Mechanical-electrical integrated rotary electric machine device

Abstract

This mechanical-electrical integrated rotary electric machine device is provided with: a rotary electric machine; a power conversion device; a housing that houses the rotary electric machine and the power conversion device; a bus bar module that electrically connects a plurality of first connection parts of the power conversion device and a plurality of second connection parts of the rotary electric machine; an opening part that is provided to be a wall part of the housing and that faces the plurality of second connection parts; and a cover that covers the opening part. The bus module has: a plurality of bus bars having a first bus bar connection part connected to the first connection part; an extension part extending from the first bus bar connection part to the second connection part, and a second bus bar connection part bent from the extension part and connected to the second connection part; and an electrically insulating bus bar holder covering the extension parts of the plurality of bus bars arranged so that the second bus bar connection parts are separated from each other. The cover has: an opening closing part that closes the opening; and an electrically insulating partition wall part that protrudes from the opening closing part toward the plurality of second connection parts to which the second bus bar connection part is connected, and is inserted between the second bus bar connection parts that are adjacent to each other.

Description

Integrated mechanical and electrical rotating electrical equipment

[0001] The present invention relates to a mechanically and electrically integrated rotating electric machine device.

[0002] A conventional mechanically and electrically integrated rotating electric machine device has been known in which a motor, which is a rotating electric machine, and an inverter, which is a power conversion device, are housed integrally in a housing. A plurality of bus bars connecting the motor and the inverter are overmolded with insulating resin or the like to ensure insulation from surrounding members and interphase insulation.

[0003] On the other hand, Patent Document 1 describes a configuration that does not use such overmolding. In the technology described in Patent Document 1, bus bars connected to terminals extending from a power module are placed on a tray provided with an insulating sheet. Connection holes are formed at the other ends of the linearly extending bus bars, and terminal members on the motor side are inserted into the holes from below to connect.

[0004] Japanese Patent No. 6409968

[0005] In the technology described in Patent Document 1, the bus bar is arranged on a tray that is horizontal to the motor housing, and the motor-side connection part is configured to extend up to the position of the bus bar. Therefore, it is necessary to be able to pull out the motor-side connection part up to the position of the tray.

[0006] However, the placement of the power module, which requires a cooling mechanism, depends on the configuration of the power conversion device, and the connection terminals of the power module cannot always be placed near the motor-side connection. In such cases, it is necessary to route the bus bar from the power module connection terminal to the area where the motor-side connection is located, and then bend the bus bar connection area to bring it close to the motor-side connection. Therefore, in configurations that do not use overmolding, ensuring insulation in the bus bar routing area and the motor connection area becomes an issue.

[0007] A mechanically and electrically integrated rotating electric machine device according to an aspect of the present invention includes a rotating electric machine, a power conversion device connected to the rotating electric machine, a housing that accommodates the rotating electric machine and the power conversion device, a bus bar module that electrically connects a plurality of first connection portions of the power conversion device and a plurality of second connection portions of the rotating electric machine, an opening that is provided in a wall of the housing and faces the plurality of second connection portions, and a cover that covers the opening, wherein the bus bar module includes first bus bar connection portions that are connected to the first connection portions, and a cover that covers the first bus bar connection portions that are connected to the second connection portions. the cover has a plurality of bus bars each having an extension portion extending to a connection portion and a second bus bar connection portion bent from the extension portion to connect to the second connection portion, and an electrically insulating bus bar holder that covers the extension portions of the plurality of bus bars arranged so that the second bus bar connection portions are spaced apart, and the cover has an opening closing portion that closes the opening, and an electrically insulating partition portion that protrudes from the opening closing portion toward the plurality of second connection portions to which the second bus bar connection portions are connected and is inserted between adjacent second bus bar connection portions.

[0008] According to the present invention, in a configuration that does not use overmolding, insulation can be ensured in the bus bar routing area and the motor connection area.

[0009] FIG. 1 is a perspective view showing the appearance of a mechanically and electrically integrated rotating electric machine device according to the present invention. FIG. 2 is a diagram showing a schematic configuration of a power conversion device. FIG. 3 is a diagram showing a portion of the component arrangement within an inverter housing. FIG. 4 is a perspective view showing the appearance of a busbar module. FIG. 5 is another perspective view showing the appearance of the busbar module. FIG. 6 is a diagram showing the shape of busbars for three phases. FIG. 7 is a diagram showing the busbar side surface of one holder member. FIG. 8 is a diagram showing the busbar side surface of the other holder member. FIG. 9 is a diagram showing the A1-A1 cross section of FIG. 5. FIG. 10 is a diagram explaining a snap-fit ​​mechanism. FIG. 11 is an enlarged view of the inverter housing area where the second busbar connection portion is arranged. FIG. 12 is a perspective view showing the appearance of a terminal cover.

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The following description and drawings are examples for explaining the present invention, and appropriate omissions and simplifications have been made for clarity of explanation. Furthermore, in the following description, identical or similar elements and processes are given the same reference numerals, and duplicate explanations may be omitted. Note that the content described below merely shows an example of an embodiment of the present invention, and the present invention is not limited to the following embodiment, and can be implemented in various other forms.

[0011] FIG. 1 is a perspective view showing the exterior of a mechanically and electrically integrated rotating electric machine device 1 according to the present invention. The mechanically and electrically integrated rotating electric machine device 1 is configured by integrating a rotating electric machine 10 and a power conversion device 20. The mechanically and electrically integrated rotating electric machine device 1 is used, for example, as a drive device for an electric vehicle. The rotating electric machine 10, such as a motor, has a substantially cylindrical housing (hereinafter referred to as a motor housing) 10a that houses a rotor and a stator. Note that the portion below the portion marked with reference numeral 10a is shown as a large cylinder and a small cylinder, with detailed shapes omitted. A substantially rectangular parallelepiped housing (hereinafter referred to as an inverter housing) 20a that houses electrical components constituting a power conversion device 20 is fixed to the upper portion of the motor housing 10a with bolts or the like. An upper cover 20b that covers the upper portion of the inverter housing 20a is provided.

[0012] 2 is a diagram showing a schematic configuration of the power conversion device 20. The power conversion device 20 converts DC power supplied from a DC power source 2 into AC power to drive the rotating electric machine 10. The power conversion device 20 includes a power conversion circuit 200, a gate drive circuit 201, a control circuit 202, and a smoothing capacitor 203. The power conversion circuit 200 includes U-phase, V-phase, and W-phase power modules 210U, 210V, and 210W.

[0013] Each power module 210U, 210V, 210W includes two sets of power semiconductors 211 that form an upper arm and a lower arm. Each power module 210U, 210V, 210W includes three terminals (connection P terminals 212U, 212V, 212W, connection N terminals 213U, 213V, 213W, and connection AC terminals 214U, 214V, 214W). The connection P terminals 212U, 212V, 212W are connected to a positive bus line 204p, and the connection N terminals 213U, 213V, 213W are connected to a negative bus line 204n. The connection AC terminals 214U, 214V, 214W are connected to motor-side connectors 10U, 10V, 10W, which are connected to windings of the corresponding phases of the rotating electric machine 10, via bus bars 300U, 300V, 300W, which will be described later.

[0014] Each power semiconductor 211 switches on / off in response to a drive signal input from the gate drive circuit 201, and converts DC power to AC power. The control circuit 202 inputs an on / off command for each power semiconductor 211 to the gate drive circuit 201 based on a command from a higher-level controller (not shown) provided on the vehicle side.

[0015] For example, a power metal oxide semiconductor field effect transistor (MOSFET) or an insulated gate bipolar transistor (IGBT) is used as the power semiconductor 211. In the example shown in FIG.

[0016] Both ends of the smoothing capacitor 203 are connected to the positive bus line 204p and the negative bus line 204n. The smoothing capacitor 203 is a capacitor that smoothes the current generated by turning on / off the power semiconductor 211 and suppresses ripples in the DC current supplied from the DC power supply 2 to the power conversion circuit 200. For example, an electrolytic capacitor or a film capacitor is used as the smoothing capacitor 203.

[0017] FIG. 3 is a diagram showing a portion of the component layout within the inverter housing 20a. FIG. 3 illustrates a portion of the power conversion device 20 with the top cover 20b covering the top of the inverter housing 20a removed. A module housing section 206 housing the power modules 210U to 210W is provided below the circuit board 215 on which the gate drive circuit 201 and other components are mounted. While the power module 210W is not shown in FIG. 3, it is located above the power module 210V in the figure. A refrigerant flow path (not shown) is formed in the module housing section 206, and the power modules 210U to 210W are disposed in the refrigerant flow path. The power modules 210U to 210W are cooled by the refrigerant flowing through the refrigerant flow path. A supply port 207a for supplying refrigerant and a discharge port 207b (see FIG. 1) for discharging the refrigerant are provided on the side wall of the inverter housing 20a.

[0018] The inverter housing 20a is provided with a DC connector 205 connected to an external DC power supply 2. A positive bus line 204p is connected to a positive terminal 205p of the DC connector 205, and a negative bus line 204n is connected to a negative terminal 205n of the DC connector 205. As described above, the connection P terminals 212U to 212W of the power modules 210U to 210W are connected to the positive bus line 204p, and the connection N terminals 213U, 213V, and 213W are connected to the negative bus line 204n.

[0019] A bus bar module 30 (see FIG. 4 ), which will be described later, is disposed below the module accommodating section 206. As will be described in detail later, the bus bar module 30 includes bus bars 300U, 300V, and 300W and a bus bar holder 310. Each bus bar 300U, 300V, and 300W includes first bus bar connection portions 301U, 301V, and 301W that are connected to the AC connection terminals 214U, 214V, and 214W of the power modules 210U to 210W, and second bus bar connection portions 302U, 302V, and 302W that are connected to the motor-side connection portions 10U, 10V, and 10W of the U, V, and W phases on the rotating electric machine 10 side. The first bus bar connection portions 301U and 301V and the second bus bar connection portions 302U, 302V, and 302W are illustrated in FIG. 3 .

[0020] Although not shown, motor-side connection portions 10U, 10V, and 10W extend from motor housing 10a to region R1 within inverter housing 20a. Therefore, second bus bar connection portions 302U, 302V, and 302W of bus bars 300U, 300V, and 300W are also arranged in region R1. An opening 208 is formed in the side wall of inverter housing 20a in a side wall region facing second bus bar connection portions 302U, 302V, and 302W. A terminal cover 209 is fixed to opening 208 with bolts or the like, and opening region 208 is covered by terminal cover 209.

[0021] 4 and 5 are perspective views showing the appearance of the busbar module 30. FIG. 4 illustrates the busbar module 30 in the same arrangement as that in FIG. 3 (with the z-axis pointing upward in the figure). Meanwhile, FIG. 5 illustrates a perspective view of the busbar module 30 when the coordinate axes are set so that the z-axis points downward, i.e., when viewed from the bottom side of the inverter housing 20a. The busbar module 30 includes three busbars 300U, 300V, and 300W corresponding to the U, V, and W phases, respectively, and a busbar holder 310. The busbar module 30 is fixed to the lower part (rear side) of the module accommodating section 206 shown in FIG. 3 with bolts or the like using a plurality of fixing holes 316 formed in the busbar holder 310.

[0022] 6 is a diagram showing the shapes of bus bars 300U, 300V, and 300W provided in bus bar module 30. The arrangement of bus bars 300U, 300V, and 300W is shown in the same arrangement as that within bus bar module 30. Bus bars 300U, 300V, and 300W are formed from a thin, plate-shaped conductive material (for example, a metal material with excellent conductivity such as oxygen-free copper).

[0023] Bus bar 300U has an extension portion 303U that is routed in an L-shape within the xy plane, and first and second bus bar connection portions 301U and 302U that are provided at both ends of bus bar 300U and bent in the positive direction of the z-axis from extension portion 303U. Similarly, each bus bar 300V, 300W has extension portions 303V, 303W that are L-shaped within the xy plane, and first and second bus bar connection portions 301V, 301W and 302V, 302W that bent in the positive direction of the z-axis from extension portions 303V, 303W. Fastening holes 305 that are used when connecting the bus bars are formed in each of bus bar connection portions 301U to 301W and 302U to 302W.

[0024] The busbar holder 310 is formed of an electrically insulating material that covers the extension portions 303U to 303W of each busbar 300U to 300W. Resin, ceramics, or the like is used as the insulating material. As shown in FIGS. 4 and 5 , the busbar holder 310 is composed of a holder member 310a that covers the positive side of the extension portions 303U to 303W in the z direction, and a holder member 310b that covers the negative side of the extension portions 303U to 303W in the z direction. The busbar connection portions 301U to 301W and 302U to 302W of the busbars 300U to 300W are exposed from the busbar holder 310.

[0025] Fig. 7 is a diagram showing the busbar side surface of holder member 310a. Fig. 8 is a diagram showing the busbar side surface of holder member 310b. Holder members 310a and 310b each include a groove 311U in which extension portion 303U is disposed, a groove 311V in which extension portion 303V is disposed, and a groove 311W in which extension portion 303W is disposed. Partition portions 312 are formed in a region R11 between groove portions 311U and 311V of holder member 310a and in a region R12 between groove portions 311V and 311W of holder member 310a. Similarly, partition portions 313 are formed in a region R13 between groove portions 311U and 311V of holder member 310b and in a region R14 between groove portions 311V and 311W of holder member 310b.

[0026] 9 is a cross-sectional view taken along the line A1-A1 in FIG. 5. The configuration of the partitions 312, 313 will be described with reference to FIG. 9. The partition 312 formed on the holder member 310a and the partition 313 formed on the holder member 310b face each other. The pair of opposing partitions 312, 313 on the left side in the drawing are provided to fill the gap G11 between the extensions 303U and 303V. Similarly, the pair of opposing partitions 312, 313 on the right side in the drawing are provided to fill the gap G12 between the extensions 303V and 303W.

[0027] The surface of partition 312 facing partition 313 is provided with a centrally located convex surface S1 and concave surface S2 located on both sides of convex surface S1. Meanwhile, the surface of partition 313 facing partition 312 is provided with a centrally located concave surface S3 and convex surface S4 located on both sides of concave surface S3. Convex surface S1 of partition 312 fits into concave surface S3 of partition 313, and convex surface S4 of partition 313 fits into concave surface S2 of partition 312.

[0028] 9, the gaps G11, G12 between the bus bars are filled with the insulating member partitions 312, 313, ensuring interphase insulation performance. Furthermore, the contact surfaces between the partitions 312, 313 are uneven, increasing the creepage distance and improving interphase insulation.

[0029] The holder members 310a and 310b are joined together using, for example, a mechanical joining method called a snap fit, as shown in FIG. 10 . The holder member 310b has a joining claw 314 with a protrusion 314a formed thereon, and the holder member 210a has a recess 315 into which the protrusion 314a engages. When the holder member 310b is moved toward the holder member 310a as shown by the arrow, the inclined portion 314b at the tip of the joining claw 314 abuts against the upper end of the holder member 310a, causing the joining claw 314 to elastically deform as shown by the dashed line. When the holder member 310b is moved further downward, the protrusion 314a of the joining claw 314 fits into and engages with the recess 315 of the holder member 310a. As a result, the holder members 310a and 310b are joined together.

[0030] 11 is an enlarged view of the portion where the opening 208 in FIG. 3 is provided with the terminal cover 209 and the second bus bar connection portions 302U to 302W of the bus bars 300U to 300W are provided. The motor-side connection portions 10U, 10V, and 10W are also shown in FIG. The opening 208 provided in the side wall of the inverter housing 20a is an opening for connecting the second bus bar connection portions 302U to 302W of the bus bars 300U to 300W with the motor-side connection portions 10U, 10V, and 10W. A tool or the like is inserted into the inverter housing 20a through the opening 208, and the connection portions are fastened together with screws.

[0031] 12 is a perspective view showing the appearance of the terminal cover 209. The terminal cover 209 includes a closing portion 220 that covers the opening 208 provided in the side wall of the inverter housing 20a, and plate-shaped insulating wall portions 221a and 221b that are erected on the inner peripheral surface of the closing portion 220. Holes 224 are formed in the closing portion 220 for bolting the terminal cover 209 to the inverter housing 20a. The terminal cover 209 is made of an electrically insulating material (e.g., a resin material).

[0032] 11 shows a cross section of the terminal cover 209 attached to the opening 208. The gap between the closing portion 220 of the terminal cover 209 and the side wall of the inverter housing 20a is sealed with a sealant 223. A metal plate 222 is embedded in the closing portion 220 of the terminal cover 209.

[0033] Within inverter housing 20a, motor connection portions 10U to 10W are drawn out from motor housing 10a so as to face opening 208. Second bus bar connection portions 302U to 302W of bus bars 300U to 300W are bent so as to be close to motor connection portions 10U to 10W, i.e., so as to bend along the z-axis direction from extension portions 303U to 303W. Second bus bar connection portions 302U to 302W are arranged so as to overlap motor connection portions 10U to 10W of the corresponding phases in the y-direction. The screw fastening operation therefor is performed via opening 208 as described above.

[0034] Although not shown in the figure, for example, nuts are fixed in advance to the surfaces of the second bus bar connection portions 302U to 302W on the positive side in the y direction by welding or the like, and bolts are inserted through the connection holes 101 of the motor connection portions 10U to 10W and fastened to the nuts. In the example shown in Figure 11, the motor connection portions 10U to 10W and the second bus bar connection portions 302U to 302W are arranged in this order in the y direction, but they may also be arranged in the reverse order. In this case, nuts are fixed to the motor connection portions 10U to 10W.

[0035] Gaps G are provided between motor connection portion 10U and second bus bar connection portion 302U and motor connection portion 10V and second connection portion 302V, and between motor connection portion 10V and second bus bar connection portion 302V and motor connection portion 10W and second bus bar connection portion 302W. Insulating wall portions 221a and 221b of terminal cover 209 fixed to opening 208 are inserted into gaps G. Inserting insulating wall portions 221a and 221b into gaps G maintains interphase insulation performance at connections where conductors are exposed. Furthermore, metal plate 222 is embedded in blocking portion 220 covering opening 208, so that radiation noise generated by AC current is blocked by metal plate 222, thereby suppressing radiation noise from leaking to the outside from inverter housing 20a.

[0036] After the screw fastening operation between the motor connection portions 10U to 10W and the second bus bar connection portions 302U to 302W is completed, the terminal cover 209 is attached to the opening 208 and secured with bolts. When attaching the terminal cover 209 to the opening 208, first, the insulating wall portions 221a and 221b protruding into the housing from the opening 208 are inserted into the gaps G. Then, while the insulating wall portions 221a and 221b are guided by the gaps G, the blocking portion 220 is positioned at a predetermined position in the opening 208, and then secured with bolts. In this way, the insulating wall portions 221a and 221b also function as guides when attaching the terminal cover 209 to the opening 208. This improves the workability when assembling the terminal cover 209.

[0037] According to the embodiment of the present invention described above, the following advantageous effects are achieved.

[0038] (1) As shown in Figures 2 to 6, the mechanically and electrically integrated rotating electric machine device 1 includes a rotating electric machine 10, a power conversion device 20 connected to the rotating electric machine 10, an inverter housing 20a (housing) that houses the rotating electric machine 10 and the power conversion device 20, a busbar module 30 that electrically connects a plurality of connection AC terminals 214U to 214W (first connection portions) of the power conversion device 20 to a plurality of motor side connection portions 10U to 10W (second connection portions) of the rotating electric machine 10, an opening 208 provided in a wall portion of the inverter housing 20a and facing the plurality of motor side connection portions 10U to 10W, and a terminal cover 209 (cover) that covers the opening 208. The bus bar module 30 has a plurality of bus bars 300U to 300W each having first bus bar connection portions 301U to 301W connected to the AC connection terminals 214U to 214W, extension portions 303U to 303W extending from the first bus bar connection portions 301U to 301W to the motor side connection portions 10U to 10W, and second bus bar connection portions 302U to 302W bent from the extension portions 303U to 303W to be connected to the motor side connection portions 10U to 10W, and the second bus bar connection portions 302U to 302W are arranged so that they are spaced apart from each other. and an electrically insulating busbar holder 310 that covers the extension portions 303U to 303W of the plurality of busbars 300U to 300W that are connected to the terminal cover 209. The terminal cover 209 has a blocking portion 220 (opening closing portion) that closes the opening 208, and electrically insulating insulating wall portions 221a, 221b (partition portions) that protrude from the blocking portion 220 toward the plurality of motor side connection portions 10U to 10W to which the second busbar connection portions 302U to 302W are connected and are inserted between adjacent second busbar connection portions 302U to 302W.

[0039] As described above, the insulating wall portions 221a, 221b of the terminal cover 209 are configured to be inserted between the second bus bar connection portions 302U-302W, ensuring interphase insulation at the bent and exposed second bus bar connection portions 302U-302W. As a result, the bus bar holder 310 can be configured to cover the extension portions 303U-303W excluding the second bus bar connection portions 302U-302W. This simplifies the shape of the insulating mold regardless of the shape of the second bus bar connection portions 302U-302W, and reduces the amount of molding material. In this way, the bus bar holder 310 and the terminal cover 209 ensure insulation at the extension portions 303U-303W, which are the routing areas of the bus bars 300U-300W, and at the second bus bar connection portions 302U-302W, which are the motor connection areas.

[0040] Furthermore, since the insulating wall portions 221a and 221b function as guides when the terminal cover 209 is attached to the opening 208, the workability when attaching the terminal cover 209 to the opening 208 can be improved.

[0041] (2) In the above (1), as shown in Figures 4 to 6, it is preferable that the busbar holder 310 integrally covers the plurality of extension portions 303U to 303W that are spaced apart. For example, when the mechanically and electrically integrated rotating electric machine device 1 is mounted on a vehicle, if the busbar holder 310 is not provided, the extension portions 303U to 303W will vibrate due to vehicle vibration, making the busbars more likely to become misaligned. On the other hand, by integrally covering the plurality of extension portions 303U to 303W with the busbar holder 310, the extension portions 303U to 303W can be suppressed.

[0042] 5 to 9, the busbar holder 310 includes an electrically insulating holder portion 310a (first holder member) that covers the front side of the plurality of extension portions 303U to 303W, and an electrically insulating holder portion 310b (second holder member) that covers the back side of the plurality of extension portions 303U to 303W.

[0043] In this way, by using a configuration in which extension portions 303U to 303W are sandwiched between two holder portions 310a and 310b, it is possible to simplify the shape of busbar holder 310. Furthermore, by using a sandwiching structure, a snap-fit ​​connection mechanism as shown in Fig. 10 can be applied, thereby simplifying the connection mechanism.

[0044] (4) In the above (3), as shown in Figure 9 and other figures, a partition 312 (first partition) of the holder portion 310a (first holder member) and a partition 313 (second partition) of the holder portion 310b (second holder member) are disposed in the gaps G11 and G12. The opposing surfaces of the partition 312 and the partition 313 have convex surfaces S1 and S4 and concave surfaces S2 and S3, respectively. The convex surface S1 of the partition 312 fits into the concave surface S3 of the partition 313, and the convex surface S4 of the partition 313 fits into the concave surface S2 of the partition 312. In this way, by forming the convex surfaces S1 and S4 and the concave surfaces S2 and S3 that fit into each other on the opposing surfaces of the partitions 312 and 313, the creepage distance between the phases is increased. As a result, the interphase insulation performance can be improved.

[0045] (5) In the above (1), the terminal cover 209 may be made of an electrically insulating material, as shown in Figures 11 and 12. By making the entire terminal cover 209, including the insulating wall portions 221a and 221b, of an electrically insulating material in this manner, processing costs can be reduced.

[0046] (6) In the above (5), as shown in Fig. 11, a metal plate 222 is embedded in the closing portion 220 (opening closing portion) of the terminal cover 209. By embedding the metal plate 222 in the closing portion 220 that covers the opening 208 in this way, the radiation noise generated by the AC current is blocked by the metal plate 222, and radiation noise leaking to the outside from the inverter housing 20a can be suppressed.

[0047] 6 and 11, the second bus bar connection portions 302U to 302W are bent from the extension portions 303U to 303W so that one of their front and back surfaces faces the opening 208, and the motor-side connection portions 10U to 10W (second connection portions) are arranged to face one of the front and back surfaces of the second bus bar connection portions 302U to 302W. The motor-side connection portions 10U to 10W and the second bus bar connection portions 302U to 302W, which are arranged to overlap in this manner, are arranged to face the opening 208, so that the fastening operation via the opening 208 can be easily performed.

[0048] In addition, the second bus bar connection portions 302U to 302W, which are bent from the extension portions 303U to 303W, are exposed from the bus bar holder 310 as shown in Figure 5, but interphase insulation is ensured by inserting the insulating wall portions 221a, 221b of the terminal cover 209 between adjacent second bus bar connection portions 302U to 302W.

[0049] The above-described embodiments and various modifications are merely examples, and the present invention is not limited to these details as long as the features of the invention are not impaired. Furthermore, although various embodiments and modifications have been described above, the present invention is not limited to these details. Other aspects conceivable within the scope of the technical idea of ​​the present invention are also included within the scope of the present invention.

[0050] 1... Mechanically and electrically integrated rotating electric machine device, 10... Rotating electric machine, 10U, 10V, 10W... Motor side connection portion, 20... Power conversion device, 10a... Motor housing, 20a... Inverter housing, 30... Bus bar module, 204n... Negative bus wire, 204p... Positive bus wire, 206... Module accommodating portion, 208... Opening, 209... Terminal cover, 210U, 210V, 210W... Power module, 212U, 212V, 212W... Connection P terminal, 213U, 213V, 213W... Connection N terminal, 214U, 214V, 214W...connection AC terminal, 221a, 221b...insulating wall portion, 220...blocking portion, 222...metal plate, 300U, 300V, 300W...bus bar, 301U, 301V, 301W...first bus bar connection portion, 302U, 302V, 302W...second bus bar connection portion, 303U, 303V, 303W...extension portion, 310...bus bar holder, 310a, 310b...holder portion, 311U, 311V, 311W...groove portion, 312, 313...partition portion, G, G11, G12...gap, S1, S4...convex portion, S2, S3...concave portion.

Claims

1. A method for manufacturing a semiconductor device comprising: a rotating electric machine; a power conversion device connected to the rotating electric machine; a housing that accommodates the rotating electric machine and the power conversion device; a bus bar module that electrically connects a plurality of first connection portions of the power conversion device and a plurality of second connection portions of the rotating electric machine; an opening provided in a wall of the housing facing the plurality of second connection portions; and a cover that covers the opening, wherein the bus bar module has a plurality of bus bars each having a first bus bar connection portion connected to the first connection portion, an extension portion extending from the first bus bar connection portion to the second connection portion, and a second bus bar connection portion bent from the extension portion to be connected to the second connection portion; and an electrically insulating bus bar holder that covers the extension portions of the plurality of bus bars arranged such that the second bus bar connection portions are spaced apart, and the cover has an opening closing portion that closes the opening, an electrically insulating partition portion protruding from the opening closure portion toward the plurality of second connection portions to which the second bus bar connection portions are connected, and inserted between adjacent second bus bar connection portions.

2. A mechanically and electrically integrated rotating electric device according to claim 1, wherein the busbar holder integrally covers a plurality of the extension portions arranged at a distance from each other.

3. A mechanically and electrically integrated rotating electric device as described in claim 2, wherein the bus bars are formed of plate-shaped conductors, the extension portions are arranged side by side with gaps in a direction perpendicular to the front-back direction of the plate-shaped conductor, and the bus bar holder comprises an electrically insulating first holder member covering the front side of the extension portions, and an electrically insulating second holder member covering the back side of the extension portions.

4. A mechanically and electrically integrated rotating electric device as described in claim 3, wherein a first partition portion of the first holder member and a second partition portion of the second holder member are arranged in the gap, the opposing surfaces of the first partition portion and the second partition portion each have a convex portion and a concave portion, the convex portion of the first partition portion fits into the concave portion of the second partition portion, and the convex portion of the second partition portion fits into the concave portion of the first partition portion.

5. A mechanically and electrically integrated rotating electric device according to claim 1, wherein the cover is made of an electrically insulating material.

6. A mechanically and electrically integrated rotating electric device as claimed in claim 5, wherein a metal plate is embedded in the opening closing portion of the cover.

7. A mechanically and electrically integrated rotating electric device as described in claim 3, wherein the second bus bar connection portion is bent from the extension portion so that one of its front and back sides faces the opening, and the second connection portion is positioned opposite one of the front and back sides of the second bus bar connection portion.

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