Electromechanical integrated motor unit

Abstract

To provide a mechanical and electrical integrated motor unit capable of downsizing.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 includes: a stator core that has an annular back yoke and multiple teeth protruding radially from the back yoke; multiple slot conductors provided in the slots between the multiple teeth; and multiple crossing conductors that are electrically connected to the part of the slot conductor that protrudes from the slot in the axial direction and electrically connect any two slot conductors. The multiple crossing conductors are stacked at predetermined intervals in the axial direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a mechanically and electrically integrated motor unit. [Background technology]

[0002] Patent Document 1 discloses an electromechanical integrated motor unit configured by arranging an inverter case closely above a motor case, and integrally combining the motor and inverter. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-166176 Summary of the Invention [Problem to be solved by the invention]

[0004] 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 the size.

[0005] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a mechanically and electrically integrated motor unit that can be made smaller. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, the electromechanical integrated motor unit of the present invention comprises a motor and an inverter that drives the motor, and is an electromechanical integrated motor unit in which the motor and the inverter are adjacent to each other in the axial direction of the motor and integrated, and 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 a predetermined interval in the axial direction.

[0007] This reduces the axial height of the motor, thereby enabling the electromechanical integrated motor unit to be made smaller.

[0008] In the above, the plurality of crossover conductors may each be plate-shaped, extend radially from the slot side toward the back yoke in a radial direction, and be arranged concentrically above the back yoke.

[0009] This allows for a higher conductor density within the same layer.

[0010] In the above, an insulator may be provided to cover the connecting conductor.

[0011] This can improve the insulation between the crossover conductors.

[0012] In the above, a plurality of substrates may be provided on which the plurality of crossover conductors are respectively arranged.

[0013] As a result, by stacking the substrates on which the crossover conductors are arranged in the axial direction, the slot conductors and the crossover conductors can be electrically connected at the end face side in the axial direction of the motor, thereby reducing the axial height of the motor and making it possible to miniaturize the electromechanical integrated motor unit.

[0014] In the above, an insulating layer may be provided on the substrate.

[0015] This can improve the insulation between the crossover conductors.

[0016] In the above, an insulator may be provided to cover the slot conductors except for the portions electrically connected to the crossover conductors.

[0017] This can improve the insulation between the slot conductor and the crossover conductor, and the insulation between adjacent slot conductors. [Effects of the Invention]

[0018] The electromechanical integrated motor unit according to the present invention has the effect of reducing the axial height of the motor and achieving miniaturization. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a mechanically and electrically integrated motor unit according to the first embodiment. [Figure 2] 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. [Figure 3] FIG. 3 is a diagram showing a connection portion between a slot conductor and a crossover conductor. [Figure 4] FIG. 4 is a diagram showing an example of wiring of a crossover conductor. [Figure 5] FIG. 5 is a diagram showing a case where four systems of stator windings are provided in parallel to multiplex the inverter. [Figure 6] 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. [Figure 7] FIG. 7 is an explanatory diagram of the mounting area of ​​the inverter. [Figure 8] FIG. 8 is a diagram showing another example of the wiring of the crossover conductor. [Figure 9] FIG. 9 is a partial cross-sectional view of the mechanically and electrically integrated motor unit according to the first embodiment cut in the axial direction. [Figure 10] 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. [Figure 11] FIG. 11 is a partial cross section of the mechanically and electrically integrated motor unit according to the second embodiment taken along the axial direction. [Figure 12] FIG. 12 is an explanatory diagram of an example of an insulator provided on the substrate and slot conductor of the crossover portion. [Figure 13] FIG. 13 is an explanatory diagram showing an example of the shape of the slot conductor. [Figure 14] FIG. 14 is a diagram showing an example of a three-phase conductor pattern formed on the same substrate. [Figure 15] FIG. 15 is a diagram showing an example of an inverter configured using a sector-shaped substrate on which a conductor pattern is formed. [Figure 16] 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. DETAILED DESCRIPTION OF THE INVENTION

[0020] (Embodiment 1) A first embodiment of the mechanically and electrically integrated motor unit according to the present invention will be described below, although the present invention is not limited to this embodiment.

[0021] FIG. 1 is a diagram showing a schematic configuration of a mechanically and electrically integrated motor unit 1 according to the first embodiment.

[0022] As shown in FIG. 1 , the electromechanical integrated motor unit 1 according to the embodiment is composed of a motor 2 and an inverter 3. The electromechanical integrated motor unit 1 is mounted on, for example, an electric vehicle. The motor 2 is a rotating electric machine composed of a rotor provided with a rotor shaft 21, a stator, and the like, and is driven by power supplied from a power source (not shown) via an inverter 3. The electromechanical integrated motor unit 1 according to the first embodiment is a drive unit (electromechanical integrated device) in which the motor 2 and the inverter 3 are stacked and integrated in the axial direction of the rotor shaft 21 of the motor 2 via crossover wire portions 4 serving as coil end portions of the stator 22 of the motor 2 in the axial direction. Note that, in the electromechanical integrated motor unit 1 according to the first embodiment, a case will be described in which 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.

[0023] 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 in FIG. 2, the rotor that constitutes the motor 2 is not shown.

[0024] 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 one slot 224.

[0025] Fig. 3 is a diagram showing a connection portion between the slot conductor 225 and the crossover conductor 41. Fig. 4 is a diagram showing an example of wiring of the crossover conductor 41.

[0026] The crossover 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 crossover portion 4 is provided on an end face of the stator core 221 in the axial direction, and a plurality of crossover conductors 41 for electrically connecting any two slot conductors 225 are provided on the end face side of the back yoke 222 in the axial direction. Each of the plurality of crossover conductors 41 is made of a plate-shaped thick copper conductor. Furthermore, the plurality of 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.

[0027] 3, the crossover conductor 41 is electrically connected to a protruding portion that protrudes from inside the slot 224 in the axial direction of the slot conductor 225. Note that, 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.

[0028] 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 formed by the slot conductors 225 and the crossover conductors 41, to cause current to flow, thereby generating a magnetic field for applying a driving force to the rotor of the motor 2.

[0029] As shown in FIG. 2 , the inverter 3 is configured by an inverter board 31, a plurality of semiconductor elements 32 and a wiring pattern (not shown) provided on the inverter board 31, and the like. The inverter 3 is electrically connected to a battery (not shown) and the slot conductors 225 of the motor 2, and controls the driving of the motor 2 by controlling the power supplied from the battery to the motor 2. The semiconductor elements 32 and wiring pattern that configure the inverter 3 are not limited to being provided 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 on which discrete power elements are mounted, or a switching module in which power elements are integrated into a case.

[0030] In the electromechanical integrated motor unit 1 of embodiment 1, a multiplexed structure is adopted in which inverters 3 are placed on both axial end faces of the motor 2, and by multiplexing the systems, redundancy can be ensured.

[0031] FIG. 5 is a diagram showing a case where four systems of windings of the stator 22 are provided in parallel to multiplex the inverter 3.

[0032] 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 system winding 40A, a second system winding 40B, a third system winding 40C, and a fourth system winding 40D. The windings (conductors) of the stator 22 are connected in a closed winding configuration in which each system is star-connected. Note that the windings of the stator 22 may be connected as open windings without a neutral point, thereby improving redundancy. The four winding systems, i.e., the first system winding 40A, the second system winding 40B, the third system winding 40C, and the fourth system winding 40D, are connected to four corresponding first system inverters 30A, 30B, 30C, and 30D. The four systems, the first system inverter 30A, the second system inverter 30B, the third system inverter 30C, and the fourth system inverter 30D, are connected in series to each other and are supplied with DC power from a power supply 5 connected to the first inverter system 4A. The DC power supplied to the first system inverter 30A, the second system inverter 30B, the third system inverter 30C, and the fourth system inverter 30D is converted into AC power according to each system and supplied to the first system winding 40A, the second system winding 40B, the third system winding 40C, and the fourth system winding 40D.

[0033] Note that, although an example in which the windings of stator 22 are connected in four parallel configurations (four parallel configurations) is shown here, the present invention is not limited to a four-parallel configuration (four parallel configurations). In other words, redundancy can be improved by providing two or more systems of electrically independent windings of stator 22 and connecting the windings of stator 22 in two or more parallel configurations (two or more parallel configurations).

[0034] FIG. 6 is a diagram showing an example of an inverter 3 in which an inverter board 31 is divided into two equal parts in the circumferential direction and multiplexed.

[0035] 6, in the electromechanical integrated motor unit 1 according to the first embodiment, two sets of three-phase power modules 320U, 320V, 320W, each consisting of a U-phase, a V-phase, and a W-phase, are provided on inverter boards 31 provided on both ends in the axial direction of the motor 2. Each of the three-phase power modules 320U, 320V, 320W is configured by four semiconductor elements 32 and the like.

[0036] 6, in the electromechanical integrated motor unit 1 according to the first embodiment, the inverter board 31 on one side in the axial direction of the motor 2 is divided into two equal parts in the circumferential direction, and a first set of three-phase power modules 320U, 320V, and 320W is arranged on one side to form the first-system inverter 30A, and a second set of three-phase power modules 320U, 320V, and 320W is arranged on the other side to form the second-system inverter 30B. Similarly, although not shown, the inverter board 31 on the remaining side in the axial direction of the motor 2 is divided into two equal parts in the circumferential direction, and a first set of three-phase power modules 320U, 320V, and 320W is arranged on one side to form the third-system inverter 30C, and a second set of three-phase power modules 320U, 320V, and 320W is 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 by the first system inverter 30A to the fourth system inverter 30D, it is possible to improve redundancy. Note that the number of systems of the inverter 3 provided on one side in the axial direction of the motor 2 is not limited to two systems, and redundancy can be improved by using 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.

[0037] FIG. 7 is an explanatory diagram of the mounting area of ​​the inverter 3. As shown in FIG.

[0038] 7, in the electromechanical integrated motor unit 1 according to the first embodiment, the size of the inverter board 31 in the radial direction may be such that the inner edge 31a and the outer edge 31b of the inverter board 31 protrude beyond the inner and outer diameters of the stator core 221. This allows for a larger mounting area for mounting semiconductor elements 32 and the like on the inverter board 31 than when the inner edge 31a and the outer edge 31b of the inverter board 31 do not protrude beyond the inner and outer diameters of the stator core 221. This allows for a smaller volume of the inverter 3 in the axial direction, enabling the electromechanical integrated motor unit 1 to be miniaturized while maintaining redundancy.

[0039] In the electromechanical 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 crossover conductors 41, and the slot conductors 225 and the crossover conductors 41 are formed from different conductors, so that each conductor can have an appropriate cross-sectional shape depending on where it is placed. As an example, the slot conductors 225 have a conductor cross-sectional shape that is close to square so as to fit the shape of the slots 224, and the crossover conductors 41 are arranged as plate-shaped conductors so as to reduce the axial height of the crossover portions 4, thereby making it possible to reduce the size of the electromechanical integrated motor unit 1.

[0040] Furthermore, in the electrically-mechanical integrated motor unit 1 according to the first embodiment, the inverter 3 can be disposed not only above the back yoke 222 in the axial direction but also above the slot 224, so that it is possible to provide an electrically-mechanical integrated motor unit 1 in which the inverter 3 is disposed on the end side in the axial direction of the motor 2 while suppressing an increase in the axial dimension. Furthermore, in the electrically-mechanical integrated motor unit 1 according to the first embodiment, the wiring connecting the motor 2 and the inverter 3 can be shortened, which makes it possible to reduce power loss.

[0041] Here, the slot conductors 225 extending from the slots 224 in the axial direction and the crossover conductors 41 extending radially from the back yoke 222 are electrically connected at their intersections by soldering, laser welding, fit-and-joint, or the like. In this case, if the connection portions of the slot conductors 225 and the crossover conductors 41 are adjacent to each other in the same plane (in the same layer), the insulation distance between the adjacent connection portions becomes short, which may cause a short circuit between the slot conductors 225. In order to prevent such a short circuit between adjacent connection portions, for example, as shown in FIG. 8 , by widening the distance between the connection portions of the slot conductors 225 and the crossover conductors 41 in the same plane (in the same layer) so that the insulation distance L1 is obtained, it becomes possible to connect the slot conductors 225 and the crossover conductors 41 while ensuring insulation, thereby improving insulation.

[0042] 9 is a partial cross-sectional view taken along the axial direction of the mechanically and electrically integrated motor unit 1 according to embodiment 1. Reference numeral 61 in FIG. 9 denotes an insulating sheet interposed between the inverter board 31 of the inverter 3 and the insulating material 60 of the connecting wire portion 4.

[0043] At the locations where the connecting conductors 41 in the connecting section 4 overlap in the axial direction, the connecting conductors 41 of different potentials may be close to each other. For this reason, it is preferable to mold each of the connecting conductors 41 by covering (wrapping) it with an insulating material 60, which is an insulator, as shown in Fig. 9, for example. This improves the insulation between the connecting conductors 41.

[0044] In the electrically and mechanically integrated motor unit 1 according to the first embodiment, the slot conductors 225 passing through the plurality of slots 224 and the crossover conductors 41 provided in the crossover sections 4 are constructed from separate conductors, and the slot conductors 225 and the crossover conductors 41 are electrically connected to each other on the end face side in the axial direction of the motor 2. In the electrically and mechanically integrated motor unit 1 according to the first embodiment, the plurality of plate-shaped crossover conductors 41 are stacked in the axial direction, thereby reducing the axial height of the crossover sections 4 and, ultimately, the axial height of the motor 2, and thereby making it possible to reduce the size of the electrically and mechanically integrated motor unit 1.

[0045] (Embodiment 2) A second embodiment of the mechanically and electrically integrated motor unit according to the present invention will be described below. Note that in this embodiment, descriptions of parts that are the same as those in the first embodiment will be omitted as 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.

[0046] Fig. 10 is a partial perspective view of the mechanically and electrically integrated motor unit 1 according to embodiment 2 cut in the axial direction. Fig. 11 is a partial cross-sectional view of the mechanically and electrically integrated motor unit 1 according to embodiment 2 cut in the axial direction.

[0047] In the electrically and mechanically integrated motor unit 1 according to the second embodiment, the crossover section 4 is configured by stacking eight substrates 42, each having a crossover conductor 41 disposed thereon, in the axial direction on an 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, for example, Figures 10 and 11. The crossover conductor 41 is electrically connected to the protruding portion of the slot conductor 225 that protrudes from the slot 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 conductor 41 is disposed on the substrate 42, but a printed circuit board in which a conductor is bonded to a prepreg, a thick copper board, or the like may also be used.

[0048] 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 the corresponding slot conductors 225 and crossover conductors 41, the next layer is stacked on top of the first and joined. Methods for joining the slot conductors 225 and crossover conductors 41 include soldering, welding, fitting, and 3D printing. Instead of stacking the conductors layer by layer, multiple layers may be stacked simultaneously. Alternatively, the crossover conductors that form the coil end portions on one side of the axial direction of the stator 22 may be integrated and then joined to the slot conductors 225. Alternatively, the crossover conductors 41 and the slot conductors 225 may be formed together and then attached to the stator 22.

[0049] FIG. 12 is an explanatory diagram of an example of an insulator provided on the substrate 42 of the crossover portion 4 and the slot conductor 225. In FIG.

[0050] In the electrically and mechanically integrated motor unit 1 according to the second embodiment, at the locations where the crossover conductors 41 overlap in the axial direction in the crossover section 4, the crossover conductors 41 of different potentials may be close to each other. For this reason, for example, as shown in FIG. 12 , it is preferable to provide an insulating layer 43 made of an insulator on the back surface of the substrate 42 (the surface on the stator core 221 side in the axial direction). It is also 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 can improve the insulation between the slot conductors 225 and the crossover conductors 41 and between adjacent slot conductors 225.

[0051] As shown in Fig. 12, in the slot conductor 225, of the conductor portion 225a that protrudes axially from the inside of the slot 224 in the slot conductor 225, the axial end portion 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. In addition, it is also preferable to cover the conductor portion 225b located in the slot 224 of the slot conductor 225 with the insulating coating 226. This can improve insulation between the crossover conductor 41 that is not electrically connected to the slot conductor 225 and between adjacent slot conductors 225. Note that an insulator may be later applied to the conductor portion of the slot conductor 225 that is not electrically connected to the crossover conductor 41.

[0052] FIG. 13 is an explanatory diagram showing an example of the shape of the slot conductor 225. As shown in FIG.

[0053] In the electro-mechanical 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 from the slot 224 of the slot conductor 225 in the axial direction 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. In this way, by making the cross-section of the conductor portion 225a conform to the shape of the circular hole 42a and making the cross-section of the conductor portion 225b conform to the shape of the slot 224, it is possible to improve the installation property of the slot conductor 225 in the slot 224 and the connection property between the slot conductor 225 and the crossover conductor 41.

[0054] In the electrically and mechanically integrated motor unit 1 according to the second embodiment, the slot conductors 225 and the connecting wire conductors 41 are formed from separate conductors, and a plurality of thin ring-shaped substrates 42, each having a plurality of connecting wire conductors 41 arranged circumferentially, are stacked in the axial direction, thereby electrically connecting the slot conductors 225 and the connecting wire conductors 41 at the end face sides in the axial direction of the motor 2. As a result, in the electrically and mechanically integrated motor unit 1 according to the second embodiment, the axial height of the connecting wire portions 4 serving as coil end portions of the stator 22, and therefore the axial height of the motor 2, can be reduced, making it possible to make the electrically and mechanically integrated motor unit 1 more compact.

[0055] In the electromechanical integrated motor unit 1 according to the second embodiment, the windings of the stator 22 are composed of slot conductors 225 and crossover conductors 41, and the winding configuration of the stator 22 is concentric, which makes it possible to increase the conductor density without intersecting the portion of the crossover conductor 41 extending from the tooth 223 side and the portion of the crossover conductor 41 extending from the back yoke 222 side within the same substrate 42 (within the same layer).In addition, it is possible to reduce the number of layers (substrates 42) to be stacked, and the crossover portions 4 serving as coil end portions of the stator 22 can be made smaller.

[0056] FIG. 14 is a diagram showing an example of three-phase conductor patterns 410U, 410V, and 410W formed on the same substrate .

[0057] In the electrically and mechanically integrated motor unit 1 according to the second embodiment, the windings of the stator 22 are formed from slot conductors 225 and crossover conductors 41, and thereby, for example, as shown in Fig. 14, it is possible to arrange the conductor patterns 410U, 410V, 410W of each phase at an insulation distance L2 in the circumferential direction so that the conductor patterns of different phases are not close to each other. As a result, in the electrically and mechanically integrated motor unit 1 according to the second embodiment, it is possible to increase the arrangement density of the multiple crossover conductors 41 that make up the conductor patterns 410U, 410V, 410W of each phase on the same substrate 42 while ensuring the insulation distance L2 on the same substrate 42, and it is possible to reduce the number of layers (substrates 42) to be stacked in the crossover section 4, thereby enabling the crossover section 4 to be made smaller.

[0058] FIG. 15 is an explanatory diagram of a case where a sector-shaped substrate on which a conductor pattern is formed at a crossover portion 4 is used.

[0059] In the electromechanically 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 arrangement of the crossover conductors 41 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 respectively formed to share the same sector-shaped substrates on which the same conductor patterns 410 are formed, thereby reducing manufacturing costs.

[0060] Furthermore, in the electromechanical integrated motor unit 1 according to the second embodiment, by arranging an insulator (for example, an insulating layer 43 provided on the back surface of the substrate 42) above the connection portion between the slot conductor 225 and the connecting wire conductor 41, it becomes possible to arrange the connecting wire conductor 41 directly above the tooth 223 and the slot 224 in the axial direction, as shown in Fig. 16. This allows the space directly above the tooth 223 and the slot 224 to be used as a connection region between the slot conductor 225 and the connecting wire conductor 41, so that the arrangement density of multiple connecting wire conductors 41 arranged on the same substrate 42 can be increased, and the number of layers (substrates 42) stacked in the connecting wire section 4 can be reduced, thereby enabling the connecting wire section 4 to be made more compact. [Explanation of symbols]

[0061] 1. Electromechanical integrated motor unit 2 motors 3 inverters 4 Crossing section 5 Power supply 21 Rotor shaft 22 Stator 30A 1st system inverter 30B Second system inverter 30C 3rd system inverter 30D 4th system inverter 31 Inverter board 31a Inner edge 31b outer edge 32 Semiconductor elements 40A Primary Winding 40B Secondary winding 40C 3rd system winding 40D Fourth system winding 41 Crossover conductor 42 PCB 42U, 42V, 42W fan-shaped board 42a Circular hole 43 Insulating layer 60 Insulation 61 Insulation sheet 221 Stator Core 222 Back Yoke 223 Teeth 224 Slots 225 Slotted Conductor 225a Conductor part 225b Conductor part 226 Insulating coating 320U, 320V, 320W power module 410U, 410V, 410W conductor pattern

Claims

1. 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.

2. 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. 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.

4. 3. The mechanically and electrically integrated motor unit according to claim 2, wherein an insulating layer is provided on the substrate.

5. 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.

Images