JP2023174374A - Mechanical and electrical integrated motor unit - Google Patents

Abstract

To provide a mechanical and electrical integrated motor unit capable of performing efficient cooling.SOLUTION: The mechanical and electrical integrated motor unit includes a motor and an inverter for driving the motor in which the motor and the inverter are placed adjacent to each other in the axial direction of the motor and integrated. The motor has an annular stator core and windings provided onto the stator core, in which a cooler is provided adjacent to the stator core, the windings, and the inverter in the radial direction of the stator core, which is the direction perpendicular to the axial direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a mechanical and electrical integrated motor unit.

Patent Document 1 discloses a technique in which a cooling passage is arranged between a motor and an inverter to cool both.

Japanese Patent Application Publication No. 05-292703

Patent Document 1 discloses a technique for sharing a cooling passage between a motor and an inverter, but does not take into consideration the arrangement and configuration for efficient cooling.

The present invention has been made in view of the above problems, and an object thereof is to provide a mechanical and electrical integrated motor unit that can perform efficient cooling.

In order to solve the above-mentioned problems and achieve the objects, a mechanical and electrical integrated motor unit according to the present invention includes a motor and an inverter that drives the motor, and the motor unit and the inverter drive the motor and the inverter in the axial direction of the motor. A mechanical and electrical integrated motor unit in which the motor has an annular stator core and a winding provided on the stator core, and the motor has a winding arranged on the stator core in a direction perpendicular to the axial direction. The present invention is characterized in that a cooler is provided adjacent to the stator core, the windings, and the inverter in the radial direction.

Thereby, the cooler can be shared by the motor and the inverter to perform efficient cooling.

Further, a mechanical and electrical integrated motor unit according to the present invention includes a motor and an inverter that drives the motor, and the motor and the inverter are integrated so as to be adjacent to each other in the axial direction of the motor. The motor has an annular stator core and a winding provided on the stator core, and a cooler is provided between the winding and the inverter in the axial direction. That is.

Thereby, the cooler can be shared by the motor and the inverter to perform efficient cooling.

Further, in the above, the stator core has an annular back yoke and a plurality of teeth protruding from the back yoke in a radial direction, and the winding wire is provided in a plurality of slots between each of the plurality of teeth. a slot conductor; and a plurality of crossover conductors that are electrically connected to a portion of the slot conductor protruding from the slot in the axial direction and electrically connect any of the slot conductors to each other. The plurality of wire conductors may be stacked at predetermined intervals in the axial direction.

Thereby, the height of the motor in the axial direction can be suppressed, and the mechanical and electrical integrated motor unit can be downsized.

Moreover, in the above, a thermally conductive insulator may be provided that covers the crossover conductor.

Thereby, while improving the insulation between the crossover conductors, heat is easily transferred from the crossover conductors to the cooler through the thermally conductive insulator, and cooling performance can be improved.

Moreover, in the above, a plurality of substrates may be provided on which the plurality of wire conductors are respectively arranged.

By stacking the boards on which the crossover conductors are arranged in the axial direction, the slot conductor and the crossover conductor are electrically connected on the end face side in the axial direction of the motor, and the height of the motor in the axial direction is This makes it possible to reduce the size of the mechanical and electrical integrated motor unit.

Moreover, in the above, a thermally conductive insulating layer may be provided on the substrate.

Thereby, while improving the insulation between the crossover conductors, heat is easily transferred from the crossover conductors to the cooler through the thermally conductive insulating layer, and cooling performance can be improved.

The mechanical and electrical integrated motor unit according to the present invention has the effect of being able to perform efficient cooling while sharing a cooling passage.

FIG. 1 is a diagram showing a schematic configuration of a mechanical and electrical integrated motor unit according to a first embodiment. FIG. 2 is a partial perspective view of the mechanical and electrical integrated motor unit according to the first embodiment, cut in the axial direction. FIG. 3 is a diagram showing a connection portion between a slot conductor and a crossover conductor. FIG. 4 is a diagram showing an example of the wiring of the crossover conductor. FIG. 5 is a partial cross-sectional view of the mechanical and electrical integrated motor unit according to the first embodiment, cut in the axial direction. FIG. 6 is an explanatory diagram of the heat radiation path from the motor and inverter to the cooler. FIG. 7 is a partial cross-sectional view taken in the axial direction of the electromechanical integrated motor unit when the inverter board extends from the outer peripheral side of the stator in the radial direction. FIG. 8 is a partial cross-sectional view of another example of the mechanical and electrical integrated motor unit according to the first embodiment, cut in the axial direction. FIG. 9 is an explanatory diagram of a heat radiation path from the motor and inverter to the cooler. FIG. 10 is an explanatory diagram of insulators provided on the board and slot conductor of the wiring section. FIG. 11 is a diagram showing a schematic configuration of a mechanical and electrical integrated motor unit according to the second embodiment. FIG. 12 is a partial perspective view of the mechanical and electrical integrated motor unit according to the second embodiment, cut in the axial direction. FIG. 13 is a partial cross-sectional view of the mechanical and electrical integrated motor unit according to the second embodiment, cut in the axial direction. FIG. 14 is an explanatory diagram of the heat radiation path from the motor and inverter to the cooler. FIG. 15 is a partial cross-sectional view of another example of the mechanical and electrical integrated motor unit according to the second embodiment, cut in the axial direction. FIG. 16 is an explanatory diagram of a heat radiation path from the motor and inverter to the cooler. FIG. 17(a) is a diagram showing an example of an inverter using discrete elements as semiconductor elements. FIG. 17(b) is a diagram showing an example of an inverter using a power module. FIG. 18(a) is a diagram showing the number of SiC chips when discrete elements are used as semiconductor elements. FIG. 18(b) is a diagram showing the number of SiC chips when a power module is used.

(Embodiment 1)
Embodiment 1 of the mechanical and electrical integrated motor unit according to the present invention will be described below. Note that the present invention is not limited to this embodiment.

FIG. 1 is a diagram showing a schematic configuration of a mechanical and electrical integrated motor unit 1 according to the first embodiment. As shown in FIG. 1, the electromechanical integrated motor unit 1 according to the embodiment includes a motor 2 and an inverter 3. The mechanical and electrical integrated motor unit 1 is mounted on, for example, an electric vehicle. The motor 2 is a rotating electrical machine including a rotor and a stator provided with a rotor shaft 21, and is driven by electric power supplied from a power source (not shown) via an inverter 3. In the electromechanical integrated motor unit 1 according to the first embodiment, the motor 2 and the inverter 3 are connected in the axial direction of the rotor shaft 21 of the motor 2 via the wire connecting part 4 as a coil end part in the stator of the motor 2 in the axial direction. It is a drive unit (mechanical and electrical integrated device) in which the two are stacked and integrated.

FIG. 2 is a partial perspective view of the mechanical and electrical integrated motor unit 1 according to the first embodiment, cut in the axial direction. In addition, in FIG. 2, illustration of the rotor that constitutes the motor 2 is omitted.

The stator 22 of the motor 2 has a cylindrical stator core 221. Stator core 221 includes an annular back yoke 222 and a plurality of teeth 223 extending radially inward from back yoke 222, and slots 224 are formed between the plurality of teeth 223 in the circumferential direction. Although the number of slots 224 is arbitrary, in this embodiment, as an example, it is 48 slots. A plurality of slot conductors 225, which are columnar conductors extending in the axial direction, are arranged in the slot 224. Then, by passing a current through the slot conductor 225, a magnetic field for applying driving force to the rotor can be generated.

The inverter 3 includes an inverter board 31, a plurality of semiconductor elements 32 provided on the inverter board 31, a wiring pattern (not shown), and the like. The inverter 3 is electrically connected to a battery (not shown) and the slot conductor 225 of the motor 2, and controls the drive of the motor 2 by controlling the electric power supplied to the motor 2 from the battery. Note that the semiconductor elements 32 and wiring patterns constituting the inverter 3 are not limited to being provided on the inverter board 31; for example, they may be built into the wiring section 4, or may be provided separately from the inverter board 31. It is also possible to configure and mount it on the upper part of the inverter board 31.

The wire transfer portion 4 constitutes a so-called coil end portion of the winding (stator coil) of the stator 22. As shown in FIGS. 3 and 4, the wiring section 4 is provided on the end surface of the stator core 221 in the axial direction, and connects arbitrary slot conductors 225 to each other on the end surface side of the back yoke 222 in the axial direction. A plurality of crossover conductors 41 are provided for connecting to. Each of the plurality of crossover conductors 41 is made of a plate-shaped thick copper conductor. For example, as shown in FIG. 3, the crossover conductor 41 is electrically connected to a protruding portion of the slot conductor 225 that protrudes from inside the slot 224 in the axial direction. In addition, as a joining method for electrically connecting the crossover conductor 41 and the slot conductor 225, for example, soldering, welding, fitting, etc. can be applied. Further, the plurality of wire conductors 41 each extend radially from the slot 224 side to the back yoke 222 side in the radial direction of the stator 22, are arranged concentrically above the back yoke 222, and are spaced at predetermined intervals in the axial direction. It is laminated.

In the electromechanical integrated motor unit 1 according to the first embodiment, by configuring the slot conductor 225 and the crossover conductor 41 with different conductors, the cross-sectional area of each conductor is made the same, and the cross-sectional area of the conductor is can take an appropriate cross-sectional shape. As an example, the slot conductor 225 has a conductor cross-sectional shape close to a square so as to follow the shape of the slot 224, and the crossover conductor 41 is a flat plate so as to suppress the height direction of the coil end portion of the stator 22. By arranging conductors of the shape, it is possible to reduce the size of the mechanical and electrical integrated motor unit 1. Furthermore, in the electromechanical integrated motor unit 1 according to the first embodiment, the inverter 3 can be disposed not only above the back yoke 222 but also above the slot 224 in the axial direction, while suppressing an increase in dimension in the axial direction. , it is possible to provide a mechanical and electrical integrated motor unit 1 in which the inverter 3 is disposed on the end side of the stator 22 in the axial direction. Furthermore, in the mechanical and electrical integrated motor unit 1 according to the first embodiment, the wiring connecting the motor 2 and the inverter 3 can be shortened, so that it is possible to reduce power loss.

The cooling device is provided to cool the mechanical and electrical integrated motor unit 1 using cooling water. This cooling device includes a water pump, a cooler 5, a radiator, and the like. The water pump is, for example, electric and is provided to circulate the coolant in the coolant circuit. In the cooler 5, a flow path 52 through which a cooling liquid 53 flows is formed inside a rectangular flow path forming member 51. 3 (inverter board 31). The radiator is provided to cool the coolant 53 with the outside air by exchanging heat between the coolant 53 flowing inside and the outside air.

In the electromechanical integrated motor unit 1 according to the first embodiment, the flow path forming member 51 of the cooler 5 is connected to the outer circumferential surface of the stator core 221, the outer circumferential surface of the insulating material 42 of the wiring section 4, and the inverter 3 (inverter board 31). It is configured to be in contact with the outer circumferential surface of the housing via a thermally conductive insulating sheet 62, which is a highly thermally conductive insulator. Thereby, the stator core 221, the crossover section 4, and the inverter 3 each share the cooler 5, allowing efficient cooling to be performed.

FIG. 5 is a partial cross-sectional view of the mechanical and electrical integrated motor unit 1 according to the first embodiment, cut in the axial direction.

In addition, in the mechanical and electrical integrated motor unit 1 according to the first embodiment, as shown in FIG. By molding, heat is easily transferred from the crossover conductor 41 to the cooler 5 through the insulating material 42, and cooling performance can be improved, while improving the insulation between the crossover conductors. In addition, the code|symbol 61 in FIG. 5 is a thermally conductive insulating sheet which is a highly thermally conductive insulator interposed between the inverter board 31 of the inverter 3 and the insulating material 42 of the wiring part 4.

Here, the heat generated by the motor 2 is mainly caused by copper loss caused by current flowing through the slot conductor 225 and the crossover conductor 41. As shown in FIG. 6, the heat from the slot conductor 225 passes through the stator core 221 in the radial direction to reach the cooler 5, and the insulating material 42 in the radial direction to reach the cooler 5. exists. Furthermore, as shown in FIG. 6, the heat from the crossover conductor 41 has a path through which it passes through the insulating material 42 in the radial direction and reaches the cooler 5. In the inverter 3, the heat from the semiconductor elements 32 passes through the inverter board 31 in the radial direction to reach the cooler 5, and the insulating material 42 of the wiring section 4 from the inverter board 31 in the radial direction. There is a route that reaches the cooler 5. In the electromechanical integrated motor unit 1 according to the first embodiment, the heat from the inverter 3 reaches the cooler 5 via the insulating material 42 of the wiring section 4, so that the heat of the motor 2 and the inverter are separated in the wiring section 4. However, by using a highly thermally conductive material as the insulating material 42 of the wire transfer portion 4, heat radiation from the motor 2 and the inverter 3 can be realized with a single cooler 5. This allows the motor 2 and the inverter 3 to share the flow path 52 of the cooler 5, thereby reducing water pump loss, compressing space, and simplifying the cooling system. Further, in the mechanical and electrical integrated motor unit 1 according to the first embodiment, size reduction can be achieved by adopting a cooling structure for simultaneously dissipating heat from the motor 2 and the inverter 3 to the cooler 5.

Further, as shown in FIG. 7, the electromechanical integrated motor unit 1 according to the first embodiment has a shape in which the inverter board 31 of the inverter 3 protrudes from the outer peripheral side of the stator 22 in the radial direction, and the inverter board 31 and the cooler 5 are connected to each other. It may be configured to contact the flow path forming member 51. Thereby, heat is easily radiated from the inverter board 31 to the cooler 5, and the ability of the cooler 5 to cool the inverter 3 can be improved.

In the electromechanical integrated motor unit 1 according to the first embodiment, a plurality of thin ring-shaped substrates each having a plurality of wire conductors 41 arranged on the circumference are laminated in the axial direction to form a wire wire portion as a coil end portion of the stator 22. 4 may be configured.

FIG. 8 is a partial cross-sectional view of another example of the mechanical and electrical integrated motor unit 1 according to the first embodiment, cut in the axial direction.

As the mechanical and electrical integrated motor unit 1 according to the first embodiment, the mechanical and electrical integrated motor unit 1 shown in FIG. The wiring section 4 is constructed by laminating them. Note that the number of substrates 43 to be stacked is not limited to eight as shown in FIG. 8. The crossover conductor 41 is electrically connected to the protruding portion of the slot conductor 225 protruding from the slot 224 in the axial direction so as to connect arbitrary slot conductors 225 on the same board 43. In addition, in the electromechanical integrated motor unit 1 shown in FIG. 8, the connecting conductor 41 is arranged on the board 43, but a printed circuit board or a thick copper board in which a conductor is bonded to prepreg may also be used.

For joining the slot conductor 225 and the connecting wire conductor 41, the slot conductor 225 is placed in the slot 224 of the stator 22 in advance, and then the connecting wire conductor 41, which is integrated for each layer, is covered one layer at a time. After the slot conductor 225 and the crossover conductor 41 are bonded, the next layer is stacked and bonded above them. As for the method of joining these slot conductors 225 and the crossover conductor 41, soldering, welding, fitting, 3D printing, etc. can be used. Furthermore, instead of just layering the conductor layer by layer, it is also possible to layer a plurality of layers at the same time, or by integrating the wire conductor forming the coil end portion on one side of the stator 22 in the axial direction, and then integrating the wire conductor with the slot conductor 225. A method of joining may also be used. Alternatively, the connecting wire conductor 41 and the slot conductor 225 may be formed together and then attached to the stator 22.

FIG. 9 is an explanatory diagram of a heat radiation path from the motor 2 and inverter 3 to the cooler 5.

As shown in FIG. 9, the heat from the slot conductor 225 passes through the stator core 221 in the radial direction to reach the cooler 5, and the heat passes through the substrate 43 of the transfer section 4 in the radial direction to reach the cooler 5. There is a route to reach . Furthermore, there is a path for the heat from the crossover conductor 41 to pass through the substrate 43 in the radial direction and reach the cooler 5 . In the inverter 3, the heat from the semiconductor elements 32 is transmitted to the cooler 5 by adding the inverter board 31 in the radial direction, and is transmitted from the inverter board 31 to the board 43 of the transfer section 4 in the axial direction, and the heat is transferred to the board 43. There is a path that passes in the radial direction and reaches the cooler 5. As a result, in the mechanical and electrical integrated motor unit 1 shown in FIGS. 8 and 9, heat radiation between the motor 2 and the inverter 3 can be achieved with one cooler 5. By sharing the flow path 52, it is possible to reduce water pump loss, compress space, and simplify the cooling system.

In addition, in the electromechanical integrated motor unit 1 shown in FIGS. 8 and 9, at a location where the connecting wire conductors 41 overlap in the axial direction in the connecting wire portion 4, the connecting wire conductors 41 having different potentials may be close to each other. Therefore, for example, as shown in FIG. 10, it is preferable to provide an insulating layer 44 made of an insulator on the back surface of the substrate 43 (the surface on the stator core 221 side in the axial direction). Thereby, the insulation between the crossover conductors 41 can be improved. Furthermore, by providing the insulating layer 44 on the back surface of the substrate 43, heat is easily transferred from the crossover conductor 41 to the cooler 5 through the insulating layer 44, and cooling performance can be improved. Further, it is preferable that the slot conductor 225 covers a conductor portion not electrically connected to the crossover conductor 41 with an insulating coating 226 made of an insulator. Thereby, the insulation between the slot conductor 225 and the crossover conductor 41 and the insulation between adjacent slot conductors 225 can be improved.

In addition, in the electromechanical integrated motor unit 1 according to the first embodiment, when a plurality of boards 43 provided with the wire conductor 41 are stacked in the axial direction, between the layers adjacent in the axial direction (between the boards 43 adjacent in the axial direction) It may also be configured such that a highly thermally conductive insulating material is sandwiched between the two. Thereby, heat dissipation from the motor 2 and inverter 3 to the cooler 5 can be improved while increasing the insulation.

(Embodiment 2)
Embodiment 2 of the mechanical and electrical integrated motor unit according to the present invention will be described below. Note that the present invention is not limited to this embodiment. Note that in this embodiment, descriptions of parts similar to those in Embodiment 1 will be omitted as appropriate.

FIG. 11 is a diagram showing a schematic configuration of a mechanical and electrical integrated motor unit 1 according to the second embodiment. FIG. 12 is a partial perspective view of the electromechanical integrated motor unit 1 according to the second embodiment, cut in the axial direction. FIG. 13 is a partial cross-sectional view of the electromechanical integrated motor unit 1 according to the second embodiment, cut in the axial direction. Note that the configuration of the wiring section 4 of the mechanical and electrical integrated motor unit 1 shown in FIG. 13 is similar to the configuration of the wiring section 4 of the mechanical and electrical integrated motor unit 1 shown in FIG. 5 in the first embodiment.

In the electromechanical integrated motor unit 1 according to the second embodiment, as shown in FIGS. 11, 12, and 13, a cooler 5 is sandwiched between the transfer portion 4 of the motor 2 and the inverter 3 in the axial direction. It is placed. In the mechanical and electrical integrated motor unit 1 according to the second embodiment, as shown in FIG. A thermally conductive insulating sheet 63 is interposed between the wiring section 4 (insulating material 42) and the cooler 5 (channel forming member 51), and the thermally conductive insulating sheet 64 is made of a highly thermally conductive insulator. is interposed. Note that at least one of the thermally conductive insulating sheets 63 and 64 may be omitted.

FIG. 14 is an explanatory diagram of a heat radiation path from the motor 2 and inverter 3 to the cooler 5.

In the electromechanical integrated motor unit 1 according to the second embodiment, as shown in FIG. There is a path in which the heat transmitted to the stator core 221 passes through the insulating material 42 of the crossover portion 4 in the axial direction and reaches the cooler 5. Further, there is a path for the heat from the crossover conductor 41 to pass through the insulating material 42 in the axial direction and reach the cooler 5. In the inverter 3, the heat from the semiconductor element 32 reaches the cooler 5 from the surface of the flow path forming member 51 on the opposite side to the wiring section 4 side in the axial direction by adding the inverter board 31 in the axial direction. A route exists.

In the electromechanical integrated motor unit 1 according to the second embodiment, heat radiation from the motor 2 and heat radiation from the inverter 3 are performed separately from both surfaces facing each other in the axial direction of the flow path forming member 51 in the cooler 5. There is no interference until the heat reaches the cooler 5, and the heat can be efficiently transferred to the cooling liquid 53. As a result, in the electromechanical integrated motor unit 1 according to the second embodiment, heat dissipation between the motor 2 and the inverter 3 can be achieved with one cooler 5, and the motor 2 and the inverter 3 are connected to the flow path of the cooler 5. By sharing the water pump 52, it is possible to reduce water pump loss, compress space, and simplify the cooling system. Further, in the mechanical and electrical integrated motor unit 1 according to the second embodiment, size reduction can be achieved by adopting a cooling structure for simultaneously dissipating heat from the motor 2 and the inverter 3 to the cooler 5.

In addition, in the electromechanical integrated motor unit 1 according to the second embodiment, a plurality of thin ring-shaped substrates each having a plurality of wire conductors 41 arranged on the circumference are laminated in the axial direction to serve as a wire end portion of the stator 22. The wire portion 4 may also be configured.

FIG. 15 is a partial cross-sectional view of another example of the mechanical and electrical integrated motor unit 1 according to the second embodiment, cut in the axial direction.

The configuration of the transition section 4 of the mechanical and electrical integrated motor unit 1 shown in FIG. 15 is similar to the configuration of the transition section 4 of the mechanical and electrical integrated motor unit 1 shown in FIG. A cooler 5 is sandwiched between the section 4 and the inverter 3. In the electromechanical integrated motor unit 1 shown in FIG. 15, a thermally conductive insulating sheet 63 made of a highly thermally conductive insulator is provided between the inverter 3 (inverter board 31) and the cooler 5 (flow path forming member 51). A thermally conductive insulating sheet 64 made of a highly thermally conductive insulator is interposed between the wiring portion 4 (insulating material 42) and the cooler 5 (flow path forming member 51). Note that at least one of the thermally conductive insulating sheets 63 and 64 may be omitted.

FIG. 16 is an explanatory diagram of a heat radiation path from the motor 2 and inverter 3 to the cooler 5.

As shown in FIG. 16, the heat from the slot conductor 225 is transmitted to the board 43 of the wiring section 4 in the axial direction and reaches the cooler 5, and the heat is transmitted to the stator core 221 and then transmitted to the wiring section 4 in the axial direction. There is a path through which the light is transmitted to the substrate 43 and reaches the cooler 5. Further, there is a path through which the heat from the crossover conductor 41 is transmitted to the substrate 43 in the axial direction and reaches the cooler 5. In the inverter 3, the heat from the semiconductor elements 32 is transmitted to the inverter board 31 in the axial direction, and reaches the cooler 5 from the surface of the flow path forming member 51 on the opposite side to the wiring section 4 side in the axial direction. exists.

As a result, in the mechanical and electrical integrated motor unit 1 shown in FIGS. By sharing the flow path 52, it is possible to reduce water pump loss, compress space, and simplify the cooling system.

FIG. 17A is a diagram showing an example of an inverter 3 using a discrete element as the semiconductor element 32. FIG. 17(b) is a diagram showing an example of the inverter 3 using the power module 320. FIG. 18A is a diagram showing the number of switching elements 32a (for example, Si chips, SiC chips, GaN chips, etc.) when a discrete element is used as the semiconductor element 32. FIG. 18(b) is a diagram showing the number of switching elements 320a when the power module 320 is used.

In the electromechanical integrated motor unit 1 according to the second embodiment, as shown in FIG. 17(a), for example, a discrete element can be used as the semiconductor element 32 provided on the inverter board 31 as the inverter 3. As shown in b), a power module 320 may be used. As a result, in the electromechanical integrated motor unit 1 according to the second embodiment, for example, as shown in FIG. 18(a), a discrete element is used as the semiconductor element 32, and the semiconductor element per leg is By using the power module 320, the number of power modules 320 per leg is reduced within the same mounting area, as shown in FIG. It becomes possible to increase the number of switching elements 320a to four. Furthermore, by using the power module 320, the inverter board 31 can be omitted in the heat dissipation path from the switching element 320a to the cooler 5, so that thermal resistance can be reduced.

1 Mechanical and electrical integrated motor unit 2 Motor 3 Inverter 4 Wire section 5 Cooler 21 Rotor shaft 22 Stator 31 Inverter board 32 Semiconductor element 32a Switching element 41 Wire conductor 42 Insulating material 43 Substrate 44 Insulating layer 51 Channel forming member 52 Channel 53 Coolant 61, 62, 63, 64 Thermal conductive insulating sheet 221 Stator core 222 Back yoke 223 Teeth 224 Slot 225 Slot conductor 226 Insulating coating 320 Power module 320a Switching element

Claims (6)

motor and
an inverter that drives the motor;
Equipped with
A mechanical and electrical integrated motor unit in which the motor and the inverter are adjacent to each other and integrated in the axial direction of the motor,
The motor has an annular stator core and a winding provided on the stator core,
A mechanical and electrical integrated motor unit characterized in that a cooler is provided adjacent to the stator core, the windings, and the inverter in a radial direction of the stator core, which is a direction perpendicular to the axial direction. motor and
an inverter that drives the motor;
Equipped with
A mechanical and electrical integrated motor unit in which the motor and the inverter are adjacent to each other and integrated in the axial direction of the motor,
The motor has an annular stator core and a winding provided on the stator core,
A mechanical and electrical integrated motor unit, characterized in that a cooler is sandwiched between the winding and the inverter in the axial direction. The stator core has an annular back yoke and a plurality of teeth protruding from the back yoke in a radial direction,
The winding is electrically connected to a plurality of slot conductors provided in slots between each of the plurality of teeth and a portion of the slot conductor that protrudes from the slot in the axial direction, and is electrically connected to any of the slot conductors. It is composed of a plurality of crossover conductors that electrically connect the wires to each other,
The electromechanical integrated motor unit according to claim 1 or 2, wherein the plurality of wire conductors are stacked at predetermined intervals in the axial direction. The mechanical and electrical integrated motor unit according to claim 3, further comprising a thermally conductive insulator that covers the crossover conductor. The mechanical and electrical integrated motor unit according to claim 3, further comprising a plurality of substrates on which the plurality of wire conductors are respectively arranged. The mechanical and electrical integrated motor unit according to claim 5, wherein a thermally conductive insulating layer is provided on the substrate.

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