JP2017189052A - Rotary electric machine with built-in inverter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform wiring for electrically connecting a rotary electric machine and an inverter in the rotary electric machine with a built-in inverter in which the inverter, a heat sink, and a cooling fan are arranged on an anti-output side of the rotary electric machine.SOLUTION: Tips of terminals 120, 121, 122 of an inverter 50 are exposed to the outside of a cover 100 from a lid part 102 of a cover 100. In a cylinder part 101 of the cover 100, a terminal block 44 is provided connecting lead wires 40, 41, 42 and one end parts of bus bars 110, 111, 112. The bus bars 110, 111, 112, each of which has a shape bent toward the tips of the terminals 120, 121, 122 of the inverter 50 from the terminal block 44.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inverter-integrated rotating electrical machine.

  As a configuration of an inverter-integrated rotating electrical machine, a structure in which a rotating electrical machine (motor) and an inverter are integrated and a cooling fan is provided between the rotating electrical machine and the inverter is known (see Patent Documents 1 and 2). Specifically, an inverter and a cooling fan are arranged on the side opposite to the output shaft of the rotating electrical machine, and the components of the inverter are cooled by cooling air from a cooling fan that rotates integrally with the shaft of the rotating electrical machine.

JP 2005-192364 A JP-A-9-84294

By the way, in a structure having a cooling fan between the rotating electrical machine and the inverter heat sink, there is a demand for a structure that facilitates wiring connection between the rotating electrical machine and the inverter.
It is an object of the present invention to easily perform wiring for electrically connecting a rotary electric machine and an inverter in an inverter-integrated rotary electric machine in which an inverter, a heat sink, and a cooling fan are arranged on the non-output side of the rotary electric machine. There is to be able to do it.

  In the invention according to claim 1, a rotating electrical machine in which a rotor is disposed in the housing, an output side of the shaft protrudes from one surface of the housing, and an opposite output side of the shaft protrudes from the other surface of the housing; A cooling fan that is fixed to the non-output side of the shaft outside the housing and rotates as the shaft rotates, and is disposed away from the cooling fan on the non-output side of the shaft outside the housing, and dissipates heat. A heat sink in which a surface faces the cooling fan and an air flow generated as the cooling fan rotates passes through the heat radiating surface, and an inverter for driving the rotating electrical machine, with components disposed on the component placement surface of the heat sink And, the cylindrical part is covered with a lid part and forms a covered cylinder, arranged on the opposite output side of the shaft, An inverter-integrated rotating electrical machine comprising: a cover that covers the component disposed on the component placement surface of the heat sink; and a drawer that is pulled out from the rotating electrical machine and electrically connects the rotating electrical machine and the inverter And a bus bar having one end connected to the lead wire and the other end connected to a terminal of the inverter, and the lead wire is connected to the outer periphery of the cooling fan and the heat sink from the rotating electrical machine. A terminal block is provided to connect the lead wire and one end of the bus bar to the cylindrical portion of the cover, the tip of the terminal being exposed to the outside of the cover from the lid portion of the cover. The bus bar has a shape bent from the terminal block toward the tip of the terminal.

  According to the first aspect of the present invention, the lead wire for electrically connecting the rotating electrical machine and the inverter is connected to one end of the bus bar and the other end is connected to the terminal of the inverter. The lead line extends from the rotating electrical machine so as to straddle the outer periphery of the cooling fan and the heat sink. The tip of the terminal is exposed to the outside of the cover from the cover lid. The lead wire and one end of the bus bar are connected to each other by a terminal block provided on the cylindrical portion of the cover, and the bus bar has a shape bent from the terminal block toward the tip of the terminal.

  Therefore, in the inverter-integrated rotating electrical machine in which the inverter, the heat sink, and the cooling fan are arranged on the non-output side of the rotating electrical machine, wiring for electrically connecting the rotating electrical machine and the inverter can be easily performed.

As described in claim 2, in the inverter-integrated dynamoelectric machine according to claim 1, the cover and the terminal block may be integrally formed.
The inverter-integrated rotating electrical machine according to claim 1 or 2, wherein the first sealing material that seals between the cover and the heat sink, and the lid and the terminal are provided. It is good to have the 2nd sealing material which seals.

  The inverter-integrated rotating electrical machine according to any one of claims 1 to 3, wherein the fastening direction of the cover with respect to the heat sink and the fastening direction of the bus bar with respect to the terminals are the same direction. It is good to be.

  According to the present invention, in an inverter-integrated rotating electrical machine in which an inverter, a heat sink, and a cooling fan are arranged on the non-output side of the rotating electrical machine, wiring for electrically connecting the rotating electrical machine and the inverter can be easily performed. it can.

The longitudinal cross-sectional view of the inverter integrated rotary electric machine in embodiment. The perspective view of an inverter integrated rotating electrical machine. The disassembled perspective view of an inverter integrated rotating electrical machine. The front view of the thermal radiation surface in a heat sink. The front view of the component arrangement | positioning surface in a heat sink. The longitudinal cross-sectional view of the inverter integrated rotary electric machine in a comparative example.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIGS. 1, 2, and 3, the inverter-integrated rotating electrical machine (motor / inverter unit) 10 includes a rotating electrical machine 20, an inverter 50, a metal heat sink 60, a cooling fan (centrifugal fan) 80, A rectifying plate 90 and a cover 100 that covers the inverter 50 are provided. The inverter-integrated rotating electrical machine 10 is mounted on a vehicle. A cooling fan 80, a rectifying plate 90, a heat sink 60, and an inverter 50 are arranged in order on the axis O on the opposite side of the shaft 30 outside the housing 21 of the rotating electrical machine 20. The rectifying plate 90 and the heat sink 60 are arranged so as to extend in the radial direction orthogonal to the direction in which the shaft 30 extends. As the cooling fan 80 fixed to the shaft 30 of the rotating electrical machine 20 rotates, an air flow is formed. The air passes through the heat sink 60 and can be exchanged with the heat of the inverter 50. .

The rotating electrical machine 20 will be described in detail.
As shown in FIG. 1, in the present embodiment, the rotating electrical machine 20 is a hermetically sealed three-phase induction motor.

  The rotating electrical machine 20 includes a housing 21, a cylindrical stator 22, and a rotor 23. A rotor 23 is rotatably supported by bearings 24 and 25 with respect to the housing 21 inside the stator 22 fixed to the housing 21.

  The housing 21 has a cylindrical shape with both end surfaces closed as a whole. Specifically, the housing 21 includes a first housing constituent member (front side bracket) 26 and a second housing constituent member (rear side bracket) 27. The first housing component 26 includes a cylindrical main body portion 26a and a disk-shaped front plate 26b that closes one end opening of the main body portion 26a. The second housing component 27 has a cylindrical main body 27a and a disc-shaped rear plate 27b that closes one end opening of the main body 27a. The first housing component member 26 and the second housing component member 27 are formed of a metal material (for example, aluminum).

  The stator 22 is positioned between the enlarged diameter portion (flange portion) 26c of the other end opening of the first housing component 26 and the enlarged diameter portion (flange portion) 27c of the other end opening of the second housing component 27. In this state, the first housing component member 26 and the second housing component member 27 are connected and fixed using a plurality of connection bolts B1 (see FIGS. 2 and 3). Specifically, the bolt B <b> 1 is fastened in a state of passing through the mounting protrusion 34 provided on the outer peripheral portion of the first housing component 26 and the mounting protrusion 35 provided on the outer peripheral portion of the second housing component 27. .

  The end portions of the stator core 28 are fixed to the enlarged diameter portions 26c and 27c (see FIG. 1) of the housing constituent members 26 and 27, and the outer diameter surface of the stator core 28 is exposed. The stator 22 has a stator core 28 and a coil 29. The stator 22 is configured by winding a coil 29 around teeth (not shown) of a stator core 28 fixed to main body portions 26a, 27a of housing constituent members 26, 27. The coil end 29a protrudes from the output-side end face 28a of the stator core 28, and the coil end 29b protrudes from the counter-output-side end face 28b of the stator core 28. The stator core 28 is configured by laminating electromagnetic steel plates.

  A rotor 23 is disposed inside the stator 22. The rotor 23 has a shaft 30, a rotor core 31, and a secondary conductor 32. The shaft 30 is disposed at the center of the stator 22. The rotor core 31 is fixed to the shaft 30 inside the stator 22. The rotor core 31 is configured by laminating electromagnetic steel plates.

  The secondary conductor 32 has a rotor bar 32a and end rings 32b and 32c. The rotor bar 32a is embedded in the rotor core 31 and arranged so as to penetrate in the axial direction. The end ring 32b is disposed on one end surface of the rotor core 31, and the end ring 32b is connected to one end of the rotor bar 32a. The end ring 32c is disposed on the other end surface of the rotor core 31, and the end ring 32c is connected to the other end of the rotor bar 32a. The secondary conductor 32 (rotor bar 32a, end rings 32b, 32c) is made of aluminum, and in detail, is manufactured by aluminum die casting.

  In the rotating electrical machine 20, a rotor 23 is disposed in a housing 21, the output side of the shaft 30 protrudes from one surface (end surface) S1 of the housing 21, and the opposite output side of the shaft 30 is the other surface (end surface) S2 of the housing 21. Protruding from. Further, as shown in FIG. 3, the housing 21 has a plurality of mounting projections 33 on the outer peripheral portion, and the bolts B <b> 2 a can be screwed into the mounting projections 33.

  The inverter 50 for driving the rotating electrical machine 20 is disposed at a position separated from the other surface S <b> 2 on the axis O on the counter-output side of the shaft 30 outside the housing 21. The inverter 50 is attached to the heat sink 60. The four heat sinks 60 and the rectifying plate 90 are fixed to the housing 21 by screwing the four bolts B2a (see FIGS. 3 and 5) passing through the heat sink 60 and the rectifying plate 90 into the mounting protrusions 33 of the housing 21. Yes. Further, the cover 100 is fixed to the heat sink 60 by screwing four bolts B <b> 2 b (see FIGS. 3 and 5) penetrating the cover 100 into the heat sink 60. Each bolt B2a, B2b is screwed in from the axial direction of the shaft 30.

  The heat sink 60 is formed by aluminum die casting. The heat sink 60 has a heat radiating surface 60a through which airflow passes and a component arrangement surface 60b on which inverter components are arranged.

  As shown in FIGS. 1, 4, and 5, the heat sink 60 has a substantially disc-shaped main body 61, one surface being a heat radiating surface 60a and the other surface being a component placement surface 60b. As shown in FIG. 1, the main body 61 of the heat sink 60 extends in the radial direction orthogonal to the direction in which the shaft 30 extends, and is disposed to face the other surface S <b> 2 of the housing 21. On the other surface (60b) of the main body 61, as shown in FIG. 5, a substrate 51 and a switching element 52 as inverter components are arranged. Specifically, the substrate 51 is mounted on the other surface (60b) of the main body 61 via an insulating layer (not shown), and the switching element 52 is mounted on the substrate 51. A plurality of switching elements 52 constitute an upper arm and a lower arm of each phase of U, V, and W. Then, direct current from a direct current power source such as a vehicle-mounted battery is converted into alternating current by the switching operation of the switching elements constituting the upper arm and the lower arm, and supplied to each phase of the rotating electrical machine 20. Thereby, the rotary electric machine 20 is driven, the shaft 30 rotates, and the device connected to the output side of the shaft 30 is rotationally driven.

  As shown in FIG. 5, each substrate 51 on which the switching element 52 is mounted is disposed so as to surround the axis O on the opposite side of the shaft 30 in the main body 61 of the heat sink 60.

  As shown in FIGS. 1, 2, and 3, the heat sink 60 is disposed between the inverter 50 and the rotating electrical machine 20 on the axis O on the opposite side of the shaft 30 outside the housing 21. The substrate 51, the switching element 52, and the like disposed on the other surface (60b) of the main body 61 are covered with a cover 100. The cover 100 has a covered cylinder shape in which the cylinder portion 101 is closed by the lid portion 102. The cover 100 is arranged on the axis O on the opposite side of the shaft 30 and covers the substrate 51 and the switching element 52 as components arranged on the component arrangement surface 60 b of the heat sink 60.

  As shown in FIGS. 1, 2, and 3, fins 62 are provided on one surface (60 a) of the main body 61 of the heat sink 60. As shown in FIG. 4, the fin 62 includes a protrusion group 63 including a plurality of protrusions 63 a, a protrusion group 64 including a plurality of protrusions 64 a, and a protrusion group 65 including a plurality of protrusions 65 a, It has a ridge group 66 composed of a plurality of ridges 66a. In addition, the fin 62 includes a ridge group 67 including a plurality of ridges 67a, a ridge group 68 including a plurality of ridges 68a, a ridge group 69 including a plurality of ridges 69a, and a plurality of ridges 70a. A ridge group 70 is formed.

  In this manner, the heat sink 60 is disposed on the axis O on the opposite side of the shaft 30 outside the housing 21 from the cooling fan 80, and the heat radiating surface 60 a faces the cooling fan 80 and rotates the cooling fan 80. The accompanying air flow passes through the heat radiating surface 60a.

  As shown in FIGS. 1, 2, and 3, the cooling fan 80 is fixed on the counter-output side of the shaft 30 between the heat sink 60 and the rotating electrical machine 20 on the axis O on the counter-output side of the shaft 30 outside the housing 21. Has been. The cooling fan 80 can rotate with the rotation of the shaft 30 to suck air. That is, the cooling fan 80 rotates with the rotation of the rotor 23 to generate cooling air. Specifically, as the cooling fan 80 rotates, air is sent radially outward from the axis O side of the shaft 30 opposite to the output side.

The cooling fan 80 will be described in detail.
As shown in FIGS. 1, 2, and 3, the cooling fan 80 is formed by processing a plate material. The cooling fan 80 includes a blade portion 81, a fixing portion 82, and an extending portion 83. The fixing portion 82 which is a portion to be fixed to the shaft 30 has a disk shape (flange shape) and is fixed to the shaft 30. A cylindrical extending portion 83 extends in the axial direction from the outer peripheral end of the disk-shaped fixing portion 82. A blade portion 81 is formed at the other end of the cylindrical extending portion 83. The blade portion 81 includes a flat plate portion 81a and a curved portion 81b for receiving air. The flat plate portion 81a of the blade portion 81 extends in the radial direction orthogonal to the extending direction of the shaft 30, and a plurality of curved surface portions 81b are formed on the outer peripheral side of the flat plate portion 81a so as to be bent in the axial direction.

  Then, with the rotation of the cooling fan 80, air is sent to the radially outer side from the axis O side on the opposite side of the shaft 30 by the curved surface portion 81b. That is, as shown in FIG. 1, outside air can be introduced from the outer diameter side toward the axis O side on the opposite side of the shaft 30 in the space between the heat radiation surface 60 a of the heat sink 60 and the rectifying plate 90 and the rectifying plate 90. The holes 91, 92, 93, 94, and 95 can be discharged along the flat plate portion 81a of the cooling fan 80 to the outer diameter side.

  As shown in FIGS. 1, 2, and 3, the rectifying plate 90 is disposed between the heat sink 60 and the cooling fan 80 on the axis O on the side opposite to the output of the shaft 30 outside the housing 21. The rectifying plate 90 is made of a flat plate and has a substantially disc shape. The rectifying plate 90 extends in a radial direction orthogonal to the extending direction of the shaft 30, and has a square hole 95 at a site on the axis O on the opposite side of the shaft 30. Further, holes 91, 92, 93, 94 are provided around the hole 95 in the rectifying plate 90.

  In this way, the heat sink 60 is arranged in a direction facing the rotating electrical machine 20. Outside air sucked into the heat sink 60 from the radial direction is exhausted in the radial direction by a cooling fan 80 that rotates integrally with the rotor 23. Specifically, the air sucked with the rotation of the cooling fan 80 flows toward the axis O on the opposite side of the shaft 30 in the main body 61 of the heat sink 60 by the fins 62, and the air flows through the holes 91, It is guided to the cooling fan 80 through 92, 93, 94, 95 and discharged through the blade portion 81 of the cooling fan 80.

  As shown in FIGS. 1, 2, and 3, the inverter-integrated rotating electrical machine 10 includes a plurality of (three) lead wires 40, 41, and 42 extending in the axial direction of the shaft 30 from the upper portion of the second housing component member 27. , Bus bars 110, 111, 112, and terminals 120, 121, 122, 123, 124 provided on the inverter 50.

  The lead wires 40, 41, 42 are drawn from the rotary electric machine 20 and are used to electrically connect the rotary electric machine 20 and the inverter 50. Bus bars 110, 111, 112 have one end connected to lead wires 40, 41, 42 and the other end connected to terminals 120, 121, 122 of inverter 50.

  Lead wires 40, 41, 42 that are power lines of the rotating electrical machine 20 extend in the axial direction of the shaft 30 on the outer peripheral side of the heat sink 60, the cooling fan 80, and the rectifying plate 90, and connect the rotating electrical machine 20 and the inverter 50. It is out. The lead line 40 is a U-phase lead line, the lead line 41 is a V-phase lead line, and the lead line 42 is a W-phase lead line. Leader wires (codes) 40 to 42 extend from the coil 29 and extend to the outside through the second housing component 27 while being sealed by the grommet 43. Each lead line 40, 41, 42 has crimp terminals 40a, 41a, 42a. The three lead wires 40, 41, and 42 are juxtaposed with each other in the horizontal direction, and air enters the gaps (gap) between the lead wires 40, 41, and 42 that are arranged apart from each other. Can pass through.

As described above, the lead lines 40, 41, and 42 extend from the rotating electrical machine 20 so as to straddle the outer periphery of the cooling fan 80 and the heat sink 60.
On the substrate 51 of the inverter 50, a U-phase output terminal 120, a V-phase output terminal 121, a W-phase output terminal 122, a positive input terminal 123, and a negative input terminal 124 are erected. Yes. Each of the terminals 120 to 124 has a cylindrical shape and extends in the axial direction of the shaft 30. The terminals 120 to 124 pass through the lid portion 102 of the cover 100, and the terminals 120 to 124 and the lid portion 102 are sealed with an O-ring 140 as a sealing material. Then, the tips of the terminals 120 to 124 are exposed to the outside of the cover 100 from the lid portion 102 of the cover 100. A screw hole 125 is formed in each of the terminals 120 to 124. Each screw hole 125 extends in the axial direction of the terminals 120 to 124, and opens at the front end surfaces of the terminals 120 to 124.

The terminals of the DC power supply line are screwed to the tip of the positive electrode terminal 123 and the negative electrode terminal 124.
A terminal block 44 for connecting the lead wires 40, 41, 42 and one end of the bus bars 110, 111, 112 is provided on the tube portion 101 of the cover 100. The upper surface of the terminal block 44 extends in the horizontal direction and is a flat surface. A nut N <b> 1 is embedded in the terminal block 44. The lead wires 40, 41, 42 are electrically connected to the corresponding bus bars 110, 111, 112 by bolts B3 screwed into the nut N1 through the crimp terminals 40a, 41a, 42a. Specifically, in the terminal block 44, the lead wires 40, 41, and 42 (crimp terminals 40a, 41a, and 42a) are disposed on the bus bars 110, 111, and 112, and are screw-fastened.

  The bus bars 110, 111, and 112 have a shape bent from the terminal block 44 toward the tips of the terminals 120, 121, and 122 along the outer surface of the cover 100. Specifically, the bus bars 110, 111, and 112 extend from the terminal block 44 in the axial direction of the shaft 30, and extend downward along the lid portion 102 from the front ends thereof. The bus bars 110, 111, and 112 are screwed into the screw holes 125 of the terminals 120 to 122 by bolts B4 at the other ends of the bus bars 110, 111, and 112. Accordingly, the other end portions of the bus bars 110, 111, and 112 are screwed to the tips of the terminals 120, 121, and 122. The bolt B4 is screwed in from the axial direction of the shaft 30. Further, in each of the bus bars 110, 111, and 112, a circular arc portion 115 that protrudes outward is formed at a portion bent by 90 degrees, and the tolerance when the both ends of the bus bars 110 to 112 are fixed by the circular arc portion 115 is absorbed. Be able to. Specifically, the arc portion 115 is convex outward in the radial direction.

  As shown in FIG. 1, the cover 100 and the terminal block 44 are integrally formed. The cover 100 and the heat sink 60 are sealed with an O-ring 130 as a first seal material. The O-ring 130 has an annular shape. Further, as described above, the lid portion 102 of the cover 100 and the terminals 120, 121, 122, 123, and 124 are sealed by the O-ring 140 as the second seal material, and the O-ring 140 has an annular shape. ing. In this way, the inverter 50 is hermetically sealed.

  Further, the fastening direction of the cover 100 with respect to the heat sink 60 and the fastening direction of the bus bars 110, 111, 112 with respect to the terminals 120, 121, 122 are the same direction, specifically, both are the axial direction of the shaft 30.

Next, the operation of the inverter-integrated rotating electrical machine 10 configured as described above will be described.
When the coil 29 is energized by the inverter 50, a rotating magnetic field is created in the stator 22. When the rotating magnetic field is generated, the rotor 23 rotates. With this rotation, the cooling fan 80 also rotates. As the cooling fan 80 rotates, air (outside air) is introduced from the radially outer side toward the axis O side on the opposite side of the shaft 30 and is discharged through the blades 81. The heat generated in the inverter 50 by this air is discharged through the heat sink 60.

  A plurality of lead wires 40, 41, 42 connecting the rotating electrical machine 20 and the inverter 50 are extended in the axial direction of the shaft 30 on the outer peripheral side of the heat sink 60, the cooling fan 80, and the rectifying plate 90. , W can be electrically connected to the rotary electric machine 20 and the inverter 50 by the lead lines 40, 41, 42 of each phase. In addition, a lead wire terminal block 44 is provided on the cylindrical portion 101 which is the side surface of the cover 100, and the rotating electric machine is connected to the lead wires 40, 41, 42 of each phase of U, V, W using the terminal block 44. 20 and the inverter 50 can be easily electrically connected.

  Further, as shown in FIG. 1, the air before passing through the holes 91 to 95 of the rectifying plate 90 accompanying the rotation of the cooling fan 80 flows to the lead lines 40, 41, 42, and the rectification accompanying the rotation of the cooling fan 80. The air after passing through the holes 91 to 95 of the plate 90 flows to the lead lines 40, 41 and 42. As a result, a plurality of lead wires (lead wires of U, V, and W phases) 40, 41, and 42 connecting the rotary electric machine 20 and the inverter 50 are cooled.

  In this way, the lead wires 40, 41, 42 of the rotating electrical machine (motor) 20 are connected to the inverter 50 via the bus bars 110, 111, 112 using the terminal block 44 provided on the cover 100. Thus, the size can be reduced as compared with the case where the terminal block is separately arranged. In addition, the lead wires 40, 41, and 42 and the bus bars 110, 111, and 112 are screwed to each other at the terminal block 44, so that the rotating electrical machine (motor) 20 and the inverter 50 are separably connected, and the inverter 50 is removed and repaired. And maintainability such as replacing the inverter 50 is ensured. Further, rod-shaped terminals 120, 121, and 122 are erected on the substrate 51 and extend in the axial direction of the shaft 30 (fastening direction of the cover 100), so that the inverter 50 can be easily sealed.

explain in detail.
FIG. 6 shows a comparative example in which a bus bar 200 that is an inverter terminal extends from a substrate 51 in the radial direction of the rotating electrical machine (motor) 20 and is connected to lead wires 40, 41, and 42 at a terminal block 44. Further, the terminal block 44 is sealed with the sealing material 201 and the cover 100 is sealed with the sealing material 202. When the bus bar 200 and the lead wires 40, 41, 42 of the rotating electrical machine 20 are connected in this way, the bus bar 200 as an inverter terminal is provided in a direction perpendicular to the axial direction of the shaft 30 (fastening direction of the cover 100). Therefore, it is difficult to seal the cover 100, resulting in an increase in cost.

  In the present embodiment, a lead wire terminal block 44 is provided on the cylindrical portion 101 which is the side surface of the cover 100, and a nut N <b> 1 is insert-molded on the terminal block 44. In this terminal block 44, lead wires 40, 41, 42 of the rotating electrical machine (motor) 20 are fastened to one end portions of the bus bars 110, 111, 112, and the other end portions of the bus bars 110, 111, 112 are terminals 120, 121, 122. Connected. At this time, the bus bars 110, 111, and 112 are arranged along the cover 100. The other ends of the bus bars 110, 111, and 112 are screwed to the terminals 120, 121, and 122 in the axial direction of the shaft 30 (the direction in which the cover 100 is fastened).

  In this way, the terminal block 44 for fastening the lead wires 40, 41, 42 of the rotating electrical machine (motor) 20 is formed integrally with the cover 100 on the cylindrical portion 101 that is the side surface of the cover 100, and the terminals 120, 121, 122 are formed. Are fastened in the fastening axis direction of the cover 100. Therefore, it is possible to provide the inverter-integrated dynamoelectric machine 10 that is easy to seal the inverter 50 and has good maintainability without separately manufacturing the terminal block 44.

According to the above embodiment, the following effects can be obtained.
(1) In the inverter-integrated rotating electrical machine 10, the rotor 23 is disposed in the housing 21, the output side of the shaft 30 protrudes from one surface S1 of the housing 21, and the non-output side of the shaft 30 is the other surface S2 of the housing 21. A rotating electrical machine 20 projecting from the In addition, a cooling fan 80 that is fixed to the opposite side of the shaft 30 outside the housing 21 and rotates as the shaft 30 rotates is provided. Further, the cooling fan 80 is disposed on the opposite side of the shaft 30 outside the housing 21 from the cooling fan 80, and the heat radiation surface 60 a faces the cooling fan 80, and the air flow generated by the rotation of the cooling fan 80 causes the heat radiation surface 60 a. A heat sink 60 is provided. Furthermore, a substrate 51 and a switching element 52 as components are arranged on the component arrangement surface 60 b of the heat sink 60, and an inverter 50 for driving the rotating electrical machine 20 is provided. Further, the cylindrical portion 101 is formed in a covered cylindrical shape closed by the lid portion 102, and is disposed on the opposite output side of the shaft 30, and the substrate 51 and the switching element 52 as components disposed on the component placement surface 60 b of the heat sink 60. The cover 100 which covers is provided. The lead wires 40, 41, and 42 are drawn from the rotary electric machine 20 and electrically connect the rotary electric machine 20 and the inverter 50. One end portion is connected to the lead wires 40, 41, and 42, and the other end portion is connected. Bus bars 110, 111, 112 connected to terminals 120, 121, 122 of the inverter 50. The lead lines 40, 41, and 42 extend from the rotating electrical machine 20 so as to straddle the outer periphery of the cooling fan 80 and the heat sink 60. The tips of the terminals 120, 121, and 122 are exposed to the outside of the cover 100 from the lid portion 102 of the cover 100. A terminal block 44 for connecting the lead wires 40, 41, 42 and one end of the bus bars 110, 111, 112 is provided on the tube portion 101 of the cover 100. The bus bars 110, 111, and 112 have shapes bent from the terminal block 44 toward the tips of the terminals 120, 121, and 122.

  Thereby, in the inverter-integrated rotary electric machine in which the inverter 50, the heat sink 60, and the cooling fan 80 are arranged on the non-output side of the rotary electric machine 20, wiring for electrically connecting the rotary electric machine 20 and the inverter 50 can be easily performed. It can be carried out.

(2) Since the cover 100 and the terminal block 44 are integrally formed, the size can be reduced and the sealing performance of the inverter 50 is excellent.
(3) An O-ring 130 serving as a first sealing material that seals between the cover 100 and the heat sink 60, and an O-ring 140 serving as a second sealing material that seals between the lid 102 and the terminals 120, 121, and 122. Therefore, the sealing performance of the inverter 50 is excellent.

  (4) Since the fastening direction of the cover 100 with respect to the heat sink 60 and the fastening direction of the bus bars 110, 111, 112 with respect to the terminals 120, 121, 122 are the same direction, the cover 100 and the bus bars 110, 111, 112 are easily fastened.

The embodiment is not limited to the above, and may be embodied as follows, for example.
-Although the bus bar used was a rectangular strip with a rectangular cross section, it is not limited to this. For example, the bus bar may be a conductor having a circular cross section.

  -The lead wire 40, 41, 42 and one end of the bus bar 110, 111, 112 are screw-fastened with the terminal block 44, and the other end of the bus bar 110, 111, 112 and the terminal 120, 121, 122 are screw-fastened. However, it is not limited to this. For example, the other end portions of the bus bars 110, 111, and 112 and the terminals 120, 121, and 122 may be soldered, and in this case, maintenance is excellent.

  In the terminal block 44, the lead wires 40, 41, 42 (crimp terminals 40a, 41a, 42a) are arranged on the bus bars 110, 111, 112, but the lead wires 40, 41, 42 (crimp terminals 40a, 41a, 42a). The bus bars 110, 111, and 112 may be disposed on the top.

  -Although the whole area | region of the bus-bars 110, 111, and 112 was arrange | positioned along the cover 100, it is not restricted to this. For example, part of the bus bars 110, 111, and 112 may be insert-molded in the cover 100.

  -Although the circular arc part 115 was formed in the bus bars 110, 111, and 112, it is not restricted to this. The arc portion 115 may not be formed. Further, the arc portion 115 may be formed so as to protrude outward in the axial direction.

  The heat sink 60 is disposed on the axis O on the opposite side of the shaft 30 outside the housing 21. However, the heat sink 60 is not limited to this, and may be disposed on the opposite side of the shaft 30 outside the housing 21. Good.

Although the cover 100 is disposed on the axis O on the opposite side of the shaft 30, the cover 100 may be disposed on the opposite side of the shaft 30 without being limited to this.
・ The type of rotating electrical machine (motor) is not limited. That is, it may not be an induction motor. For example, a rotating electric machine with a permanent magnet may be used.

Although the rectifying member is a plate, the rectifying member may not be a plate.
The rotary electric machine is not limited to a sealed type, and may be applied to an open type rotary electric machine.

  DESCRIPTION OF SYMBOLS 10 ... Inverter integrated rotary electric machine, 20 ... Rotary electric machine, 21 ... Housing, 23 ... Rotor, 30 ... Shaft, 40 ... Leader, 41 ... Leader, 42 ... Leader, 44 ... Terminal block, 50 ... Inverter, 51 DESCRIPTION OF SYMBOLS ... Board | substrate 52 ... Switching element 60 ... Heat sink 60a ... Radiation surface 60b ... Component arrangement surface 80 ... Cooling fan 100 ... Cover 101 ... Tube part 102 ... Cover part 110 ... Bus bar 111 ... Bus bar 112 ... bus bar, 120 ... terminal, 121 ... terminal, 122 ... terminal, 130 ... O-ring, 140 ... O-ring, S1 ... surface, S2 ... surface.

Claims (4)

A rotating electrical machine in which a rotor is disposed in the housing, and an output side of the shaft protrudes from one surface of the housing and a counter-output side of the shaft protrudes from the other surface of the housing;
A cooling fan that is fixed to the non-output side of the shaft outside the housing and rotates as the shaft rotates;
A heat sink that is disposed outside the housing on the side opposite to the output side of the shaft and spaced apart from the cooling fan, the heat dissipation surface facing the cooling fan, and an air flow generated by rotation of the cooling fan passes through the heat dissipation surface. When,
Components are arranged on the component arrangement surface in the heat sink, and an inverter for driving the rotating electrical machine,
A cylindrical part is covered with a lid part, and the cover is disposed on the output side of the shaft and covers the component disposed on the component placement surface of the heat sink;
Inverter-integrated rotary electric machine with
A lead wire that is drawn from the rotating electrical machine and electrically connects the rotating electrical machine and the inverter;
A bus bar having one end connected to the lead wire and the other end connected to a terminal of the inverter;
Have
The lead wire extends from the rotating electrical machine so as to straddle the outer periphery of the cooling fan and the heat sink,
The tip of the terminal is exposed to the outside of the cover from the cover lid,
A terminal block for connecting the lead wire and one end of the bus bar to the cylindrical portion of the cover;
The inverter-integrated dynamoelectric machine, wherein the bus bar has a shape bent from the terminal block toward a tip of the terminal.   The inverter-integrated dynamoelectric machine according to claim 1, wherein the cover and the terminal block are integrally formed.   The inverter according to claim 1, further comprising: a first sealing material that seals between the cover and the heat sink; and a second sealing material that seals between the lid and the terminal. Integrated rotating electric machine.   The inverter-integrated rotating electrical machine according to any one of claims 1 to 3, wherein a fastening direction of the cover with respect to the heat sink and a fastening direction of the bus bar with respect to the terminal are the same direction.

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