) In the above embodiment, the example in which the plurality of reference positions M01 to M08 are set with the U-phase coil as a reference has been described. However, the present invention is not limited to such an example. A plurality of reference positions M01 to M08 may be set with reference to a V-phase coil or a W-phase coil.

(2) In the above embodiment, the example using the 8-pole rotor 20 and the corresponding stator coil 12 has been described. However, the present invention is not limited to such an example. The number of poles of the rotor 20 can be any number as long as it is an even number. In any case, a plurality of reference positions M01, M02... Corresponding to the number of poles are set.

(3) In the above embodiment, an example in which the first drive unit 1L and the second drive unit 1R drive the pair of left and right front wheels WL and WR has been described. However, the present invention is not limited to such an example. The first drive unit 1L and the second drive unit 1R may be configured to drive a pair of left and right rear wheels. Further, it may be configured to drive a pair of left and right front wheels and a pair of left and right rear wheels.

(4) In the above embodiment, the example in which the power supply connecting portion 14 is disposed on the vehicle rear side Z2 along the horizontal direction in the drive unit 1 has been described. However, the present invention is not limited to such an example. The power supply connection unit 14 may be disposed inclined from the horizontal direction.

(5) The configuration disclosed in each embodiment described above can be applied in combination with the configuration disclosed in another embodiment as long as no contradiction arises. Regarding other configurations, the embodiments disclosed herein are merely examples in all respects. Accordingly, various modifications can be made as appropriate without departing from the spirit of the present disclosure.

4). Outline of the above embodiment The outline of the above embodiment will be described below.

A vehicle drive device (D) including a pair of first drive unit (1L) and second drive unit (1R) for driving each of a pair of coaxially arranged wheels (W),
The first drive unit (1L) includes a first rotating electrical machine (ML) having a first rotor (20L) and a first stator (10L), a first sensor rotor (51L), and a first sensor stator (52L). A first rotation sensor (SL) having a first connection member (24L) connecting the first rotor (20L) and the first sensor rotor (51L), the first sensor stator (52L). Is mounted in a fixed position with respect to the first stator (10L),
The second drive unit (1R) includes a second rotating electrical machine (MR) having a second rotor (20R) and a second stator (10R), a second sensor rotor (51R), and a second sensor stator (52R). A second rotation sensor (SR) having a second connection member (24R) for connecting the second rotor (20R) and the second sensor rotor (51R), and the second sensor stator (52R). Is mounted in a fixed position with respect to the second stator (10R),
The first stator (10L) and the second stator (10R) have the same interval in the circumferential direction (C) of the plurality of reference positions (M01 to M08) and the plurality of reference positions (M01 to M08). The arrangement of the power supply connection part (14) for connecting the stator coil (12) and the power supply with respect to
A first power supply connection portion (14) that is the power supply connection portion (14) of the first stator (10L) when the first drive unit (1L) and the second drive unit (1R) are mounted on a vehicle body. 14L) and the second power supply connection part (14R) which is the power supply connection part (14) of the second stator (10R) are on the same side in the vehicle longitudinal direction (Z),
In the vehicle-mounted state, each of the first drive unit (1L) and the second drive unit (1R) is an intermediate view (MV) viewed from an intermediate position side in the axial direction (X) connecting them. The circumferential direction (C) position of any of the plurality of reference positions (M01 to M08) of the stator (10L) and any of the plurality of reference positions (M01 to M08) of the second stator (10R) are the same. The circumferential direction (C) of the detection reference position (S0) of the first sensor stator (52L) and the detection reference position (S0) of the second sensor stator (52R) are the same.

  According to this configuration, since the first connection portion (14L) and the second connection portion (14R) are on the same side in the vehicle front-rear direction (Z), the intermediate connection (MV) and the first connection portion (14L) Although it will be arranged at a position in the circumferential direction (C) different from the second connection portion (14R), any one of the plurality of reference positions (M01 to M08) of the first stator (10L) and the first sensor stator ( 52L) with respect to the detection reference position (S0) in the circumferential direction (C), and any of the plurality of reference positions (M01 to M08) of the second stator (10R) and the detection reference of the second sensor stator (52R). The positional relationship in the circumferential direction (C) with the position (S0) can be made the same in intermediate vision (MV). Therefore, for example, the first connecting member (24L) that connects the first rotor (20L) and the first sensor rotor (51L) in the first drive unit (1L), and the second rotor in the second drive unit (1R). (20R) and the second connecting member (24R) that connects the second sensor rotor (51R), and a circumferential direction (C) positioning mechanism such as a key groove, etc. The positional relationship in the circumferential direction (C) between the positioning reference position of the first rotor (20L) and the positioning reference position of the first sensor rotor (51L), the positioning reference position of the second rotor (20R), and the second sensor rotor ( The positional relationship in the circumferential direction (C) with the positioning reference position 51R) can be made the same. Therefore, when the rotating electrical machine (M) and the resolver (S) are shared by the first drive unit (1L) and the second drive unit (1R), the first connection member (24L) and the second connection The member (24R) can have a common configuration. Therefore, according to this configuration, the first drive unit (1L) and the second drive unit (1R) can share the rotating electrical machine (M), the resolver (S), and the connecting member (24). .

The first sensor stator (52L) and the second sensor stator (52R) each include a signal line connection portion (54) to which a detection signal line (53) is connected,
In the intermediate view (MV), the first sensor stator (52L) and the second sensor stator (52R) have the same arrangement of the signal line connection portion (54) with respect to the detection reference position (S0). It is preferable.

  According to this configuration, in addition to the configuration described above, the position in the circumferential direction (C) of the signal line connecting portion (54) of the first sensor stator (52L) and the signal line of the second sensor stator (52R) are further provided. The position of the connecting portion (54) in the circumferential direction (C) can be made the same in the intermediate view (MV).

  Further, in the in-vehicle state, any one of the plurality of reference positions (M01 to M08) of the first stator (10L) is disposed on a vertical plane (VF) including a rotation axis of the first stator (10L). Any one of the plurality of reference positions (M01 to M08) of the second stator (10R) is disposed on a vertical plane (VF) including a rotation axis of the second stator (10R), and the first sensor stator. The detection reference position (S0) of (52L) is disposed on the vertical plane (VF) including the rotation axis of the first sensor stator (52L), and the detection reference position (S0) of the second sensor stator (52R). ) Is preferably arranged on the vertical plane (VF) including the rotation axis of the second sensor stator (52R).

  According to this configuration, the rotating electrical machine (M) and the resolver (S) of the first drive unit (1L) and the rotating electrical machine (M) and the resolver (S) of the second drive unit (1R) are viewed in an intermediate view ( When the positional relationship is rotated 180 ° in the circumferential direction (C) in MV), the power supply connection portions of these units (1) (first power supply connection portion (14L), second power supply connection portion (14R)) Any of the plurality of reference positions (M01 to M08) and the detection reference position (S0) can be arranged in a mirror-symmetrical relationship with respect to the vertical plane (VF). Therefore, even when the rotating electric machine (M) and the resolver (S) are shared by the first drive unit (1L) and the second drive unit (1R), It is possible to easily connect the drive unit (1) and equipment on the vehicle (99) side such as the inverter (98).

  The technology according to the present disclosure can be used for a vehicle drive device including a pair of first drive units and second drive units for driving each of a pair of wheels arranged coaxially.

1: Drive unit 1L: 1st drive unit 1R: 2nd drive unit 10: Stator 10L: 1st stator 10R: 2nd stator 12: Stator coil 14: Power supply connection part 14L: 1st power supply connection part 14R: 2nd power supply Connection part 15: Coil part 20: Rotor 20L: First rotor 20R: Second rotor 24: Rotor hub (connection member)
24L: first connecting member 24R: second connecting member 51: sensor rotor 51L: first sensor rotor 51R: second sensor rotor 52: sensor stator 52L: first sensor stator 52R: second sensor stator 53: detection signal line 54 : Signal line connection part C: Circumferential direction C1: Circumferential direction first side C2: Circumferential direction second side D: Vehicle drive device M: Rotary electric machine ML: First rotary electric machine MR: Second rotary electric machine M01: Reference position M02 : Reference position M04: reference position M06: reference position M08: reference position MF: intermediate plane MV: intermediate view S: rotation sensor SL: first rotation sensor SR: second rotation sensor S0: detection reference position VF: vertical plane W: Wheel WL: Left wheel WR: Right wheel X: Axial direction X1: Axial inner side X2: Axial outer side Z: Vehicle front-rear direction Z1: Vehicle front side Z2: Vehicle rear side

Claims (3)

A vehicle drive device comprising a pair of first drive unit and second drive unit for driving each of a pair of coaxially arranged wheels,
The first drive unit includes a first rotating electric machine having a first rotor and a first stator, a first rotation sensor having a first sensor rotor and a first sensor stator, the first rotor, and the first sensor rotor. A first connecting member for connecting the first sensor stator to the first stator in a fixed position;
The second drive unit includes a second rotating electric machine having a second rotor and a second stator, a second rotation sensor having a second sensor rotor and a second sensor stator, the second rotor, and the second sensor rotor. A second connecting member for connecting the second sensor stator to the second stator in a fixed position;
The first stator and the second stator have the same circumferential interval at a plurality of reference positions, and the arrangement of power supply connection portions that connect the stator coil and the power supply to the plurality of reference positions is the same. ,
The first power supply connection portion that is the power supply connection portion of the first stator and the power supply connection portion of the second stator in a vehicle-mounted state in which the first drive unit and the second drive unit are attached to a vehicle body. The second power connection is on the same side of the vehicle longitudinal direction,
In the in-vehicle state, each of the first drive unit and the second drive unit is viewed from an intermediate position side in the axial direction connecting them, and any one of the plurality of reference positions of the first stator, The circumferential position of the second stator is the same as any one of the plurality of reference positions, and the circumferential position of the detection reference position of the first sensor stator and the detection reference position of the second sensor stator is the same. The vehicle drive device. The first sensor stator and the second sensor stator each include a signal line connecting portion to which a detection signal line is connected,
2. The vehicle drive device according to claim 1, wherein in the intermediate view, the first sensor stator and the second sensor stator have the same arrangement of the signal line connection portions with respect to the detection reference position.   In the in-vehicle state, any one of the plurality of reference positions of the first stator is disposed on a vertical plane passing through the rotation axis of the first stator, and any one of the plurality of reference positions of the second stator is the The second sensor stator is disposed on a vertical plane passing through the rotation axis of the second stator, the detection reference position of the first sensor stator is disposed on a vertical plane passing through the rotation axis of the first sensor stator, and the second sensor stator The vehicle drive device according to claim 1, wherein the detection reference position is disposed on a vertical plane passing through the rotation axis of the second sensor stator.

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