JP6079452B2 - Inverter-integrated rotating electrical machine - Google Patents

Description

  The present invention relates to an inverter-integrated rotating electrical machine including a rotating electrical machine and an inverter device attached to the rotating electrical machine.

  Patent Document 1 describes a vehicular rotating electrical machine device in which an inverter unit and a rotating electrical machine are integrated. In the rotating electrical machine apparatus for a vehicle described in Patent Document 1, when the cooling fan is rotated along with the rotation of the rotor of the rotating electrical machine, cooling air is sucked from the intake holes provided on the outer periphery of the cover of the inverter unit. The The sucked cooling air flows along the radiating fins of the inverter unit, is sucked into the rotating electrical machine side, is bent in the centrifugal direction by the cooling fan, and is discharged from the exhaust hole provided on the outer periphery of the rear bracket of the rotating electrical machine. Is done.

JP 2005-253184 A

  In the rotating electrical machine apparatus for a vehicle described in Patent Literature 1, a high temperature discharged from the exhaust port is provided by providing a partition wall between the intake port of the inverter unit cover and the exhaust hole of the rear bracket of the rotary electrical machine. This prevents the exhaust cooling air from circulating to the intake port and achieves efficient cooling with the inverter unit. However, in the rotating electrical machine apparatus for a vehicle described in Patent Document 1, since the partition wall protruding outward is provided with respect to the cover of the inverter unit, the inverter unit becomes larger in the radial direction by the amount of the partition wall. Therefore, there is a possibility that downsizing of the entire apparatus may be hindered.

  Then, an object of this invention is to provide the inverter integrated rotary electric machine which can be cooled efficiently, without enlarging an inverter apparatus.

  In order to solve the above problems, an inverter-integrated rotating electrical machine according to the present invention internally defines a rotating shaft, a cooling fan that rotates as the rotating shaft rotates, and a housing space that houses the cooling fan. A rotating electrical machine having a housing and an inverter device attached to the rotating electrical machine so that the heat radiating member is disposed on the housing, and a first opening is provided on a side surface of the rotating electrical machine. A second opening is formed on the side surface of the inverter device, and a first opening for communicating the first opening and the second opening is formed on the surface of the housing facing the inverter device. 3 is formed, and the inverter device has a heat radiating fin extending from the second opening toward the third opening. The first opening and the second opening have a rotation axis. Seeing from each other It is disposed in a position, characterized in that.

  In the inverter-integrated rotating electrical machine according to the present invention, the inverter device is attached to the rotating electrical machine so that the heat dissipation member of the inverter device is disposed on the housing of the rotating electrical machine. Moreover, the 1st opening is formed in the side surface of a rotary electric machine, and the 2nd opening is formed in the side surface of an inverter apparatus. A third opening for communicating the first opening and the second opening is formed in a surface of the housing of the rotating electrical machine that faces the inverter device. For this reason, the accommodation space in which the cooling fan is accommodated communicates with the first opening and the second opening via the third opening. Therefore, when the cooling fan rotates in the accommodation space, for example, a refrigerant such as air is sucked from the second opening and introduced into the accommodation space through the third opening. For example, the refrigerant introduced into the accommodation space is discharged from the first opening with the rotation of the cooling fan. With such a refrigerant flow, each element of the inverter device is cooled via the heat radiating member and the heat radiating fins. In particular, in the inverter-integrated rotating electrical machine according to the present invention, the first opening and the second opening are formed at different positions as viewed from the direction along the rotating shaft of the rotating electrical machine. For this reason, for example, the refrigerant discharged from the first opening is suppressed from being sucked again from the second opening. That is, the recirculation of the refrigerant is suppressed. Therefore, the inverter device can be efficiently cooled without increasing the size of the inverter device.

  In the inverter-integrated rotating electrical machine according to the present invention, the first opening is an outlet for discharging the refrigerant from the accommodation space according to the rotation of the cooling fan, and the second opening is the cooling fan. A suction port for sucking the refrigerant into the accommodation space through the third opening according to the rotation, and a fixing portion for fixing the rotary electric machine and the inverter device to each other on the side surfaces of the rotary electric machine and the inverter device And the fixing portion is provided at least at a position between the first opening and the second opening and adjacent to the first opening in the rotation direction of the cooling fan. Can be. In this case, the refrigerant discharged from the first opening along the rotation direction of the cooling fan can be prevented from going directly to the second opening. Therefore, the recirculation | reflux of a refrigerant | coolant can be suppressed reliably and an inverter apparatus can be cooled more efficiently.

  In the inverter-integrated rotating electrical machine according to the present invention, the inverter device has a substantially circular outer shape and includes a plurality of power modules and a plurality of capacitors, and the power modules and the capacitors are arranged in the circumferential direction of the inverter device. The heat radiation fins are formed at portions corresponding to the power module mounting portion of the heat radiation member, and the first opening is at a position facing the capacitor in the housing. It may be formed. In this case, it is possible to suppress electrical and thermal imbalance in the inverter device. Moreover, the power module which is a heat generating member can be cooled effectively.

  In the inverter-integrated dynamoelectric machine according to the present invention, the heat radiating fins are formed in the plurality of first heat radiating fins formed in the second opening side region of the heat radiating member and in the third opening side region of the heat radiating member. The formation density of the 1st radiation fin can be made into a thing smaller than the formation density of the 2nd radiation fin. In this case, it is possible to suppress the pressure loss of the refrigerant from occurring in the region on the second opening side.

  ADVANTAGE OF THE INVENTION According to this invention, the inverter integrated rotary electric machine which can cool an inverter apparatus efficiently can be provided.

It is a perspective view of the inverter integrated rotating electrical machine according to the present embodiment. It is a typical fragmentary sectional view along the II-II line of FIG. It is a top view of the housing shown by FIGS. It is a schematic diagram of the inverter apparatus shown by FIG. FIG. 2 is a plan view of the inverter-integrated rotating electrical machine shown in FIG. 1.

  Hereinafter, an inverter-integrated rotating electrical machine according to an embodiment of the present invention will be described in detail with reference to the drawings. In each figure, the same elements or corresponding elements are denoted by the same reference numerals, and redundant description is omitted. Also, the dimensional ratios in each figure may be different from the actual ones.

  FIG. 1 is a perspective view of an inverter-integrated rotating electrical machine according to the present embodiment. As shown in FIG. 1, the inverter-integrated rotating electrical machine 100 includes a rotating electrical machine 1 and an inverter device 2. The inverter-integrated dynamoelectric machine 100 has a cylindrical shape as a whole. The rotating electrical machine 1 is, for example, a three-phase motor, and the inverter device 2 is, for example, a three-phase inverter that drives a three-phase motor. The rotating electrical machine 1 and the inverter device 2 are integrated and electrically connected to each other.

  FIG. 2 is a schematic partial cross-sectional view taken along the line II-II in FIG. 1 (and FIG. 5). FIG. 3 is a plan view of the housing shown in FIGS. As shown in FIGS. 1 to 3, the rotating electrical machine 1 includes a rotating shaft 10, a fan 11, and a housing 12. The fan (cooling fan) 11 is attached to one end portion 10 a of the rotary shaft 10 and rotates with the rotation of the rotary shaft 10. In each figure, a direction A1 indicates the extending direction of the rotating shaft 10, and a direction A2 indicates the rotating direction of the rotating shaft 10 and the fan 11. The rotating electrical machine 1 further includes elements (not shown) such as a rotor and a stator that rotate with the rotation of the rotating shaft 10 in order to cause a function as a rotating electrical machine.

  The housing 12 forms one end 1a of the rotating electrical machine 1 in the direction A1. The housing 12 includes an upper wall portion 13 and a side wall portion 14. The upper wall portion 13 has a disc shape and extends along a direction intersecting the direction A1. The side wall portion 14 has a cylindrical shape and extends from the upper wall portion 13 along the direction A1. The housing 12 defines a space (accommodating space) S inside by the upper wall portion 13 and the side wall portion 14. One end portion 10 a of the rotating shaft 10 and the fan 11 are accommodated in the space S.

  A plurality of (here, three) openings (third openings) 15 are formed in the upper wall portion 13. The openings 15 are arranged at substantially equal intervals along the circumferential direction (direction A2) of the upper wall portion 13. A plurality (three in this case) of openings (first openings) 16 are formed in the upper wall portion 13 and the side wall portion 14. The opening 16 is formed in a connection portion between the upper wall portion 13 and the side wall portion 14. The openings 16 are formed at substantially equal intervals along the direction A2.

  That is, an opening 15 is formed in the upper surface 12a of the housing 12 (surface facing the inverter device 2) extending in the direction intersecting the direction A1, and the side surface (rotation) of the housing 12 extending along the direction A1. An opening 16 is formed in the side surface 12b (and part of the upper surface 12a) of the electric machine. The space S inside the housing 12 is opened upward and laterally at the opening 15 and the opening 16. The lower end portion of the housing 12 is fixed to the body portion 1A of the rotating electrical machine 1.

  On the side surface 12b (side wall portion 14) of the housing 12, a plurality (three in this case) of fixing portions 17 for fixing the rotating electrical machine 1 and the inverter device 2 to each other project. The fixing portions 17 are formed so as to be adjacent to the opening 16 in the direction A2.

  FIG. 4 is a schematic diagram of the inverter device shown in FIGS. In particular, FIG. 4A is a schematic plan view of the inverter device, and FIG. 4B is a bottom view of the inverter device. In FIG. 4A, the power module and the capacitor are shown through the cover and the capacitor substrate. As shown in FIGS. 1, 2, and 4, the inverter device 2 has a substantially circular outer shape when viewed from the direction A1. The inverter device 2 includes a plurality (here, three) of power modules 20, a capacitor substrate 30, a plurality of capacitors 40, a heat sink (heat dissipating member) 50, a plurality of heat dissipating fins 60, and a cover 70. ing.

  Each of the power modules 20 includes a main circuit board 21 and a plurality (eight in this case) of power elements 22. The power element 22 is mounted on the surface 21 a of the main circuit board 21. The power element 22 constitutes, for example, an upper arm or a lower arm in each phase of the three-phase inverter with four elements as one set. The four power elements 22 constituting each arm are arranged in a line on the surface 21a. As the power element 22, for example, a MOSFET, an IGBT, or the like can be used.

  The capacitor substrate 30 is disposed so as to face the main circuit board 21 so that the surface 30 a faces the surface 21 a of the main circuit board 21. The outer shape of the capacitor substrate 30 is substantially circular. An opening 30 h is formed in the approximate center of the capacitor substrate 30. The capacitor 40 is mounted on the surface 30 a of the capacitor substrate 30.

  A plurality of capacitors (here, six capacitors) are used as one set, and the sets are arranged on the surface 30a of the capacitor substrate 30 such that each set is substantially equally spaced along the circumferential direction (direction A2) of the capacitor substrate 30. Are distributed. Here, three sets of capacitors 40 are equally arranged on the surface 30 a of the capacitor substrate 30.

  On the other hand, the power modules 20 are respectively disposed between sets of capacitors 40 adjacent to each other along the direction A2. Therefore, the power modules 20 are also distributed and arranged on the surface 30a of the capacitor substrate 30 so as to be substantially equidistant from each other along the direction A2. Here, three power modules 20 are equally arranged on the surface 30 a of the capacitor substrate 30. The plurality of power elements 22 constituting each arm are arranged along a direction intersecting the radial direction of the capacitor substrate 30. Therefore, the power module 20 and the capacitor 40 are alternately arranged at substantially equal intervals along the circumferential direction (direction A2) of the inverter device 2.

  The heat sink 50 has substantially the same outer shape (that is, a substantially circular outer shape) as the outer shape of the capacitor substrate 30. The heat sink 50 includes a main body 51 that contacts the back surface 21 b of the main circuit board 21 and a cover 52 that extends from the main body 51 so as to cover the capacitor 40. The heat sink 50 is thermally connected to the back surface 21 b of the main circuit board 21 at least in the main body 51. Note that the heat sink 50 may be thermally connected to the capacitor 40 by bringing the capacitor 40 and the cover portion 52 into direct contact with each other or through contact with a heat transfer member such as a heat radiating sheet.

  As described above, the set of capacitors 40 is disposed on the capacitor substrate 30 at substantially equal intervals along the direction A2, and therefore the cover portion 52 of the heat sink 50 covering the capacitor 40 is also along the direction A2. The heat sinks 50 are formed at substantially equal intervals. Therefore, openings (second openings) 53 are formed between the cover portions 52 arranged at substantially equal intervals along the direction A2 on the side surface 50s (side surface of the inverter device 2) 50s of the heat sink 50 along the direction A1. Has been. In this embodiment, three openings 53 are formed by the three cover portions 52. The heat sink 50 can be formed of a metal such as aluminum.

  A plurality (three in this case) of fixing portions 57 for fixing the rotating electrical machine 1 and the inverter device 2 to each other are projected from the side surface 50 s of the heat sink 50. The fixing portion 57 is formed so as to be adjacent to the opening 53 of the heat sink 50 in the direction opposite to the direction A2. As will be described later, the fixing unit 17 on the rotating electrical machine 1 side and the fixing unit 57 on the inverter device 2 side are arranged so as to be continuous along the direction A1. Accordingly, the fixing portions 17 and 57 are provided at positions between the opening 16 and the opening 53 and adjacent to the opening 16 in the direction A2.

  The radiating fin 60 is erected on the back surface 51 b so as to protrude from the back surface 51 b of the main body 51 of the heat sink 50. Therefore, the heat radiation fin 60 is thermally connected to the back surface 21 b of the main circuit board 21 through the main body 51 of the heat sink 50. The radiation fins 60 extend radially in the direction from the outer edge of the heat sink 50 toward the center along the back surface 51b of the main body 51 (that is, along the back surface 21b of the main circuit board 21). Since the power module 20 is mounted on the main body 51 of the heat sink 50, the heat radiating fins 60 are formed in portions corresponding to the mounting portions of the power module 20 in the heat sink 50.

  The radiating fin 60 includes a plurality of radiating fins 61 (first radiating fins) formed on the outer edge side of the heat sink 50, and a plurality of radiating fins (second radiating fins) 62 formed on the center side of the heat sink 50. including. The formation density of the radiation fins 61 is smaller than the formation density of the radiation fins 62. Therefore, the interval between the adjacent radiating fins 61 is wider than the interval between the adjacent radiating fins 62. Further, the angle formed between the radial direction of the heat sink 50 and the extending direction of the radiating fins 61 is larger than the angle formed between the radial direction of the heat sink 50 and the extending direction of the radiating fins 62.

  As described above, the radiating fin 60 extends from the outer edge of the heat sink 50 toward the center. On the other hand, the plurality of power elements 22 constituting each arm are arranged in a direction crossing the radial direction of the capacitor substrate 30 (that is, the direction from the outer edge of the heat sink 50 toward the center). The heat dissipating fins 60 as described above can be integrally formed with the heat sink 50 by using a metal such as aluminum.

  The cover 70 is disposed so as to cover the power module 20, the capacitor substrate 30, and the capacitor 40, and is fixed to the outer edge portion of the heat sink 50 at the outer edge portion thereof. Note that the fixing portion 57 may be used to fix the cover 70.

  The inverter device 2 as described above is attached to one end 1a of the rotating electrical machine 1 so that the heat sink 50 is disposed on the housing 12 of the rotating electrical machine 1 along the direction A1. The rotating electrical machine 1 and the inverter device 2 are fixed by a fixing portion 17 and a fixing portion 57 that are arranged so as to be continuous with each other along the direction A1. The fixing portions 17 and 57 are wall portions that extend along the direction A1 when the rotary electric machine 1 and the inverter device 2 are fixed to each other.

  Thus, by fixing the rotary electric machine 1 and the inverter device 2 to each other, the bottom surface of the heat sink 50 (the back surface 51b of the main body 51) and the top surface 12a of the housing 12 face each other. Therefore, a communication path P is formed between the heat sink 50 and the housing 12 so that the opening 53 of the heat sink 50 and the space S inside the housing 12 communicate with each other through the opening 15 of the housing 12. That is, the opening 15 is for communicating the opening 16 and the opening 53 through the space S and the communication path P.

  The communication path P is formed by the back surface 51b of the main body 51 of the heat sink 50, the cover 52 adjacent to each other along the direction A2, and the upper surface 12a of the housing 12. Therefore, the radiation fins (radiation fins 61 and 62) 60 formed on the back surface 51 b of the main body 51 are arranged in the communication path P and extend along the communication path P. In particular, the heat radiation fin 60 extends from the opening 53 toward the opening 15 (see FIG. 5).

  Further, the inverter device 2 is attached to the rotating electrical machine 1 such that the opening 53 of the heat sink 50 and the opening 16 of the housing 12 are arranged at different positions as viewed from the direction A1. Here, the openings 53 of the heat sink 50 and the pair of openings 16 of the housing 12 are alternately arranged along the direction A2. Thereby, the opening 16 is formed at a position facing the capacitor 20 in the housing 12 (position facing the cover portion 52 of the heat sink 50). Note that the opening 16 and the opening 53 being arranged at positions different from each other in the direction A1 means that the center position of the opening 16 and the center position of the opening 53 are different from each other in the direction A1. This includes a case where the opening 16 and the opening 53 partially overlap when viewed from the viewpoint. The openings 16 and 53 only need to have different center positions within a range in which the recirculation of the refrigerant M can be suppressed as will be described later.

  Subsequently, operations and effects of the inverter-integrated rotating electrical machine 100 according to the present embodiment will be described. FIG. 5 is a plan view of the inverter-integrated rotating electrical machine illustrated in FIG. 1, and is a diagram for explaining the flow of refrigerant in the inverter-integrated rotating electrical machine. In the inverter-integrated rotating electrical machine 100, as shown in FIGS. 2 and 5, when the fan 11 rotates with the rotating shaft 10 in the space S of the housing 12, the refrigerant M such as air is sucked from the opening 53 of the heat sink 50. Then, it passes through the communication path P and is introduced into the space S through the opening 15 of the housing 12. Further, the refrigerant M introduced into the space S is discharged from the opening 16 of the housing 12 as the fan 11 rotates.

  Therefore, in the inverter-integrated dynamoelectric machine 100, the opening 16 of the housing 12 functions as a discharge port for discharging the refrigerant M from the space S according to the rotation of the fan 11, and the opening 53 of the heat sink 50 corresponds to the fan 11. In response to the rotation of, it functions as a suction port for sucking the refrigerant M into the space S through the opening 15. With such a flow of the refrigerant M, the heat sink 50, the heat radiation fin 60, and each element (for example, the power module 20) of the inverter device 2 thermally connected to the heat sink 50 are cooled.

  In particular, in the inverter-integrated rotating electrical machine 100, the opening 16 of the housing 12 and the opening 53 of the heat sink 50 are arranged so as to be different from each other when viewed from the direction A1. Therefore, the relatively high-temperature refrigerant M discharged from the opening 16 of the housing 12 through the communication path P is suppressed from being sucked again from the opening 53 of the heat sink 50. That is, the circulation of the refrigerant M is suppressed without providing a partition wall or the like on the cover 70 or the like of the inverter device 2 as in the prior art. Therefore, according to the inverter-integrated rotating electrical machine 100, the inverter device 2 can be efficiently cooled without increasing the size of the inverter device 2.

  Here, as shown in FIG. 5, the refrigerant M discharged according to the rotation of the fan 11 is discharged from the opening 16 of the housing 12 following the rotation of the fan 11. On the other hand, a fixing portion 17 is formed in the housing 12 at a position adjacent to the opening 16 in the rotation direction A2 of the fan 11. Therefore, the flow F of the refrigerant M discharged from the opening 16 following the rotation of the fan 11 is bent in a direction intersecting the rotation direction A2 of the fan 11 by the fixing portion 17. Therefore, the refrigerant M discharged from the opening 16 of the housing 12 is suppressed from going directly to the opening 53 of the heat sink 50. That is, the fixing portion 17 functions as a wall portion for suppressing the recirculation of the refrigerant M. Thereby, the inverter apparatus 2 can be cooled more efficiently.

  In particular, in the inverter-integrated rotating electrical machine 100, the fixing portion 57 is formed on the side surface 50s of the heat sink 50 so as to be adjacent to the opening 53 of the heat sink 50 in the direction opposite to the rotation direction A2 of the fan 11. The fixing portion 57 is arranged so as to be continuous with the fixing portion 17 on the rotating electrical machine 1 side along the direction A1. Accordingly, the fixing portion 57 also functions as a wall portion for suppressing the recirculation of the refrigerant M. For this reason, the recirculation | reflux of the refrigerant | coolant M can be suppressed more reliably.

  Further, in the inverter-integrated rotating electrical machine 100, the fixing portions 17 and 57 for fixing (fastening) the rotating electrical machine 1 and the inverter device 2 are used as the wall portions for suppressing the recirculation of the refrigerant M as described above. ing. For this reason, compared with the case where such a wall part is comprised as another member, a number of parts can be reduced.

  In the inverter-integrated dynamoelectric machine 100, the inverter device 2 is connected to the radiation fins 61 formed on the heat sink 50 so as to extend along the communication path P in the region on the opening 53 side of the communication path P. And a radiation fin 62 formed on the heat sink 50 so as to extend along the communication path P in an area on the space S side of the path P (area on the opening 15 side). Therefore, the inverter device 2 can be effectively cooled by using these heat radiation fins 61 and 62.

  In particular, in the inverter-integrated rotating electrical machine 100, the formation density of the radiation fins 61 is smaller than the formation density of the radiation fins 62. In other words, the interval between the adjacent radiating fins 61 is wider than the interval between the adjacent radiating fins 62. In addition, the angle formed between the radial direction of the heat sink 50 and the extending direction of the radiating fins 61 is larger than the angle formed between the radial direction of the heat sink 50 and the extending direction of the radiating fins 62. For this reason, it can suppress that the pressure loss of the refrigerant | coolant M arises in the area | region by the side of the suction inlet (here opening 53) of the communicating path P. FIG.

  Further, in inverter-integrated dynamoelectric machine 100, power elements 22 constituting each arm of power module 20 are arranged along a direction intersecting with the extending direction of radiating fins 60. That is, the plurality of power elements 22 constituting each arm are arranged so as to intersect the flow path of the refrigerant M formed in the communication path P along the extending direction of the heat radiating fins 60. For this reason, it becomes possible to cool uniformly with respect to the several power element 22 which comprises each arm. Therefore, it is possible to suppress the temperature variation between the power elements 22 of each arm.

  The above embodiments describe one embodiment of the inverter-integrated rotating electrical machine according to the present invention. Therefore, the inverter-integrated rotating electrical machine according to the present invention is not limited to the inverter-integrated rotating electrical machine 100 described above. The inverter-integrated rotating electrical machine according to the present invention can be arbitrarily modified from the inverter-integrated rotating electrical machine 100 described above without departing from the scope of the claims.

  For example, in the above embodiment, the opening 16 on the rotating electrical machine 1 side is used as an outlet for discharging the refrigerant M from the space S according to the rotation of the fan 11, and the opening 53 on the inverter device 2 side is used as the opening of the fan 11. A suction port for sucking the refrigerant M into the space S according to the rotation is used. However, the opening 16 on the rotating electrical machine 1 side is an intake port for sucking the refrigerant M into the space S according to the rotation of the fan 11, and the opening 53 on the inverter device 2 side is the space S according to the rotation of the fan 11. It is good also as a discharge port for discharging the refrigerant M from.

  In that case, the fixing portion 57 is formed on the side surface 50s of the heat sink 50 at a position between the opening 16 and the opening 53 and adjacent to the opening 53 of the heat sink 50 in the rotation direction A2 of the fan 11. Can do. Thereby, the flow of the refrigerant M discharged from the opening 53 following the rotation of the fan 11 is bent by the fixing portion 57 in a direction intersecting the rotation direction A2 of the fan 11. Therefore, the recirculation | reflux of the refrigerant | coolant M can be suppressed and the inverter apparatus 2 can be cooled more efficiently. That is, the wall portion for suppressing the recirculation of the refrigerant M may be provided at a position adjacent to the discharge port in the rotation direction of the fan 11.

  Moreover, in the said embodiment, the three power modules 20 used as the main cooling object were distributed, and they were arrange | positioned. Therefore, three openings 15, three openings 16, and three openings 53 are provided in order to form a refrigerant flow path (for example, the communication path P) for cooling each power module 20. Therefore, for example, when the number of power modules 20 is changed, the number of openings 15, openings 16, and openings 53 can be appropriately changed to a number corresponding to the number of power modules 20. That is, the number of openings 15, 16 and 53 can be any number.

  Furthermore, in the said embodiment, the fixing | fixed part 17 and 57 is extended over the opening 53 from the opening 16 along the direction A1 as a whole. The fixed portions 17 and 57 generally extend from the lower end of the opening 16 (end opposite to the inverter device 2) to the upper end of the opening 53 (end opposite to the rotating electrical machine 1). It may be present, or may extend partially between the lower end of the opening 16 and the upper end of the opening 53. That is, the fixing parts 17 and 57 may be provided at least between the opening 16 and the opening 53 in a range where the recirculation of the refrigerant M can be suppressed.

  DESCRIPTION OF SYMBOLS 1 ... Rotary electric machine, 2 ... Inverter apparatus, 10 ... Rotating shaft, 11 ... Fan (cooling fan), 12 ... Housing, 12b ... Side surface (side surface of rotating electrical machine), 15 ... Opening (3rd opening), 16 ... Opening (first opening), 17 ... fixed portion, 50 ... heat sink (heat radiating member), 50s ... side surface (side surface of inverter device), 53 ... opening (second opening), 60 ... radiating fin, 61 ... radiating fin (First radiating fin), 62... Radiating fin (second radiating fin), S... Space (accommodating space).

Claims (3)

A rotating electrical machine having a rotating shaft, a cooling fan that rotates as the rotating shaft rotates, and a housing that internally defines a housing space that houses the cooling fan;
An inverter device attached to the rotating electrical machine so that the heat radiating member is disposed on the housing.
A first opening is formed on a side surface of the rotating electrical machine,
A second opening is formed on a side surface of the inverter device,
A third opening for communicating the first opening and the second opening is formed on a surface of the housing facing the inverter device,
The inverter device has a heat radiation fin extending from the second opening toward the third opening;
The first opening and the second opening are arranged at different positions as viewed from the extending direction of the rotation shaft ,
The first opening is a discharge port for discharging the refrigerant from the accommodation space according to the rotation of the cooling fan,
The second opening is a suction port for sucking the refrigerant into the accommodation space through the third opening according to the rotation of the cooling fan,
A fixing portion for fixing the rotating electrical machine and the inverter device to each other is protruded from the side surfaces of the rotating electrical machine and the inverter device,
The fixing portion is at least a position between the first opening and the second opening,
Provided in a position adjacent to the first opening in the rotation direction of the cooling fan;
An inverter-integrated rotating electrical machine characterized by that. The inverter device has a substantially circular outer shape, and has a plurality of power modules and a plurality of capacitors.
The power module and the capacitor are alternately arranged at substantially equal intervals along the circumferential direction of the inverter device,
The radiating fin is formed in a portion corresponding to a power module mounting portion in the radiating member,
The first opening is formed at a position facing the capacitor in the housing.
The inverter-integrated dynamoelectric machine according to claim 1 . The radiating fin includes a plurality of first radiating fins formed in a region on the second opening side of the radiating member and a plurality of second radiating fins formed on a region on the third opening side of the radiating member. Including heat dissipation fins,
The formation density of the first radiation fins is smaller than the formation density of the second radiation fins,
The inverter-integrated dynamoelectric machine according to claim 1 or 2 .

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