JP7825366B2 - Electromechanical integrated motor unit - Google Patents

Description

The present invention relates to an integrated electromechanical motor unit.

Patent Document 1 discloses an integrated electromechanical motor unit in which an inverter case is placed closely above a motor case, integrating the motor and inverter into a single unit.

Japanese Patent Application Laid-Open No. 2000-166176

The electromechanical integrated motor unit disclosed in Patent Document 1 requires the height of an inverter case in addition to a motor case, making it difficult to reduce its size.

The present invention was made in consideration of the above-mentioned problems, and its purpose is to provide an integrated electromechanical motor unit that can be made smaller.

In order to solve the above-mentioned problems and achieve the objectives, the electromechanical integrated motor unit of the present invention comprises a motor and an inverter that drives the motor, and is an integrated electromechanical motor unit in which the motor and the inverter are adjacent to each other in the axial direction of the motor. The motor has a stator core having an annular back yoke and a plurality of teeth protruding radially from the back yoke, a plurality of slot conductors provided in slots between each of the plurality of teeth, and a plurality of crossover conductors that are electrically connected to the portions of the slot conductors that protrude from the slots in the axial direction and electrically connect any of the slot conductors together, and the plurality of crossover conductors are stacked at predetermined intervals in the axial direction.

This reduces the axial height of the motor, allowing for the miniaturization of the integrated electromechanical motor unit.

Furthermore, in the above configuration, the multiple crossover conductors may each be plate-shaped, extend radially from the slot side toward the back yoke, and be arranged concentrically above the back yoke.

This allows for higher conductor density within the same layer.

In addition, in the above configuration, an insulator may be provided to cover the crossover conductor.

This improves the insulation between the crossover conductors.

Furthermore, in the above configuration, multiple substrates may be provided on which the multiple crossover conductors are respectively arranged.

As a result, by stacking the boards on which the crossover conductors are arranged in the axial direction, the slot conductors and the crossover conductors are electrically connected at the end faces in the axial direction of the motor, reducing the axial height of the motor and making it possible to miniaturize the electromechanical integrated motor unit.

In the above, an insulating layer may also be provided on the substrate.

This improves the insulation between the crossover conductors.

In addition, in the above configuration, an insulator may be provided to cover the slot conductors except for the portions electrically connected to the crossover conductors.

This improves the insulation between the slot conductor and the crossover conductor, as well as the insulation between adjacent slot conductors.

The electromechanical integrated motor unit of the present invention has the advantage of reducing the axial height of the motor, thereby enabling miniaturization.

FIG. 1 is a diagram showing a schematic configuration of a mechanically and electrically integrated motor unit according to a first embodiment. FIG. 2 is a partial perspective view of the mechanically and electrically 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 wiring of a crossover conductor. FIG. 5 shows a case where four systems of stator windings are provided in parallel to multiplex the inverter. FIG. 6 is a diagram showing an example of an inverter in which an inverter board is divided into two equal parts in the circumferential direction and multiplexed. FIG. 7 is an explanatory diagram of the mounting area of the inverter. FIG. 8 is a diagram showing another example of the wiring of the crossover conductor. FIG. 9 is a partial cross-sectional view of the mechanically and electrically integrated motor unit according to the first embodiment, taken along the axial direction. FIG. 10 is a partial perspective view of the mechanically and electrically integrated motor unit according to the second embodiment, cut in the axial direction. FIG. 11 is a partial cross section of the mechanically and electrically integrated motor unit according to the second embodiment, cut in the axial direction. FIG. 12 is an explanatory diagram of an example of an insulator provided on the substrate and slot conductor of the crossover portion. FIG. 13 is an explanatory diagram showing an example of the shape of the slot conductor. FIG. 14 is a diagram showing an example of a three-phase conductor pattern formed on the same substrate. FIG. 15 is a diagram showing an example of an inverter configured using a sector-shaped substrate on which a conductor pattern is formed. FIG. 16 is an explanatory diagram of a case where the space directly above the teeth and slots is used as a connection area between the slot conductor and the crossover conductor.

(Embodiment 1)
A first embodiment of the mechanically and electrically integrated motor unit according to the present invention will be described below. However, the present invention is not limited to this embodiment.

Figure 1 shows the schematic configuration of the mechanically and electrically integrated motor unit 1 according to the first embodiment.

As shown in FIG. 1, the electromechanical integrated motor unit 1 according to this embodiment is composed of a motor 2 and an inverter 3. The electromechanical integrated motor unit 1 is mounted, for example, on an electric vehicle. The motor 2 is a rotating electric machine composed of a rotor with a rotor shaft 21 and a stator, and is driven by power supplied from a power source (not shown) via an inverter 3. The electromechanical integrated motor unit 1 according to this embodiment is a drive unit (electromechanical integrated device) in which the motor 2 and the inverter 3 are stacked in the axial direction of the rotor shaft 21 of the motor 2 via connecting wire portions 4, which serve as coil ends in the axial direction of the stator 22 of the motor 2. Note that, in the electromechanical integrated motor unit 1 according to this embodiment, the stator 22 has four electrically independent winding systems; however, the present invention can also be applied to cases in which the number of winding systems is one, two, or three.

Figure 2 is a partial perspective view of the mechanically and electrically integrated motor unit 1 according to embodiment 1, cut in the axial direction. Note that the rotor that constitutes the motor 2 is not shown in Figure 2.

The stator 22 of the motor 2 has a cylindrical stator core 221. The stator core 221 includes an annular back yoke 222 and a plurality of teeth 223 extending radially inward from the back yoke 222, with slots 224 formed between the plurality of teeth 223 in the circumferential direction. The number of slots 224 is arbitrary, but in this embodiment, as an example, there are 48 slots 224. A plurality of slot conductors 225, which are columnar conductors extending in the axial direction, are arranged in the slots 224. In this embodiment, four slot conductors 225 are arranged for each slot 224.

Figure 3 shows the connection between the slot conductor 225 and the crossover conductor 41. Figure 4 shows an example of the wiring of the crossover conductor 41.

The crossover section 4 constitutes the so-called coil end section of the winding (stator coil) of the stator 22. As shown in Figures 3 and 4, the crossover section 4 is provided on the end face of the stator core 221 in the axial direction, and multiple crossover conductors 41 are provided on the axial end face side of the back yoke 222 to electrically connect any two slot conductors 225 together. Each of the multiple crossover conductors 41 is made of a plate-shaped thick copper conductor. Furthermore, the multiple crossover conductors 41 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 stacked at predetermined intervals in the axial direction.

As shown in Figure 3, the crossover conductor 41 is electrically connected to the protruding portion of the slot conductor 225 that protrudes from within the slot 224 in the axial direction of the slot conductor 225. Note that methods that can be used to electrically connect the crossover conductor 41 and the slot conductor 225 include, for example, soldering, welding, and fitting.

In the electromechanical integrated motor unit 1 according to embodiment 1, three-phase AC power is supplied from the inverter 3 to the windings of the stator 22, which are composed of the slot conductors 225 and the crossover conductors 41, causing current to flow, thereby generating a magnetic field that provides driving force to the rotor of the motor 2.

As shown in FIG. 2, the inverter 3 is composed of an inverter board 31, as well as multiple semiconductor elements 32 and wiring patterns (not shown) mounted on the inverter board 31. The inverter 3 is electrically connected to a battery (not shown) and the slot conductors 225 of the motor 2, and controls the drive of the motor 2 by controlling the power supplied from the battery to the motor 2. The semiconductor elements 32 and wiring patterns that make up the inverter 3 do not have to be mounted on the inverter board 31; for example, they may be built into the crossover section 4, or they may be configured separately from the inverter board 31 and mounted on top of the inverter board 31. The inverter 3 may be a printed circuit board equipped with discrete power elements, or a switching module in which power elements are integrated into a case.

In the electromechanical integrated motor unit 1 according to the first embodiment, a multiplexed structure is adopted in which inverters 3 are placed on both axial end faces of the motor 2, thereby multiplexing the system and ensuring redundancy.

Figure 5 shows a case where four windings of the stator 22 are arranged in parallel to multiplex the inverter 3.

In the electromechanical integrated motor unit 1 according to the first embodiment, as shown in FIG. 5, the stator 22 has four electrically independent winding systems: a first winding system 40A, a second winding system 40B, a third winding system 40C, and a fourth winding system 40D. The windings (conductors) of the stator 22 are connected in a closed winding configuration, with each system being star-connected. The windings of the stator 22 may also be connected as open windings without a neutral point, thereby improving redundancy. The four winding systems, the first winding system 40A, the second winding system 40B, the third winding system 40C, and the fourth winding system 40D, are connected to the corresponding four inverters: a first inverter system 30A, a second inverter system 30B, a third inverter system 30C, and a fourth inverter system 30D. The four systems, first system inverter 30A, second system inverter 30B, third system inverter 30C, and fourth system inverter 30D, are connected in series to each other and are supplied with DC power from a power source 5 connected to the first inverter system 4A. The DC power supplied to the first system inverter 30A, second system inverter 30B, third system inverter 30C, and fourth system inverter 30D is converted into AC power appropriate for each system and supplied to the first system winding 40A, second system winding 40B, third system winding 40C, and fourth system winding 40D.

Note that while an example is shown here in which the windings of the stator 22 are connected in four parallel configurations (four parallel configurations), this is not limited to a four-parallel configuration (four parallel configurations). In other words, redundancy can be improved by having two or more electrically independent winding systems on the stator 22 and a two or more parallel configuration (two or more parallel configurations) for the windings of the stator 22.

Figure 6 shows an example of an inverter 3 in which the inverter board 31 is divided into two equal parts in the circumferential direction and multiplexed.

As shown in Figure 6, in the electromechanical integrated motor unit 1 according to embodiment 1, two sets of three-phase power modules 320U, 320V, and 320W (U, V, and W phases) are provided on inverter boards 31, one on each end of the motor 2 in the axial direction. Each of the three-phase power modules 320U, 320V, and 320W is composed of four semiconductor elements 32, etc.

Specifically, in the electromechanical integrated motor unit 1 according to embodiment 1, as shown in FIG. 6, the inverter board 31 on one side of the motor 2 is divided into two equal circumferential halves along the axial direction, with the first set of three-phase power modules 320U, 320V, and 320W arranged on one side to form the first-system inverter 30A, and the second set of three-phase power modules 320U, 320V, and 320W arranged on the other side to form the second-system inverter 30B. Similarly, although not shown, the inverter board 31 on the remaining side of the motor 2 is divided into two equal circumferential halves along the axial direction, with the first set of three-phase power modules 320U, 320V, and 320W arranged on one side to form the third-system inverter 30C, and the second set of three-phase power modules 320U, 320V, and 320W arranged on the other side to form the fourth-system inverter 30D. In this way, by adopting a configuration in which the inverter 3 is multiplexed using the first system inverter 30A to the fourth system inverter 30D, redundancy can be improved. The number of inverters 3 provided on one side of the motor 2 in the axial direction is not limited to two systems; redundancy can be improved by providing two or more systems. Furthermore, the three-phase power modules 320U, 320V, 320W arranged on the inverter board 31 may be one set, or three or more sets.

Figure 7 is an explanatory diagram of the mounting area of the inverter 3.

In the electromechanical integrated motor unit 1 according to embodiment 1, as shown in FIG. 7 , the radial size of the inverter board 31 may be such that the inner edge 31a and outer edge 31b of the inverter board 31 extend beyond the inner and outer diameters of the stator core 221. This allows for a larger mounting area for semiconductor elements 32 and the like on the inverter board 31 than when the inner edge 31a and outer edge 31b of the inverter board 31 do not extend beyond the inner and outer diameters of the stator core 221. This reduces the volume of the inverter 3 in the axial direction, enabling the electromechanical integrated motor unit 1 to be miniaturized while maintaining redundancy.

In the electrically and mechanically integrated motor unit 1 according to the first embodiment, the windings of the stator 22 are formed by electrically connecting the slot conductors 225 and the connecting wire conductors 41, and by forming the slot conductors 225 and the connecting wire conductors 41 from separate conductors, each conductor can have an appropriate cross-sectional shape depending on where it is placed. As an example, the slot conductors 225 have a nearly square cross-sectional shape that conforms to the shape of the slots 224, while the connecting wire conductors 41 are plate-shaped conductors that are positioned to reduce the axial height of the connecting wire portions 4, thereby enabling the electrically and mechanically integrated motor unit 1 to be made smaller.

Furthermore, in the electrically-mechanical integrated motor unit 1 according to embodiment 1, the inverter 3 can be arranged not only above the back yoke 222 in the axial direction but also above the slot 224, making it possible to provide an electrically-mechanical integrated motor unit 1 in which the inverter 3 is arranged at the end of the motor 2 in the axial direction while minimizing increases in axial dimensions. Furthermore, in the electrically-mechanical integrated motor unit 1 according to embodiment 1, the wiring connecting the motor 2 and the inverter 3 can be shortened, making it possible to reduce power loss.

Here, the slot conductors 225 extending axially from the slots 224 and the crossover conductors 41 extending radially from the back yoke 222 are electrically connected at their intersections using soldering, laser welding, or interlocking joints. In this case, if the connection portions of the slot conductors 225 and the crossover conductors 41 are adjacent within the same plane (same layer), the insulation distance between the adjacent connection portions becomes short, potentially causing a short circuit between the slot conductors 225. To prevent such short circuits between adjacent connection portions, for example, as shown in Figure 8, by widening the spacing between the connection portions of the slot conductors 225 and the crossover conductors 41 within the same plane (same layer) so that insulation distance L1 is achieved, it becomes possible to connect the slot conductors 225 and the crossover conductors 41 while maintaining insulation, thereby improving insulation.

Figure 9 is a partial cross-sectional view of the mechanically and electrically integrated motor unit 1 according to the first embodiment, cut in the axial direction. Note that the reference numeral 61 in Figure 9 denotes an insulating sheet interposed between the inverter board 31 of the inverter 3 and the insulating material 60 of the crossover wire portion 4.

At points in the crossover section 4 where the crossover conductors 41 overlap in the axial direction, crossover conductors 41 with different potentials may be in close proximity. For this reason, as shown in Figure 9, it is preferable to mold each of the multiple crossover conductors 41 by covering (wrapping) them with insulating material 60, which is an insulator. This improves the insulation between the crossover conductors 41.

In the electrically and mechanically integrated motor unit 1 of embodiment 1, the slot conductors 225 passing through the multiple slots 224 and the connecting wire conductors 41 provided in the connecting wire sections 4 are constructed from separate conductors, and the slot conductors 225 and connecting wire conductors 41 are electrically connected at the end face side in the axial direction of the motor 2. In the electrically and mechanically integrated motor unit 1 of embodiment 1, multiple plate-shaped connecting wire conductors 41 are stacked in the axial direction, thereby reducing the axial height of the connecting wire sections 4 and, ultimately, the axial height of the motor 2, thereby making it possible to reduce the size of the electrically and mechanically integrated motor unit 1.

(Embodiment 2)
A second embodiment of the mechanically and electrically integrated motor unit according to the present invention will be described below. Descriptions of parts similar to those of the first embodiment will be omitted where appropriate. In the second embodiment, the crossover section is formed by stacking, in the axial direction, a plurality of thin ring-shaped substrates, on which a plurality of crossover conductors are arranged in the circumferential direction.

Figure 10 is a partial perspective view of the mechanically and electrically integrated motor unit 1 according to embodiment 2, cut in the axial direction. Figure 11 is a partial cross-section of the mechanically and electrically integrated motor unit 1 according to embodiment 2, cut in the axial direction.

In the electrically and mechanically integrated motor unit 1 according to the second embodiment, the crossover section 4 is formed by stacking eight substrates 42, each having a crossover conductor 41 arranged thereon, in the axial direction on the end face of the stator core 221 in the axial direction. The number of substrates 42 to be stacked is not limited to eight, as shown in Figures 10 and 11 . The crossover conductors 41 are electrically connected to the protruding portions of the slot conductors 225 that protrude from the slots 224 in the axial direction, so as to connect any two slot conductors 225 on the same substrate 42. In the electrically and mechanically integrated motor unit 1 according to the second embodiment, the crossover conductors 41 are arranged on the substrate 42, but they may also be printed circuit boards in which a conductor is bonded to prepreg, thick copper boards, or the like.

The slot conductors 225 and the crossover conductors 41 are joined by first placing the slot conductors 225 in the slots 224 of the stator 22, then covering each slot conductor 225 with a layer of integrated crossover conductors 41. After joining each corresponding slot conductor 225 and crossover conductor 41, the next layer is layered on top and joined. Methods for joining the slot conductors 225 and crossover conductors 41 include soldering, welding, fitting, and 3D printing. Furthermore, instead of layering the conductors one by one, multiple layers may be layered simultaneously. Alternatively, the crossover conductors that form the coil end portions on one axial side of the stator 22 may be integrated and then joined to the slot conductors 225. The crossover conductors 41 and slot conductors 225 may also be formed together and then attached to the stator 22.

Figure 12 is an explanatory diagram of an example of an insulator provided on the substrate 42 and slot conductor 225 of the crossover section 4.

In the electrically and mechanically integrated motor unit 1 according to the second embodiment, where the crossover conductors 41 of different potentials overlap in the axial direction at the crossover section 4, crossover conductors 41 of different potentials may be in close proximity. For this reason, as shown in FIG. 12 , for example, it is preferable to provide an insulating layer 43 made of an insulator on the back surface of the substrate 42 (the surface facing the stator core 221 in the axial direction). Furthermore, it is preferable to cover the conductor portions of the slot conductors 225 that are not electrically connected to the crossover conductors 41 with an insulating coating 226 made of an insulator. This improves the insulation between the slot conductors 225 and the crossover conductors 41, and between adjacent slot conductors 225.

As shown in FIG. 12 , the slot conductor 225 has a conductor portion 225a that protrudes axially from within the slot 224 of the slot conductor 225, and the axial end of the conductor portion 225a is electrically connected to the crossover conductor 41. The portion of the conductor portion 225a that is not electrically connected to the crossover conductor 41 is preferably covered with an insulating coating 226 made of an insulator. The conductor portion 225b located within the slot 224 of the slot conductor 225 is also preferably covered with the insulating coating 226. This improves the insulation between the crossover conductor 41 that is not electrically connected to the slot conductor 225 and between adjacent slot conductors 225. The conductor portion of the slot conductor 225 that is not electrically connected to the crossover conductor 41 may be covered with an insulator later.

Figure 13 is an explanatory diagram of an example of the shape of the slot conductor 225.

In the electrically and mechanically integrated motor unit 1 according to the second embodiment, the shape of the slot conductor 225 is preferably such that the conductor portion 225a protruding axially from the slot 224 of the slot conductor 225 has a cross-sectional shape that is nearly circular in a direction perpendicular to the axial direction, as shown in FIG. 13, and the conductor portion 225b located within the slot 224 has a cross-sectional shape that is nearly square in a direction perpendicular to the axial direction, as shown in FIG. 13. This allows the cross-section of the conductor portion 225a to conform to the shape of the circular hole 42a, and the cross-section of the conductor portion 225b to conform to the shape of the slot 224, thereby improving the ease of installation of the slot conductor 225 in the slot 224 and the connection between the slot conductor 225 and the crossover conductor 41.

In the electrically and mechanically integrated motor unit 1 of embodiment 2, the slot conductors 225 and the connecting wire conductors 41 are constructed from separate conductors, and multiple thin ring-shaped substrates 42, each with a circumferential arrangement of connecting wire conductors 41, are stacked in the axial direction, electrically connecting the slot conductors 225 and the connecting wire conductors 41 at the end faces in the axial direction of the motor 2. As a result, in the electrically and mechanically integrated motor unit 1 of embodiment 2, the axial height of the connecting wire portions 4 as the coil end portions of the stator 22, and therefore the axial height of the motor 2, can be reduced, making it possible to miniaturize the electrically and mechanically integrated motor unit 1.

In the electromechanical integrated motor unit 1 according to embodiment 2, the windings of the stator 22 are composed of slot conductors 225 and crossover conductors 41. By concentrically winding the windings of the stator 22, it is possible to increase the conductor density without intersecting the portions of the crossover conductors 41 extending from the teeth 223 side and the portions of the crossover conductors 41 extending from the back yoke 222 side within the same substrate 42 (within the same layer). This also makes it possible to reduce the number of layers (substrates 42) to be stacked, thereby enabling the crossover portions 4 serving as the coil end portions of the stator 22 to be made smaller.

Figure 14 shows an example of three-phase conductor patterns 410U, 410V, and 410W formed on the same substrate 42.

In the electrically and mechanically integrated motor unit 1 according to the second embodiment, the windings of the stator 22 are constructed using slot conductors 225 and connecting conductors 41. This makes it possible, for example, as shown in FIG. 14, to arrange the conductor patterns 410U, 410V, and 410W of each phase circumferentially at an insulation distance L2 so that the conductor patterns of different phases are not in close proximity to each other. As a result, in the electrically and mechanically integrated motor unit 1 according to the second embodiment, the insulation distance L2 is maintained within the same substrate 42, while the arrangement density of the multiple connecting conductors 41 that make up the conductor patterns 410U, 410V, and 410W of each phase within the same substrate 42 can be increased. This makes it possible to reduce the number of layers (substrates 42) stacked in the connecting portion 4, thereby enabling the connecting portion 4 to be made more compact.

Figure 15 is an explanatory diagram of the case where a fan-shaped substrate with a conductor pattern formed at the crossover section 4 is used.

In the electromechanical integrated motor unit 1 according to the second embodiment, as shown in FIG. 15 , the substrate of the crossover section 4 may be divided into sector-shaped substrates 42U, 42V, and 42W corresponding to the three-phase conductor patterns 410U, 410V, and 410W of the U, V, and W phases, respectively, and the sector-shaped substrates 42U, 42V, and 42W may be arranged adjacent to each other in the circumferential direction to form a circular ring shape (semicircular ring shape in FIG. 15 ). In this case, it is preferable that the conductor patterns 410U, 410V, and 410W formed on the sector-shaped substrates 42U, 42V, and 42W have the same crossover conductor 41 arrangement regardless of the phase. This allows the sector-shaped substrates 42U, 42V, and 42W on which the three-phase conductor patterns 410U, 410V, and 410W are formed to share the same sector-shaped substrates on which the same conductor patterns 410 are formed, thereby reducing manufacturing costs.

Furthermore, in the electromechanical integrated motor unit 1 according to embodiment 2, by arranging an insulator (e.g., an insulating layer 43 provided on the back surface of the substrate 42) above the connection between the slot conductor 225 and the connecting wire conductor 41, it is possible to arrange the connecting wire conductor 41 directly above the tooth 223 and slot 224 in the axial direction, as shown in FIG. 16 . This allows the space directly above the tooth 223 and slot 224 to be used as a connection area between the slot conductor 225 and the connecting wire conductor 41, thereby increasing the arrangement density of multiple connecting wire conductors 41 arranged on the same substrate 42 and reducing the number of layers (substrates 42) stacked in the connecting wire section 4, thereby enabling the connecting wire section 4 to be made more compact.

1 Mechanically and electrically integrated motor unit 2 Motor 3 Inverter 4 Crossover portion 5 Power supply 21 Rotor shaft 22 Stator 30A First system inverter 30B Second system inverter 30C Third system inverter 30D Fourth system inverter 31 Inverter board 31a Inner edge portion 31b Outer edge portion 32 Semiconductor element 40A First system winding 40B Second system winding 40C Third system winding 40D Fourth system winding 41 Crossover conductor 42 Board 42U, 42V, 42W Sector-shaped board 42a Circular hole 43 Insulating layer 60 Insulating material 61 Insulating sheet 221 Stator core 222 Back yoke 223 Teeth 224 Slot 225 Slot conductor 225a Conductor portion 225b Conductor portion 226 Insulating coating 320U, 320V, 320W Power module 410U, 410V, 410W Conductor Pattern

Claims (5)

A motor;
an inverter that drives the motor;
Equipped with
a mechanically and electrically integrated motor unit in which the motor and the inverter are adjacent to each other in an axial direction of the motor,
The motor
a stator core having an annular back yoke and a plurality of teeth protruding radially from the back yoke;
a plurality of slot conductors provided in slots between the plurality of teeth;
a plurality of crossover conductors electrically connected to portions of the slot conductors protruding from the slots in the axial direction, and electrically connecting any of the slot conductors together;
and
The integrated mechanical and electrical motor unit is characterized in that the plurality of crossover conductors are stacked in the axial direction at predetermined intervals to form gaps . A motor;
an inverter that drives the motor;
Equipped with
a mechanically and electrically integrated motor unit in which the motor and the inverter are adjacent to each other in an axial direction of the motor,
The motor
a stator core having an annular back yoke and a plurality of teeth protruding radially from the back yoke;
a plurality of slot conductors provided in slots between the plurality of teeth;
a plurality of crossover conductors electrically connected to portions of the slot conductors protruding from the slots in the axial direction, and electrically connecting any of the slot conductors together;
a plurality of substrates on which the plurality of crossover conductors are respectively arranged;
and
The integrated electromechanical motor unit is characterized in that the plurality of substrates are stacked so as to form gaps at predetermined intervals in the axial direction. 3. The integrated mechanical and electrical motor unit according to claim 1, wherein the plurality of crossover conductors are each plate-shaped, extend radially from the slot side toward the back yoke in a radial direction, and are arranged concentrically above the back yoke. 3. The mechanically and electrically integrated motor unit according to claim 2 , wherein an insulating layer is provided on the substrate. 5. The mechanically and electrically integrated motor unit according to claim 2, further comprising an insulator covering the slot conductors except for the portions electrically connected to the connecting conductors.