WO2017068719A1

WO2017068719A1 - Rotating electric machine device

Info

Publication number: WO2017068719A1
Application number: PCT/JP2015/079982
Authority: WO
Inventors: 敦明横山
Original assignee: 日産自動車株式会社
Priority date: 2015-10-23
Filing date: 2015-10-23
Publication date: 2017-04-27

Abstract

A supporting member (5) that supports a power conversion device (3) is attached to a rotating electric machine (1). The rotating electric machine (1) is provided with a first cooling flow channel (15a), the power conversion device (3) is provided with a second cooling flow channel (7a), and the supporting member (5) is provided with a third cooling flow channel (5a). The first cooling flow channel (15a) and the second cooling flow channel (7a) are in communication with each other via the third cooling flow channel (5a). A heat generating component (41) is attached to the supporting member (5) in a state of being thermally connected to the supporting member.

Description

Rotating electrical machine equipment

The present invention relates to a rotating electrical machine apparatus including a rotating electrical machine and a power converter.

Patent Document 1 discloses a technique in which a rotating electrical machine and a power conversion device are integrated by sharing a single housing. The power conversion device includes a power module that houses a power semiconductor element, a smoothing capacitor, and the like as inverter components. The housing is provided with a common cooling water channel that cools the rotating electrical machine and the power conversion device.

JP 2011-182480 A

A bus bar which is a conductive connecting member is used for connection between the coil of the rotating electrical machine and the power converter. At that time, heat generated in the coil of the rotating electrical machine is transmitted to the power conversion device via the bus bar, resulting in a high temperature of the power conversion device. However, since the technology of Patent Document 1 only cools the power conversion device by a cooling water channel shared with the rotating electrical machine, it is difficult to suppress heat transfer from the rotating electrical machine to the power conversion device via the bus bar. is there.

Therefore, an object of the present invention is to suppress heat transfer from the rotating electrical machine to the power converter.

In the present invention, the first cooling flow path of the rotating electrical machine and the second cooling flow path of the power converter are communicated with each other by the third cooling flow path of the support member. A heat generating component is attached to the support member that supports the power conversion device in a thermally connected state.

According to the present invention, the support member is cooled by the cooling medium flowing through the third cooling flow path, and the heat generating component is cooled by the cooled support member. In the power conversion device supported by the support member, the heat transfer from the heat generation component to the power conversion device is suppressed by cooling the heat generation component that is thermally connected to the support member, thereby increasing the temperature of the power conversion device. Can be suppressed.

FIG. 1 is an exploded perspective view of a rotating electrical machine apparatus according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view including a motor terminal corresponding to the AA cross section of FIG. FIG. 3 is a perspective view showing the periphery of the connection portion between the tray and the resin molded bus bar according to the second embodiment of the present invention. 4 is a cross-sectional view taken along the line BB of FIG. FIG. 5 is an exploded perspective view showing a state where the resin molded bus bar is removed from the tray of FIG. 3. 6A is a perspective view of a bus bar corresponding to the U-phase among the three bus bars shown in FIG. FIG. 6B is a perspective view of a bus bar corresponding to the V phase among the three bus bars shown in FIG. 3. 6C is a perspective view of a bus bar corresponding to the W phase among the three bus bars shown in FIG. 3. FIG. 7 is a perspective view showing the periphery of the tray according to the third embodiment of the present invention. FIG. 8A is a perspective view of a bus bar corresponding to the U-phase among the three bus bars shown in FIG. FIG. 8B is a perspective view of a bus bar corresponding to the V-phase among the three bus bars shown in FIG. 7. FIG. 8C is a perspective view of a bus bar corresponding to the W phase among the three bus bars shown in FIG. 7. 9 is a cross-sectional view taken along the line CC of FIG.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of the rotating electrical machine apparatus according to the first embodiment of the present invention. The rotating electrical machine apparatus of FIG. 1 includes a motor 1 as a rotating electrical machine and an inverter 3 as a power converter electrically connected to the motor 1. The inverter 3 is mounted and supported on a metal tray 5 as a support member. The rotating electrical machine apparatus here is mounted on, for example, a vehicle, and the motor 1 is used for driving the vehicle.

The motor 1 is, for example, a three-phase AC synchronous motor. The inverter 3 includes various electronic components such as a power module 7, a smoothing capacitor (not shown), and a control board, and converts power from a power source (not shown) to output power to be supplied to the motor 1.

Specifically, the inverter 3 converts a direct current fed from a high-voltage battery for driving a vehicle through a junction box into a three-phase alternating current by a power semiconductor and supplies the three-phase alternating current to the motor 1. The three-phase alternating current is a current corresponding to the target torque at a frequency synchronized with the motor rotation speed, and is generated by switching the semiconductor switching element with a PWM signal.

The motor 1 includes a housing 9 that is also used as the inverter 3. The housing 9 includes a motor housing 15 that houses the rotor 11 and the stator 13 of the motor 1, and an inverter housing 17 that houses the inverter 3. Therefore, the rotating electrical machine apparatus of the present embodiment is an electromechanical integrated type in which the motor 1 and the inverter 3 are integrated.

The motor housing 15 has a substantially cylindrical shape, and an opening formed on one side of the motor 1 in the rotation axis direction is closed by an end plate 19. The opening formed on the side opposite to the end plate 19 of the motor housing 15 is closed by a reduction gear housing 23 of the reduction gear 21 connected to the output shaft (rotating shaft) of the motor 1.

The inverter housing 17 has a substantially rectangular parallelepiped shape, and the upper end portion 17a side located in the upper portion in FIG. A tray mounting portion 17b for mounting and mounting the tray 5 is formed inside the motor housing 15 with respect to the upper end portion 17a of the inverter housing 17. The tray mounting portion 17b protrudes from the surrounding four wall portions inside the rectangular parallelepiped inverter housing 17.

The tray 5 that supports the inverter 3 is attached to the tray attachment portion 17b using, for example, bolts 25 or the like. With the tray 5 attached to the tray attachment portion 17b, the plate-like cover 27 is attached to the upper end portion 17a of the inverter housing 17 using, for example, bolts 29 or the like.

The motor housing 15 includes a motor cooling channel 15a as a first cooling channel. The power module 7 of the inverter 3 is obtained by integrating a semiconductor switching element or the like by resin molding, and a PM cooling channel 7a as a second cooling channel is provided in the resin mold part.

As shown in FIG. 2, the tray 5 that supports the inverter 3 includes a tray cooling channel 5 a as a third cooling channel on the lower surface in FIG. 2 on the side opposite to the inverter 3 (on the motor housing 15 side). ing. The tray cooling flow path 5 a is formed by, for example, welding and fixing the flow path forming member 31 to the lower surface of the tray 5. The flow path forming member 31 is attached to the lower surface of the tray 5 so as to meander, for example.

As shown in FIG. 2, the tray cooling channel 5 a is connected to the PM cooling channel 7 a of the power module 7 by providing a through hole 5 b in the tray 5, for example. Two communication connection portions between the tray cooling flow path 5a and the PM cooling flow path 7a through such a through hole 5b are set. One of the through holes 5b is used as an inlet for cooling liquid from the tray cooling flow path 5a to the PM cooling flow path 7a, and the other through hole 5b is used for cooling liquid from the PM cooling flow path 7a to the tray cooling flow path 5a. Take the exit.

That is, the coolant flowing through the tray cooling flow path 5a for a certain distance flows into the PM cooling flow path 7a from one through hole 5b and flows for a certain distance. For example, a cooling liquid is introduced into the tray cooling flow path 5 a from a cooling liquid inlet 35 provided on the side of the inverter housing 17. The coolant that has flowed through the PM cooling flow path 7a for a certain distance flows out from the other through hole 5b to the tray cooling flow path 5a and flows for a certain distance. Thereby, the tray 5 and the power module 7 are cooled by the coolant.

The coolant that has flowed out from the other through-hole 5b to the tray cooling flow path 5a and has flowed for a certain distance flows out to the flow path connecting pipe 33 shown in FIG. That is, one end on the upper side in FIG. 1 of the flow path connecting pipe 33 is connected to the tray cooling flow path 5a. The other end 33 a on the lower side of the flow path connecting pipe 33 in FIG. 1 is connected to the motor cooling flow path 15 a of the motor housing 15. The motor 1 is cooled by the coolant flowing into the motor cooling channel 15a from the channel connecting pipe 33. The coolant that has flowed through the motor cooling passage 15 a is discharged to the outside from a coolant outlet 37 provided on the side of the motor housing 15.

From the above, the tray cooling flow path 5a and the PM cooling flow path 7a are connected to each other via the through hole 5b, and the tray cooling flow path 5a and the motor cooling flow path 15a are connected via the flow path connecting pipe 33. They are in communication with each other. Therefore, the motor cooling channel 15a that is the first cooling channel and the PM cooling channel 7a that is the second cooling channel communicate with each other via the tray cooling channel 5a that is the third cooling channel. It is connected. The speed reducer 21 may be cooled by flowing a coolant through a speed reducer cooling flow path 23 a provided in the speed reducer housing 23.

The stator coil lead portions 39 (39U, 39V, 39W) corresponding to the U phase, V phase, and W phase in the stator 13 of the motor 1 are connected to one end of the motor terminal 41 (41U, 41V, 41W), respectively. Has been. The other end of the motor terminal 41 (41U, 41V, 41W) includes a bent connection portion 41a (41Ua, 41Va, 41Wa) that bends toward the power module 7 side.

On the other hand, one end of a bus bar 43 (43U, 43V, 43W) corresponding to the U phase, V phase, and W phase is connected and fixed by a bolt 45 on the end portion of the power module 7 on the side where the end plate 19 is located. . The other end of the bus bar 43 (43U, 43V, 43W) is connected and fixed using a bolt 47 to the bent connection portion 41a (41Ua, 41Va, 41Wa) of the motor terminal 41 (41U, 41V, 41W).

Therefore, the stator coil lead portion 39 of the motor 1 and the power module 7 are connected to each other via the motor terminal 41 and the bus bar 43. The motor terminal 41 and the bus bar 43 constitute a conductive connection member.

A current sensor 49 is attached to the bus bar 43 (43U, 43V, 43W) as shown in FIG. The current sensor 49 detects a current flowing from the power module 7 toward the bus bar 43. In FIG. 1, the current sensor 49 is omitted.
The current sensor 49, the inverter 3 including the power module 7 and the smoothing capacitor, the motor terminal 41, and the bus bar 43 constitute a heat generating component.

As shown in FIG. 2, the tray 5 is formed with a connection fixing portion 5c that is bent toward the upper bent connection portion 41a (41Ua, 41Va, 41Wa) at the end protruding toward the motor terminal 41 side. Yes. The connection fixing portion 5c is substantially parallel to the motor terminal 41 (41U, 41V, 41W), and the resin plate 51 made of an electrically insulating material is interposed between the motor terminal 41 (41U, 41V, 41W). Has been placed. The resin plate 51 uses a material having higher thermal conductivity.

The connection fixing portion 5c of the tray 5, the motor terminal 41 (41U, 41V, 41W), and the resin plate 51 are fixed by, for example, a clip 53, which is a resin fixture made of an electrically insulating material. That is, the motor terminal 41 that is a heat generating component is attached in a state of being thermally connected to the connection fixing portion 5c of the tray 5 that is a support member. Therefore, the connection fixing part 5c of the tray 5 constitutes a thermal connection part to which the motor terminal 41 is thermally connected.

Next, the operation of the first embodiment will be described.

When three-phase current is supplied from the power module 7 to the stator 13 of the motor 1 through the bus bar 43 (43U, 43V, 43W) and the motor terminal 41 (41U, 41V, 41W), copper loss occurs particularly at high output. By concentrating, the stator coil becomes hot.

The heat generated in the stator coil is transmitted from the motor terminal 41 to the power module 7 through the bus bar 43, contrary to the current flow. At this time, the tray 5 is cooled by the coolant flowing through the tray cooling flow path 5 a while being connected to the motor terminal 41. For this reason, most of the heat transmitted from the stator coil to the motor terminal 41 is transmitted to the tray 5 before being transmitted to the bus bar 43 to cool the motor terminal 41.

When the motor terminal 41 is cooled, heat transfer from the heat generated in the stator coil to the power module 7 is suppressed, and the overall temperature of the inverter 3 including the power module 7 is suppressed. Since the high temperature of the bus bar 43 is also suppressed, the high temperature of the current sensor 49 attached to the bus bar 43 is also suppressed, and the current detection accuracy is improved.

The cooling liquid that flows through the tray cooling flow path 5 a and cools the tray 5 is also used as the cooling liquid that flows through the motor cooling flow path 15 a of the motor 1 and the PM cooling flow path 7 a of the power module 7. For this reason, it is not necessary to separately provide a dedicated cooling path for cooling the tray 5, the cooling structure can be simplified correspondingly, and the manufacturing cost can be kept low.

In the first embodiment, the connection fixing portion 5c, which is a thermal connection portion to which the motor terminal 41 of the tray 5 is thermally connected, is made of a metal having high thermal conductivity. For this reason, the cooling effect with respect to the motor terminal 41 is further enhanced as compared with the case where the thermal connection portion is made of another substance such as a resin.

In order to further enhance the cooling effect on the motor terminal 41, there are the following measures. 1) A part of the tray cooling flow path 5a is brought as close to the motor terminal 41 as possible. 2) Increase the heat capacity by increasing the cross-sectional area (volume) of the tray 5. 3) The resin plate 51 is made thinner. 4) The region where the connection fixing portion 5c of the tray 5 and the motor terminal 41 are thermally connected is further increased.

Next, a second embodiment of the present invention will be described.

FIG. 3 shows a portion where the tray 5A of the second embodiment is thermally connected to the bus bar 43A (43UA, 43VA, 43WA) and the motor terminal 41A (41UA, 41VA, 41WA). As shown in FIGS. 4 and 5, the tray 5 A has a plate-like tray body 5 Aa as a whole, and includes a bending portion 5 Ab at one corner of the tray body 5 Aa. A resin molded bus bar 55 as a heat generating component is attached to the bending portion 5Ab.

The tray 5A is attached to the inverter housing 17 of the motor 1 of FIG. 1 in the same manner as the tray 5 of the first embodiment. At that time, the tray 5A has a bent shape portion 5Ab to which the resin molded bus bar 55 is mounted, and thus the overall shape is different from that of the tray 5 of the first embodiment. It becomes.

The bent portion 5Ab is formed of side walls 5Ab1 and 5Ab2 rising from the two side edges at the corner of the tray body 5Aa at an angle of approximately 90 degrees, and parallel to the tray body 5Aa from the end of the side walls 5Ab1 and 5Ab2. And folding walls 5Ab3 and 5Ab4 that bend so as to be folded back toward each other. The front end side of the folded walls 5Ab3 and 5Ab4 is an opening 5Ac facing the side walls 5Ab1 and 5Ab2.

The tray body 5Aa includes an opposing wall 5Aa1 that faces the folded walls 5Ab3 and 5Ab4. Therefore, the folding walls 5Ab3, 5Ab4 and the opposing wall 5Aa1 constitute two opposing surfaces that oppose each other. Moreover, side wall 5Ab1 and 5Ab2 comprise one connection surface which connects the one edge parts of two opposing surfaces. The two opposing surfaces and one connection surface function as a plurality of cooling surfaces in the thermal connection portion.

The resin mold bus bar 55 includes a bus bar 43A (43UA, 43VA, 43WA) as a heat generating portion main body and a resin molding portion 57 that integrally molds the bus bar 43A with resin. The resin molding portion 57 is attached to the folding molding portion 5Ab of the tray 5A so as to cover the three cooling surfaces of the folding walls 5Ab3, 5Ab4, the opposing wall 5Aa1, and the side walls 5Ab1, 5Ab2 of the tray 5A.

That is, the resin molding portion 57 includes an upper wall 57a that covers the outer wall of the folded walls 5Ab3 and 5Ab4 in close contact with the outer wall, a lower wall 57b that covers the outer wall of the opposing wall 5Aa1, and a side wall 5Ab1. , 5Ab2 and a side wall 57c that covers the outer surface in close contact with the outer surface.

The upper wall 57a, the lower wall 57b, and the side wall 57c are bent in a substantially L shape in accordance with the corners of the tray 5A. The upper wall 57a includes a motor-side upper wall 57a1 and a PM-side upper wall 57a2, the lower wall 57b includes a motor-side lower wall 57b1 and a PM-side lower wall 57b2, and the side wall 57c includes the motor-side side wall 57c1 and the PM. Side wall 57c2.

As shown in FIG. 6A, the bus bar 43UA includes a motor side fixing portion 43UAa connected and fixed to the motor terminal 41UA and a PM side fixing portion 43UAb connected and fixed to the power module 7.

A part of the motor side fixing portion 43UAa is embedded in the motor side upper wall 57a1 of the resin molding portion 57, and the tip side protrudes outside from the motor side upper wall 57a1 as shown in FIG. 3 and is fixed to the motor terminal 41UA by the bolt 59. The Part of the PM-side fixing portion 43UAb is embedded in the PM-side upper wall 57a2 of the resin molding portion 57, and the tip side protrudes outside from the PM-side upper wall 57a2 and is fixed to the power module 7 by the bolt 61.

An extension portion 43UAc is formed between the motor side fixing portion 43UAa and the PM side fixing portion 43UAb. The extension portion 43UAc bends 90 degrees with respect to the motor side fixing portion 43UAa, is parallel to the PM side fixing portion 43UAb, and is embedded in the motor side upper wall 57a1 and the PM side upper wall 57a2. The extension 43UAc is arranged in parallel to the folding walls 5Ab3 and 5Ab4 in a state of facing the folding walls 5Ab3 and 5Ab4 of the tray 5.

As shown in FIG. 6B, the bus bar 43VA includes a motor side fixing portion 43VAa connected and fixed to the motor terminal 41VA and a PM side fixing portion 43VAb fixed and connected to the power module 7.

A part of the motor side fixing portion 43VAa is embedded in the motor side upper wall 57a1 and the motor side side wall 57c1, and the tip side protrudes from the motor side upper wall 57a1 to the outside as shown in FIG. 3, and is fixed to the motor terminal 41VA by a bolt 63. The Part of the PM-side fixing portion 43VAb is mainly embedded in the PM-side upper wall 57a2, and the tip side protrudes outside from the PM-side upper wall 57a2 as shown in FIG.

An extension portion 43VAc is formed between the motor side fixing portion 43VAa and the PM side fixing portion 43VAb. The extension 43VAc includes a motor side extension 43VAc1 and a PM side extension 43VAc2.

The motor side extension 43VAc1 is bent 90 degrees with respect to the motor side fixing part 43VAa, is parallel to the PM side fixing part 43VAb, and is mainly embedded in the motor side lower wall 57b1. The motor side extension 43VAc1 is arranged in parallel to the facing wall 5Aa1 in a state of facing the facing wall 5Aa1 of the tray 5.

The PM side extension portion 43VAc2 is bent 90 degrees with respect to the PM side fixing portion 43VAb and is embedded in the PM side wall 57c2. The PM side extension 43VAc2 is arranged in parallel to the side wall 5Ab2 in a state of facing the side wall 5Ab2 of the tray 5.

As shown in FIG. 6C, the bus bar 43WA includes a motor side fixing portion 43WAa connected and fixed to the motor terminal 41WA, and a PM side fixing portion 43WAb connected and fixed to the power module 7.

A part of the motor side fixing portion 43WAa is embedded in the motor side upper wall 57a1 and the motor side side wall 57c1, and the tip side protrudes from the motor side upper wall 57a1 to the outside as shown in FIG. 3 and is fixed to the motor terminal 41WA by a bolt 67. The Part of the PM-side fixing portion 43WAb is mainly embedded in the PM-side upper wall 57a2, and the tip side protrudes outside from the PM-side upper wall 57a2 as shown in FIG.

An extension portion 43WAc is formed between the motor side fixing portion 43WAa and the PM side fixing portion 43WAb. The extension portion 43WAc includes a motor side extension portion 43WAc1 and a PM side extension portion 43WAc2.

The motor side extension portion 43WAc1 is bent 90 degrees with respect to the motor side fixing portion 43WAa, is parallel to the PM side fixing portion 43WAb, and is embedded in the motor side lower wall 57b1 and the PM side lower wall 57b2. The motor side extension 43WAc1 is arranged in parallel to the facing wall 5Aa1 in a state of facing the facing wall 5Aa1 of the tray 5.

The PM side extension portion 43WAc2 is bent 90 degrees with respect to the PM side fixing portion 43WAb, and is embedded in the main PM side wall 57c2. The PM side extension 43WAc2 is arranged in parallel to the side wall 5Ab2 in a state of facing the side wall 5Ab2 of the tray 5.

The lower surface of the tray body 5Aa opposite to the power module 7 is provided with a tray cooling channel (not shown) similar to the tray cooling channel 5a in the first embodiment. Similar to the first embodiment, the tray cooling flow path is connected to both the PM cooling flow path 7a and the motor cooling flow path 15a shown in FIG.

Next, the operation of the second embodiment will be described.

In the second embodiment, the heat generated in the stator coil of the motor 1 is transmitted to the motor terminal 41A and then to the bus bar 43A. On the other hand, the bus bar 43A is integrally formed with the resin molding portion 57, and the resin molding portion 57 is fixed in close contact with the outer surface of the folding molding portion 5Ab of the tray 5A.

At this time, the entire tray 5A including the bent portion 5Ab is cooled by a coolant flowing through a tray cooling flow path (not shown). By cooling the bending part 5Ab, the resin molding part 57 fixed in close contact with the bending part 5Ab is cooled, and the bus bar 43A embedded in the resin molding part 57 is also cooled.

When the bus bar 43A is cooled, the transmission of heat transmitted to the motor terminal 41A to the power module 7 is suppressed. Therefore, heat transfer to the power module 7 of heat generated in the stator coil of the motor 1 is suppressed, and the overall temperature of the inverter 3 including the power module 7 is suppressed. In the second embodiment as well, although not shown, the temperature of the current sensor is suppressed from increasing, and the current detection accuracy is improved.

The second embodiment includes a folding wall 5Ab3, 5Ab4, an opposing wall 5Aa1, and side walls 5Ab1, 5Ab2, each of the walls 5Ab3, 5Ab4, 5Aa1, 5Ab1, and 5Ab2 having three cooling surfaces. A resin molded portion 57 is provided so as to cover it. For this reason, the resin mold bus bar 55 including the bus bar 43A and the resin molding portion 57 is efficiently cooled from the inside where the bending molding portion 5Ab is located by the tray 5A cooled by the coolant.

Similarly to the tray 5 of the first embodiment, the folding wall 5Ab3, 5Ab4, the opposing wall 5Aa1, and the side walls 5Ab1, 5Ab2 that are thermal connection portions of the tray 5A of the second embodiment have thermal conductivity. Consists of high metal. For this reason, the cooling effect with respect to the motor terminal 41A is further enhanced as compared with the case where the thermal connection portion is made of another substance such as a resin.

In the second embodiment, the bus bar 43A (43UA, 43VA, 43WA) is extended so as to be provided along the extending direction of the bending portion 5Ab of the tray 5A. For this reason, the heat dissipation area of the bus bar 43A with respect to the tray 5 is significantly larger than that of the first embodiment, and the cooling effect on the bus bar 43A is increased.

Further, in the second embodiment, the bus bar 43A is integrally formed with the resin molding portion 57 to form a resin molded bus bar 55, and the resin molded bus bar 55 is fitted into the folding molding portion 5Ab of the tray 5A. For this reason, the mounting of the resin molded bus bar 55 to the tray 5A can be automated and simplified, and the assembly workability is improved.

Note that the bending portion 5Ab of the tray 5 in the second embodiment is provided at one corner of the rectangular tray main body 5Aa, but is provided linearly along one side of the rectangular shape of the tray main body 5Aa. May be. The resin mold bus bar 55 is also formed in a straight line shape in accordance with the bending portion 5Ab. However, if the bending portion 5Ab is provided at one corner of the tray main body 5Aa, the entire tray 5 including the bending portion 5Ab can be made more compact.

Further, in order to further enhance the heat transfer between the bent molded portion 5Ab and the resin molded portion 57, the following measures can be considered. A resin having high thermal conductivity is applied to the contact surface between the bent molding part 5Ab and the resin molding part 57. The contact pressure is further increased by using an interference fit between the bent molded portion 5Ab and the resin molded portion 57 as an interference fit.

Next, a third embodiment will be described.

FIG. 7 is a perspective view corresponding to FIG. 3 according to the third embodiment. In the third embodiment, the tray 5B is made of resin. The tray 5B includes tray cooling flow paths 5Ba and 5Bb through which the coolant flows. The tray cooling flow paths 5Ba and 5Bb are formed by integrally forming the flow

path forming pipes

71 and 73 on the resin tray 5B.

The tray 5B is attached to the inverter housing 17 of the motor 1 of FIG. 1 in the same manner as the tray 5 of the first embodiment. At that time, since the overall shape of the tray 5B is slightly different from that of the tray 5 of the first embodiment, a slight change in the shape of the inverter housing 17 may be required.

The flow path forming pipe 71 has one end 71a protruding from the side surface of the tray 5B to the outside, and the coolant flows into the tray cooling flow path 5Ba from the one end 71a. The other end 71b of the flow path forming pipe 71 is connected to a PM cooling flow path (not shown) in the power module 7, and the coolant flowing out from the other end 71b flows into the PM cooling flow path.

The coolant flowing through the PM cooling flow path flows into the tray cooling flow path 5Bb from one end 73a of the flow path forming pipe 73. The other end 73b of the flow path forming tube 73 protrudes from the lower surface of the tray 5B opposite to the power module 7. The coolant flowing through the tray cooling flow path 5Bb flows out from the other end 73b and flows into the motor cooling flow path 15a shown in FIG.

Further, a bus bar 43B (43UB, 43VB, 43WB) is integrally formed on the tray 5B. As shown in FIG. 8A, the bus bar 43UB includes a motor side fixing portion 43UBa connected and fixed to the motor terminal 41UB and a PM side fixing portion 43UBb connected and fixed to the power module 7.

The front end side of the motor side fixing portion 43UBa protrudes from the side portion of the tray 5B and is fixed to the motor terminal 41UB by a bolt 75. The PM side fixing portion 43UBb protrudes outward from the surface of the tray 5B and is fixed to the power module 7 with bolts 77.

An extension portion 43UBc is formed between the motor side fixing portion 43UBa and the PM side fixing portion 43UBb. The extension portion 43UBc includes a portion that is substantially L-shaped while being bent 90 degrees with respect to the motor-side fixing portion 43UBa. A portion of the extension 43UBc that is substantially L-shaped is disposed along one side of the bent portion of the flow path forming tube 73.

As shown in FIG. 8B, the bus bar 43VB includes a motor side fixing portion 43VBa connected and fixed to the motor terminal 41VB and a PM side fixing portion 43VBb connected and fixed to the power module 7.

The front end side of the motor side fixing portion 43VBa protrudes from the side portion of the tray 5B and is fixed to the motor terminal 41VB by the bolt 79. The PM side fixing portion 43VBb protrudes outward from the surface of the tray 5B and is fixed to the power module 7 with bolts 81.

An extension portion 43VBc is formed between the motor side fixing portion 43VBa and the PM side fixing portion 43VBb. The extension portion 43VBc is provided with a portion that is substantially L-shaped while being formed on the same plane with respect to the motor-side fixing portion 43VBa. The portion of the extension 43VBc that is substantially L-shaped is disposed along the lower side in FIG. 7 in the bent portion of the flow path forming tube 73.

As shown in FIG. 8C, the bus bar 43WB includes a motor side fixing portion 43WBa connected and fixed to the motor terminal 41WB and a PM side fixing portion 43WBb connected and fixed to the power module 7.

The front end side of the motor side fixing portion 43WBa protrudes from the side portion of the tray 5B and is fixed to the motor terminal 41WB by a bolt 83. The PM side fixing portion 43WBb protrudes outward from the surface of the tray 5B and is fixed to the power module 7 with a bolt 85.

An extension portion 43WBc is formed between the motor side fixing portion 43WBa and the PM side fixing portion 43WBb. The extension portion 43WBc includes a portion that is substantially L-shaped while being bent 90 degrees with respect to the motor-side fixing portion 43WBa. A portion of the extension portion 43WBc that is substantially L-shaped is disposed along the other side portion of the bent portion of the flow path forming tube 73.

As shown in FIG. 9 which is a CC cross-sectional view of FIG. 7, the flow path forming pipe 73 having the tray cooling flow path 5Bb has the bus bars 43UB, 43WB, and 43VB extending on the left and right sides and the lower side. It is in a state surrounded by 43UBc, 43WBc, and 43VBc.

Next, the operation of the third embodiment will be described.

In the third embodiment, the heat generated in the stator coil of the motor 1 is transmitted to the motor terminal 41B and then to the bus bar 43B. On the other hand, the bus bar 43B is integrally formed with the resin tray 5B, and the tray 5B is cooled by the coolant flowing through the tray cooling flow paths 5Ba and 5Bb. Since the tray 5B is cooled, the bus bar 43B is also cooled.

When the bus bar 43B is cooled, transmission of heat transmitted to the motor terminal 41B to the power module 7 is suppressed. Therefore, heat transfer to the power module 7 of heat generated in the stator coil of the motor 1 is suppressed, and the overall temperature of the inverter 3 including the power module 7 is suppressed. In the third embodiment as well, although not shown, the temperature of the current sensor is suppressed from being increased, and the current detection accuracy is improved.

In the third embodiment, the extensions 43UBc, 43VBc, 43WBc of the bus bars 43B (43UB, 43VB, 43WB) are provided along the extending direction of the flow path forming pipe 73 including the tray cooling flow path 5Bb. Has been placed. For this reason, the thermal radiation area | region with respect to the cooling fluid of the bus bar 43B increases more, and the cooling effect with respect to the bus bar 43B increases.

In the third embodiment, as shown in FIG. 9, the bus bar 43B (43UB, 43VB, 43WB) is disposed so as to surround the periphery of the flow path forming pipe 73 including the tray cooling flow path 5Bb. At that time, the two bus bars 43UB and 43WB are arranged on both sides of the tray cooling flow path 5Bb with the tray cooling flow path 5Bb in between, and one bus bar 43VB is arranged below the tray cooling flow path 5Bb. . For this reason, the bus bar 43B (43UB, 43VB, 43WB) is efficiently cooled by the coolant flowing through one tray cooling flow path 5Bb.

In the third embodiment, the tray 5B is made of resin. For this reason, the weight reduction of the tray 5B can be achieved.

In the third embodiment, flow

path forming pipes

71 and 73 having tray cooling flow paths 5Ba and 5Bb and a bus bar 43B are integrally formed on the tray 5B. For this reason, the operation | work which assembles a resin mold bus bar to a tray like 2nd Embodiment becomes unnecessary, manufacture is simplified more, and assembly | attachment workability | operativity improves.

In the third embodiment, the flow

path forming pipes

71 and 73 and the bus bar 43B are integrally formed on the resin tray 5B. However, only the bus bar 43B may be integrally formed. In this case, the tray 5B is resin-molded in a state of being divided into two in the upper and lower directions in FIG. Thereby, a tray cooling flow path is formed in the tray 5B, and it is not necessary to integrally form the flow

path forming pipes

71 and 73 in the tray 5B, thereby reducing the number of parts.

In the third embodiment, for example, as shown in FIG. 9, a flow path forming tube 87 may be provided on the opposite side of the extension portion 43WBc to the flow path forming tube 73 with the extension portion 43WBc of the bus bar 43WB in between. That is, the tray cooling flow path may be provided on both sides of the bus bar with the bus bar interposed therebetween. Thereby, the cooling effect with respect to a bus-bar increases more.

Further, in the second and third embodiments, similarly to the first embodiment, the coolant that flows through the tray cooling flow path and cools the

trays

5A and 5B is the motor cooling flow path 15a of the motor 1 and the power module. 7 is also used as a coolant flowing through the PM cooling flow path 7a. For this reason, it is not necessary to separately provide a dedicated cooling path for cooling the

trays

5A and 5B, the cooling structure can be simplified correspondingly, and the manufacturing cost can be kept low.

As mentioned above, although embodiment of this invention was described, these embodiment is only the mere illustration described in order to make an understanding of this invention easy, and this invention is not limited to the said embodiment. The technical scope of the present invention is not limited to the specific technical matters disclosed in the above embodiment, but includes various modifications, changes, alternative techniques, and the like that can be easily derived therefrom.

For example, the present invention can be applied not only to an inverter as a power converter, but also to a DC-DC converter, and the present invention can be applied to a generator as well as a motor as a rotating electrical machine.

In the above-described embodiment, the tray 5 is attached to the inverter housing 17, but may be attached to other parts such as a motor housing.

The three bus bars 43A of the second embodiment shown in FIGS. 3 and 4 are not limited to the shapes shown in FIGS. 6A, 6B, and 6C. It is only necessary that the three bus bars 43A are integrally formed with the resin molding portion 57 in a state where they are electrically insulated from each other and electrically insulated from the metal tray 5A. In this case, the bus bar 43A has a longer heat dissipation effect by making the length in the extending direction longer.

The three bus bars 43B of the third embodiment shown in FIG. 7 are not limited to the shapes shown in FIGS. 8A, 8B, and 8C. The three bus bars 43B may be formed integrally with the resin tray 5B while being electrically insulated from each other. In this case, the bus bar 43 B further increases the heat dissipation effect by increasing the length of the portion provided alongside the flow path forming pipe 73.

The present invention is applied to a rotating electrical machine apparatus including a rotating electrical machine and a power converter.

1 Motor (Rotating electric machine)
3 Inverter (power converter, heat-generating component)
5,5A Metal tray (support member)
5c Tray connection fixing part (thermal connection part)
5a Tray cooling channel (third cooling channel)
5B Resin tray (support member)
5Ba, 5Bb Tray cooling channel (third cooling channel)
7 Power modules (heat generating parts)
7a PM cooling flow path (second cooling flow path)
15a Motor cooling flow path (first cooling flow path)
41, 41A, 41B Motor terminal (conductive connection member, heat generating component)
43, 43B Bus bar (conductive connection member, heat generating component)
43A Bus bar (conductive connection member, heat generating body, heat generating component)
49 Current sensor (heat-generating component)
55 Resin Molded Bus Bar (Heat-generating parts)

Claims

A rotating electrical machine comprising a first cooling flow path;
A power converter connected to the rotating electrical machine and provided with a second cooling flow path;
A support member that supports the power conversion device and includes a third cooling flow path;
The first cooling channel and the second cooling channel communicate with each other via the third cooling channel;
A rotating electrical machine apparatus, wherein the heat generating component is attached to the support member in a thermally connected state.
The rotating electrical machine apparatus according to claim 1, wherein a thermal connection portion to which the heat generating component of the support member is thermally connected is made of metal.
The rotating electrical machine apparatus according to claim 2, wherein the thermal connection portion of the support member includes a plurality of cooling surfaces for the heat generating component.
The heat generating component includes a heat generating portion main body, and a resin molded portion in which the heat generating portion main body is integrally formed of resin,
The thermal connection portion of the support member includes, as the plurality of cooling surfaces, two opposing surfaces facing each other, one connection surface connecting one end of the two opposing surfaces, and the connection surface. An opposing opening,
4. The rotating electrical machine apparatus according to claim 3, wherein the resin molding portion of the heat generating component is attached so as to cover three cooling surfaces of two opposing surfaces and one connection surface of the support member. .
The rotating electrical machine apparatus according to claim 1, wherein the support member is made of resin.
6. The rotating electrical machine apparatus according to claim 5, wherein the third cooling flow path and the heat generating component are integrally formed with the resin support member.
The rotating electrical machine apparatus according to claim 6, wherein the heat generating component is disposed on both sides of the third cooling flow path with the third cooling flow path in the support member. .
The rotating electrical machine apparatus according to claim 6 or 7, wherein the third cooling flow path is disposed on both sides of the heat generating component with the heat generating component in between in the support member.
The rotating electrical machine apparatus according to any one of claims 1 to 8, wherein the heat generating component is a conductive connection member that connects the rotating electrical machine and the power converter.