JP2015192474A - Rotary electric machine device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine device which has a rotary electric machine and a power control unit and reduces influences of heat on the power control unit.SOLUTION: A rotary electric machine device 1 includes: a rotary electric machine 10 stored in a housing 60; and an inverter unit 80 which performs power control to the rotary electric machine 10. A rear cover 66 forming the inverter unit 80 side of the housing 60 is formed having heat conductivity lower than those of a stator fixing part 61 and a front cover 63, which form the housing 60, and inhibits heat in the housing 60 from being transmitted to the inverter unit 80 side. The rotary shaft 30 includes: a suction port 32 which communicates with a space between the rear cover 66 and the inverter unit 80; and an exhaust port 33 which communicates with a space at the front side of the front cover 63. A fan member 40 is fastened to an inner part of a ventilation passage 31 connecting the suction port 32 with the exhaust port 33.

Description

  The present invention relates to a rotating electrical machine apparatus including a rotating electrical machine such as a motor and a generator, and a power control device that performs power control related to the rotating electrical machine.

  2. Description of the Related Art Conventionally, a rotating electrical machine apparatus includes a rotating electrical machine such as a motor and a generator, and a power control device such as an inverter device that performs power control related to the rotating electrical machine. In these rotating electrical machines, power control devices such as inverter devices are vulnerable to heat compared to other devices. Therefore, the rotating electrical machine device considers the effect of heat generated by the rotating electrical machines on the power control device. There is a need.

  As an invention made in view of this point, for example, an invention described in Patent Document 1 is known. The rotating electrical machine device described in Patent Document 1 is configured by a rotating electrical machine main body and an inverter device, and is configured by integrating the inverter device directly in contact with the housing of the rotating electrical machine body. The rotating electrical machine main body is configured by housing a rotor including a fan and a stator inside the housing, and the inverter device includes a plurality of power control switching semiconductor elements disposed inside the case. It is comprised so that the electric power control with respect to a rotary electric machine main body may be performed. In the rotating electrical machine apparatus described in Patent Document 1, the temperature of the inverter device is blown by blowing cooling air generated by a fan rotating with the rotor to the inverter device through a hole formed in the end surface of the housing on the inverter device side. The rise is suppressed.

JP 2009-148204 A

  As described above, in the rotating electrical machine device described in Patent Document 1, since the cover of the inverter device is directly attached to the housing of the rotating electrical machine body, the heat generated by the operation of the rotating electrical machine is There is a possibility that the operation of the inverter device may be limited by the heat transmitted to the inverter device through the housing of the main body and the transmitted heat.

  Further, in these rotating electrical machines, the inverter device itself generates heat with its operation, so that the periphery of the inverter device is warmed. When the periphery of the inverter device is warmed, it becomes a factor that hinders cooling and heat dissipation of the inverter device. Therefore, when considering the influence of heat on the inverter device, it is necessary to consider the temperature environment around the inverter device.

  The present invention relates to a rotating electrical machine apparatus having a rotating electrical machine such as a motor and a generator, and a power control apparatus that performs power control related to the rotating electrical machine, and provides a rotating electrical machine apparatus that can reduce the influence of heat on the power control apparatus. To do.

  A rotating electrical machine apparatus according to one aspect of the present invention is provided with a rotor that is fixed to a rotating shaft that is rotatably arranged, and that rotates together with the rotating shaft, a stator core that is disposed radially outside the rotor, and A rotating electric machine having a stator having a coil wound around the stator core and configured by a conductive wire; a rotor housing the rotor and the stator therein; and one axial side of the housing And a power control device that controls the operation of the rotating electrical machine and the output power of the rotating electrical machine, wherein the rotating shaft is on one side in the axial direction along the rotating shaft A suction port formed in a portion on the one side of the end surface in the axial direction of the housing located between the power control device and the housing on the other side in the axial direction. A refrigerant passage that communicates with a discharge port that is formed on the other side of the direction end face, and is located inside the refrigerant passage and at a position between the suction port and the discharge port. The housing has a first cover formed on the side of the power control device, the first cover having a lower thermal conductivity than other parts constituting the housing.

The rotating electrical machine device includes a rotating electrical machine configured by housing a rotor fixed to a rotating shaft and a stator disposed radially outside the rotor in a housing, and the operation and rotation of the rotating electrical machine. And a power control device that controls the output power of the electric machine. Here, when the rotating electrical machine is driven by rotating the rotor together with the rotating shaft, heat is generated accordingly. According to the rotating electrical machine apparatus, the housing has the first cover on the power control apparatus side, and the first cover is formed to have lower thermal conductivity than the other parts constituting the housing. . Therefore, according to the rotating electrical machine apparatus, by disposing the first cover having lower thermal conductivity than the other part of the housing on the power control apparatus side, the heat generated by the operation of the rotating electrical machine inside the housing can be reduced. Transmission to the power control device can be suppressed.
Further, the rotating shaft is on one side of the axial end surface of the housing on one side in the axial direction, has a suction port in a portion between the rotating shaft and the power control device, and is on the other side in the axial direction. A discharge port is provided on the other side of the housing in the axial direction. Further, the rotating shaft has a refrigerant passage that connects the suction port and the discharge port, and has a fan between the suction port and the discharge port inside the refrigerant passage. Therefore, according to the rotating electrical machine apparatus, the fan rotates with the rotating shaft inside the refrigerant passage due to the rotation of the rotor and the rotating shaft in accordance with the operation of the rotating electric machine. In addition, the refrigerant positioned between the housing and the power control device on one side in the axial direction can be introduced into the refrigerant passage through the suction port and discharged to the other side of the housing through the discharge port. That is, according to the rotating electrical machine apparatus, the refrigerant positioned around the power control apparatus can be circulated, and the influence of heat on the power control apparatus can be reduced.

  A rotating electrical machine apparatus according to another aspect of the present invention is the rotating electrical machine apparatus according to claim 1, wherein the first cover is arranged so as to shield the rotor and the stator from the power control apparatus side. It is provided.

  In the rotating electrical machine apparatus, the first cover is disposed so as to shield the rotor and the stator from the power control apparatus side. Therefore, according to the rotating electrical machine apparatus, the movement of the refrigerant between the inside of the housing of the rotating electrical machine and the periphery of the power control device can be blocked on one side in the axial direction. It is possible to further suppress the heat generated in this way from being transmitted to the power control device.

  A rotating electrical machine apparatus according to another aspect of the present invention is the rotating electrical machine apparatus according to claim 1 or 2, wherein the first cover reduces heat transfer to a surface facing the stator. It has a heat insulating material.

  According to the rotating electrical machine apparatus, since the first cover has a heat insulating material that reduces heat transfer on the surface facing the stator, the first cover includes a stator that is one of heat generation sources in the rotating electrical machine. Therefore, the heat generated by the operation of the rotating electrical machine inside the housing can be further suppressed from being transmitted to the power control device.

  A rotating electrical machine apparatus according to another aspect of the present invention is the rotating electrical machine apparatus according to any one of claims 1 to 3, wherein the housing is outside of other portions except the first cover. It has the fin formed in the shape of a protrusion on the surface.

  In the rotating electrical machine apparatus, the housing has fins formed in a protruding shape on an outer surface of the other part excluding the first cover, and the fins are used to form a refrigerant positioned outside the housing. The contact area can be increased. As a result, according to the rotating electrical machine apparatus, the heat generated in the rotor and stator inside the housing by the fins formed on the other portions of the housing excluding the first cover in a direction different from that of the power control apparatus. Heat can be radiated efficiently, and the influence of heat on the power control device can be reduced.

  A rotating electrical machine apparatus according to another aspect of the present invention is the rotating electrical machine apparatus according to any one of claims 1 to 4, wherein the housing is disposed on the other side in the axial direction. A second cover having a higher thermal conductivity than the first cover, the second cover having a through-hole penetrating along a surface located on the other side in the axial direction; An external fan member is fixed to the shaft on the end side with respect to the axial end surface of the rotor core of the rotor in the housing on the other axial side, and the external fan member By rotating together with the shaft, the refrigerant flows toward the other side in the axial direction.

  The rotating electrical machine apparatus has a second cover having a through hole on the other side in the axial direction of the housing, and an external fan member is fixed to the rotating shaft on the other side in the axial direction inside the housing. Yes. Therefore, when the rotating shaft is rotated by the operation of the rotating electrical machine, the external fan member is also rotated, and a refrigerant flow toward the other side in the axial direction can be generated. Since the flow of the refrigerant flows from the inside of the housing to the outside through the through hole of the second cover, the heat inside the housing can be released to the outside. In addition, since heat exchange is performed between the second cover and the refrigerant when passing through the through hole, according to the rotating electrical machine apparatus, heat dissipation of the rotating electrical machine using the second cover can be promoted. .

  A rotating electrical machine apparatus according to another aspect of the present invention is the rotating electrical machine apparatus according to claim 5, wherein the through hole of the second cover extends along the axial direction to the inner surface of the through hole. It has the fin in a hole formed in the protrusion.

  According to the rotating electrical machine apparatus, since the in-hole fin is formed on the inner surface of the through hole of the second cover with the protrusion extending along the axial direction, the contact area with the refrigerant flowing in the through hole is reduced. Can be bigger. Thereby, according to the said rotary electric machine apparatus, when passing a through-hole, heat exchange can be performed efficiently between a 2nd cover and a refrigerant | coolant, and also the heat dissipation of the rotary electric machine using a 2nd cover is further carried out. Can be promoted.

It is sectional drawing which shows schematic structure of the rotary electric machine apparatus which concerns on this embodiment. It is explanatory drawing which shows arrangement | positioning of the fan member with respect to the rotating shaft in the rotary electric machine apparatus which concerns on this embodiment. It is an external appearance perspective view of the fan member in this embodiment. It is a front view of the fan member in this embodiment. It is a front view of the front cover concerning this embodiment. It is a front view of the inverter unit which concerns on this embodiment. It is explanatory drawing which shows the other structural example of the rear cover in a rotary electric machine apparatus.

  Hereinafter, an embodiment in which a rotating electrical machine apparatus according to the present invention is embodied in the rotating electrical machine apparatus 1 will be described in detail with reference to the drawings. In the following description, when the rotating shaft 30 of the rotating electrical machine 10 constituting the rotating electrical machine apparatus 1 is arranged so as to be parallel to the placement surface, the axial direction of the rotating shaft 30 is defined as the rotating electrical machine. The front-rear direction of the device 1 is assumed. Then, with reference to the rotating electrical machine apparatus 1 in this state, the vertical direction and the horizontal direction of the rotating electrical machine apparatus 1 will be defined and described.

  First, the rotating electrical machine apparatus 1 according to the present embodiment includes a rotating electrical machine 10 and an inverter unit 80, and the inverter unit 80 is attached to the rear portion of the housing 60 of the rotating electrical machine 10 with an attachment member 85. It is integrated through. And in the said rotary electric machine apparatus 1, the rotary electric machine 10 comprises the drive apparatus of a vehicle, for example, and the inside of the housing 60 arrange | positioned between the power transmission part (not shown) and the inverter unit 80, The rotor 20 and the stator 50 are accommodated. The inverter unit 80 is disposed to control the operation of the rotating electrical machine 10 and the output power of the rotating electrical machine 10. In addition, the above-mentioned power transmission part is a mechanism which transmits rotational force, such as a gear box or a gear, a pulley, for example.

  As shown in FIG. 1, the rotating electrical machine 10 is a cage type three-phase induction motor, and includes a rotor 60 configured as a cage rotor and a stator 50 that generates a rotating magnetic flux by a three-phase alternating current. It is configured by being housed inside. The rotating electrical machine 10 links the rotor 20 with a rotating shaft by interlinking a rotating magnetic flux generated from a stator 50 described later and an induced current generated in the secondary conductor 22 of the rotor 20 configured as a cage rotor. 30 can be rotated.

  The rotor 20 of the rotating electrical machine 10 is configured as a squirrel-cage rotor, and is fixed to be rotatable around the axis of the rotary shaft 30. As shown in FIG. 1, the rotor 20 includes a cylindrical rotor core 21, a plurality of secondary conductors 22 distributed in the circumferential direction of the rotor core 21, and end rings that are joined to both axial ends of the secondary conductor 22. 23.

  The rotor core 21 is configured in a cylindrical shape so as to surround the rotating shaft 30 by laminating a plurality of plates made of electromagnetic steel plates, and is fixed to the rotating shaft 30. Further, the outer peripheral surface of the rotor core 21 faces the inner peripheral surface (the surface on the rotating shaft 30 side) of the stator 50 in a state of being spaced apart.

  The plurality of secondary conductors 22 are formed in a solid rod shape by a conductive material, and are distributed at equal intervals along the circumferential direction of the rotor core 21. As shown in FIG. 1, each secondary conductor 22 is arranged so as to extend in a straight line along the axial direction of the rotor core 21. Further, the length dimension of each secondary conductor 22 is formed substantially equal to the axial dimension of the rotor core 21.

  The end ring 23 is a member called an end ring or a short-circuit ring, and is formed in an annular shape by a conductive material like the secondary conductor 22. The end ring 23 is disposed along both end faces of the rotor core 21 in the axial direction of the rotating shaft 30, and is joined to the end of each secondary conductor 22. Thereby, each secondary conductor 22 is short-circuited by being joined to the pair of end rings 23.

  The rotating shaft 30 is rotatably supported in the housing 60 via a bearing 70 disposed in the housing 60, and functions as the rotation center of the rotor 20 (see FIG. 1). The rotating shaft 30 extends in the front-rear direction at the center of the stator 50 in the vertical cross section of the rotating electrical machine 10.

  As shown in FIG. 1, the rotating shaft 30 is a shaft member formed in a hollow shape, and includes a ventilation passage 31 as a refrigerant passage, an intake port 32 as an intake port, and an exhaust port 33 as an exhaust port. Have. The ventilation path 31 extends along the axial direction of the rotary shaft 30 and connects the intake port 32 and the exhaust port 33.

  As shown in FIG. 1, the air inlet 32 is formed on the inverter unit 80 side with respect to the axial end surface of the housing 60 on the inverter unit 80 side (that is, the rear cover 66). It communicates with the space between the unit 80. In the present embodiment, the intake ports 32 are formed at a plurality of locations on the axial end surface of the rotating shaft 30 and the outer peripheral surface of the rotating shaft 30 on the inverter unit 80 side of the rotating shaft 30. The intake port 32 functions as an opening that sucks air as a refrigerant located between the axial end surface of the housing 60 and the inverter unit 80 into the air passage 31.

  In the present embodiment, the intake port 32 has a plurality of locations on the end surface of the rotating shaft 30 located on one side (that is, on the inverter unit 80 side) of the housing 60 in the axial direction and on the outer peripheral surface of the rotating shaft 30. However, it is not limited to this position. The intake port 32 can be formed at various locations on the rotating shaft 30 as long as it is closer to the inverter unit 80 than the end surface in the axial direction of the housing 60 and between the inverter unit 80.

  As shown in FIG. 1, the exhaust port 33 is on the opposite side of the inverter unit 80 side (that is, the front side of the rotating electrical machine device 1 and the power transmission unit side) from the axial end surface of the front cover 63 in the housing 60. Is also formed on the front side. In the present embodiment, the exhaust port 33 is formed on the front end surface of the rotary shaft 30. For example, if a gear or pulley is connected, the exhaust port 33 is formed on the end surface of the rotary shaft 30 penetrating the gear or pulley. ing. The exhaust port 33 functions as an opening for exhausting the air inside the ventilation path 31 to the front side in the rotating electrical machine apparatus 1.

  In the present embodiment, the exhaust port 33 is formed on the end surface of the rotary shaft 30 located on the other side (that is, the front side of the rotating electrical machine device 1 and the power transmission unit side) with respect to the axial end surface of the rotor 20. However, it is not limited to this position. The exhaust port 33 can be formed at various locations on the rotary shaft 30 as long as it is on the front side of the end surface in the axial direction of the front cover 63.

  As shown in FIGS. 1 and 2, the fan member 40 is fixed between the air inlet 32 and the air outlet 33 by shrink fitting inside the air passage 31 of the rotary shaft 30. The fan member 40 includes a plurality of (eight in the present embodiment) blade portions 41 that draw a spiral in the axial direction of the fan member 40 inside the cylindrical member (see FIGS. 3 and 4). The fan member 40 is rotated to generate an airflow in the axial direction.

  As shown in FIG. 1, the stator 50 is fixed inside the housing 60 and includes a substantially cylindrical stator core 51 and a stator coil wound around the stator core 51. The stator core 51 has a substantially cylindrical shape formed by laminating a plurality of electromagnetic steel plates. The stator core 51 has a plurality of teeth and slots (not shown) that are distributed in the circumferential direction and extend in the axial direction. Each slot is formed between the circumferential directions of the two teeth.

  The stator coil is made of a conductor and is wound around the teeth through each slot formed in the stator core 51. As described above, since the stator 50 is a stator of an induction motor driven by three-phase alternating current, the stator 50 includes three-phase stator coils of U phase, V phase, and W phase, and is supplied with alternating current of each phase. As a result, a rotating magnetic flux is generated. The stator coils of each phase are wound over a plurality of slots formed in the stator core 51 so as to cover the end surface of the stator core 51 in the axial direction. Therefore, the coil end portions 52 are formed on both sides in the axial direction of the stator core 51 so as to protrude from the axial end surface of the stator core 51 as a part of the stator coil in the stator 50.

  The housing 60 is a case for housing the rotor 20 and the stator 50, and includes a stator fixing portion 61, a front cover 63, and a rear cover 66 (see FIG. 1). The stator fixing portion 61 is a cylindrical housing located between the front cover 63 and the rear cover 66. When the stator core 51 is press-fitted into the inner diameter of the cylindrical housing, The stator 50 is fixed at a predetermined position. The stator fixing portion 61 is formed to have higher thermal conductivity than the rear cover 66 constituting the housing 60. For example, by adjusting the constituent ratio of steel, aluminum alloy, and magnesium alloy, the stator fixing portion 61 is more than the rear cover 66. It is formed so as to have high thermal conductivity.

  A plurality of external fins 62 are formed on the outer surface of the stator fixing portion 61. Each external fin 62 is formed as a protrusion that protrudes outward of the stator fixing portion 61, and increases the contact area with air located around the stator fixing portion 61. As a result, the stator fixing portion 61 can be promoted by the plurality of external fins 62 to radiate heat transferred to the stator fixing portion 61 that is generated when the rotating electrical machine 10 is driven.

  The front cover 63 constitutes a portion on the front side (power transmission unit side) of the housing 60 and covers the rotor 20 and the stator 50 on the front side of the rotating electrical machine apparatus 1. The front cover 63 has a bearing 70 on the front side surface thereof, and the rotary shaft 30 is rotatably supported by the bearing 70. The front cover 63 is formed with higher thermal conductivity than the rear cover 66 constituting the housing 60, like the stator fixing portion 61. For example, the front cover 63 is adjusted by adjusting the composition ratio of steel, aluminum alloy, and magnesium alloy. The heat conductivity is higher than that of the rear cover 66.

  As shown in FIGS. 1 and 5, a plurality of external fins 64 are formed on the outer surface of the front cover 63. Each external fin 64 is formed as a ridge protruding in the outward direction of the front cover 63, and increases the contact area with the air located around the front cover 63. Thereby, the front cover 63 can be generated by the driving of the rotating electrical machine 10, and heat dissipation of the heat transmitted to the stator fixing portion 61 can be promoted by the plurality of external fins 64.

  The front cover 63 has a plurality of vent holes 65 on the side surface constituting the front end face of the rotating electrical machine apparatus 1. As shown in FIG. 5, the plurality of air holes 65 are formed at three locations around the rotation shaft 30 at a certain interval on the side surface constituting the front end surface of the rotating electrical machine apparatus 1. The vent holes 65 penetrate the side surfaces of the front cover 63 so as to communicate the inside of the housing 60 and the outside of the rotating electrical machine apparatus 1, respectively. Therefore, according to the rotating electrical machine apparatus 1, the gas inside the housing 60 is discharged to the front side of the rotating electrical machine apparatus 1 (that is, the side opposite to the inverter unit 80) through the vent holes 65 of the front cover 63. can do.

  A plurality of in-hole fins 65A are formed on the inner surface of each vent hole 65 as ridges extending along the axial direction (see FIG. 5). Each of the in-hole fins 65A can increase the contact area with the base that passes through the inside of the vent hole 65, so that heat exchange with the gas can be promoted. The heat dissipation efficiency can be further improved.

  The rear cover 66 constitutes a portion on the rear side of the housing 60 (inverter unit 80), and covers the rotor 20 and the stator 50 on the inverter unit 80 side. The rear cover 66 has a bearing 70 on the surface on the inverter unit 80 side, like the front cover 63, and the rotary shaft 30 is rotatably supported by the bearing 70. The rear cover 66 is formed to have lower thermal conductivity than the stator fixing portion 61 and the external fins 64 constituting the housing 60. For example, by adjusting the composition ratio of steel, aluminum alloy, and magnesium alloy, the stator cover can be fixed. The heat conductivity is lower than that of the portion 61 and the external fin 64.

  A heat insulating material 67 is disposed inside the rear cover 66. The heat insulating material 67 is made of a resin having lower thermal conductivity than the constituent material of the rear cover 66 and is disposed on the surface facing the stator 50 inside the housing 60 (that is, the inner surface of the housing 60). . Therefore, heat transmission from the coil end portion 52 of the stator 50, which is a heat generation source associated with the driving of the rotating electrical machine 10, can be suppressed by the heat insulating material 67.

  As shown in FIG. 1, an external fan member 75 is fixed to the rotary shaft 30 inside the housing 60. The external fan member 75 is disposed on the front side of the rotating electrical machine device 1 relative to the axial end surface of the rotor core 21 of the rotor 20, and is configured to rotate together with the rotating shaft 30. Therefore, the external fan member 75 can generate an air flow toward the axial direction of the rotor 20 (the rotor 20 and the stator 50) by rotating together with the rotary shaft 30. As a result, the rotating electrical machine 10 causes the air inside the housing 60 heated by the driving of the rotating electrical machine 10 to be generated by the external fan member 75 through the plurality of vent holes 65 formed in the front cover 63. As a result, it can be discharged to the outside of the housing 60 (the front side of the rotating electrical machine device 1).

  Next, the inverter unit 80 of the rotating electrical machine apparatus 1 according to this embodiment will be described with reference to the drawings. As shown in FIG. 1, the inverter unit 80 is disposed behind the rotating electrical machine 10 in the rotating electrical machine apparatus 1, and is integrated with the rear cover 66 of the housing 60 via a plurality of mounting members 85. The inverter unit 80 is disposed to control the operation of the rotating electrical machine 10 and the output power of the rotating electrical machine 10, and is configured by molding a control device and a plurality of switching semiconductor elements for power control inside the case. Yes. That is, when the rotating electrical machine 10 operates as a motor, the inverter unit 80 converts DC power from an external DC power source such as a battery into three-phase AC power, and converts each phase of the stator coil for three phases. The coil is supplied as a stator current. When the rotating electrical machine 10 operates as a generator, the inverter unit 80 synchronously rectifies the stator current generated in the stator coil of the stator 50 and stores the generated DC power in an external battery or the like. The inverter unit 80 has at least six power control switching semiconductor elements for converting DC power into AC power, and MOS-FETs are used as the power control switching semiconductor elements. .

  As shown in FIGS. 1 and 6, the inverter unit 80 has a plurality of plate-like fins 81 and a plurality of pin-like fins 82 on the surface facing the rotating electrical machine 10 (that is, the front surface of the inverter unit 80). ing. The plate-like fins 81 are erected with respect to the case surface of the inverter unit 80, and are formed in a plate shape that extends radially about the rotating shaft 30. The plurality of pin-shaped fins 82 are arranged around the rotating shaft 30 on the case surface of the inverter unit 80 and are erected on the case surface. Each of the plate-like fins 81 and each of the pin-like fins 82 is formed integrally with the case of the inverter unit 80, and radiates heat generated in a plurality of power control switching semiconductor elements as the inverter unit 80 is driven. Facilitate.

  The heat transfer in the rotating electrical machine apparatus 1 having the above-described configuration will be described. In the rotating electrical machine apparatus 1, when the rotor 20 rotates together with the rotating shaft 30 by driving the rotating electrical machine 10, the coil end portion 52 of the stator 50 generates heat and heat is generated inside the housing 60. Further, when the rotating electrical machine 10 is driven, power control is performed by the inverter unit 80, so that heat is also generated in the inverter unit 80.

  Heat generated in the rotor 20 and the stator 50 inside the housing 60 is transmitted to the housing 60. Here, in the housing 60, the rear cover 66 located on the inverter unit 80 side is formed with lower thermal conductivity than the stator fixing portion 61 and the front cover 63, and a heat insulating material 67 is provided on the inner surface side of the housing 60. Have. Therefore, the heat generated in the rotor 20 and the stator 50 in the housing 60 can be prevented from being conducted to the rear cover 66 side, and the influence of the heat on the inverter unit 80 can be reduced.

  The heat transmitted to the housing 60 is transmitted not to the rear cover 66 but to the stator fixing portion 61 and the front cover 63 side having high thermal conductivity, among the members constituting the housing 60. The heat transmitted to the stator fixing portion 61 and the front cover 63 is radiated to the periphery of the housing 60 via the external fins 62 and the external fins 64, respectively. As can be seen from FIG. 1, the stator fixing portion 61 and the front cover 63 in the housing 60 are arranged at positions away from the inverter unit 80 in the rotating electrical machine apparatus 1, and therefore, according to the rotating electrical machine apparatus 1, the stator The influence of the heat radiated from the fixing portion 61 and the front cover 63 on the inverter unit 80 can be reduced.

  Further, the heat generated inside the housing 60 warms the gas inside the housing 60 and causes a temperature rise of the rotating electrical machine 10 including the housing 60. In this regard, an external fan member 75 is fixed to the rotary shaft 30 on the front side of the rotating electrical machine apparatus 1, and the front cover 63 located on the front side of the housing 60 has a plurality of vent holes 65. (See FIG. 1). Accordingly, the air inside the housing 60 warmed by the driving of the rotating electrical machine 10 is caused to flow outside the housing 60 through the air holes 65 by the airflow generated by the rotation of the external fan member 75 accompanying the driving of the rotating electrical machine 10. It is exhausted to the front side of the rotating electrical machine apparatus 1. Thereby, since the gas warmed inside the housing 60 can be discharged to the outside of the housing 60, according to the rotating electrical machine apparatus 1, the temperature rise of the rotating electrical machine 10 can be suppressed, and thus the inverter unit The influence of heat on 80 can be suppressed.

  As shown in FIG. 5, a plurality of in-hole fins 65 </ b> A are formed on the inner surface of each vent hole 65 of the front cover 63 to increase the contact area with the airflow passing through the vent hole 65. . Therefore, since heat exchange between the heat transmitted to the front cover 63 and the airflow passing through the vent hole 65 can be promoted, the rotating electrical machine apparatus 1 reduces the influence of heat on the inverter unit 80. Can be made.

  As described above, in the inverter unit 80, heat is generated in accordance with power control for the rotating electrical machine 10, and the heat is generated around the inverter unit 80 via the plurality of plate-like fins 81 and the plurality of pin-like fins 82. Heat is dissipated. As shown in FIG. 1, the plate-like fins 81 and the pin-like fins 82 are formed on the surface of the inverter unit 80 on the rotating electrical machine 10 side (that is, the rear cover 66 side). Therefore, in the rotating electrical machine apparatus 1, the gas located between the rear cover 66 of the rotating electrical machine 10 and the inverter unit 80 is warmed by the heat radiated from the inverter unit 80.

  As shown in FIG. 1, in the rotating electrical machine 10 according to the present embodiment, the intake port 32 of the rotary shaft 30 communicates with the space between the rear cover 66 and the inverter unit 80, and the exhaust port 33 of the rotary shaft 30. Is in communication with the space ahead of the front cover 63. Further, the rotary shaft 30 has a ventilation path 31 that communicates the intake port 32 and the exhaust port 33, and a fan member 40 is provided between the intake port 32 and the exhaust port 33 inside the ventilation path 31. ing. According to the rotating electrical machine 10, the fan member 40 rotates together with the rotating shaft 30 inside the air passage 31 due to the rotation of the rotor 20 and the rotating shaft 30. It can generate an air flow toward

  As a result, the air between the rear cover 66 and the inverter unit 80 is introduced into the air passage 31 through the intake port 32, and reverse to the inverter unit 80 through the rotary electrical machine 10 through the exhaust port 33. It can be discharged into the side space. Therefore, according to the rotating electrical machine apparatus 1, the air located between the rear cover 66 and the inverter unit 80 heated by the heat accompanying the drive of the inverter unit 80 can be moved from the inverter unit 80. The influence of heat on 80 can be reduced.

  As described above, according to the rotating electrical machine apparatus 1 according to the present embodiment, the heat conductivity of the rear cover 66 of the housing 60, the configuration of the stator fixing portion 61 and the front cover 63, and the external fan member 75, While reducing the influence of the heat generated by the drive on the inverter unit 80, the heat generated by the drive of the inverter unit 80 due to the movement of the gas through the air passage 31 of the rotating shaft 30 affects the inverter unit 80 itself. The influence can be reduced.

  As described above, the rotating electrical machine apparatus 1 according to the present embodiment accommodates the rotor 20 fixed to the rotating shaft 30 and the stator 50 disposed radially outside the rotor 20 in the housing 60. And the inverter unit 80 for controlling the operation of the rotating electrical machine 10 and the output power of the rotating electrical machine 10 (see FIG. 1). Here, when the rotary electric machine 10 is driven by rotating the rotor 20 together with the rotary shaft 30, heat is generated accordingly. According to the rotating electrical machine apparatus 1, the rear cover 66 is provided on the side of the inverter unit 80 in the housing 60, and the rear cover 66 has other parts constituting the housing 60 (that is, the stator fixing portion 61, the front cover). The heat conductivity is lower than that of 63). Therefore, according to the rotating electrical machine apparatus 1, the rear cover 66 having lower thermal conductivity than the other parts of the housing 60 (the stator fixing portion 61 and the front cover 63) is arranged on the inverter unit 80 side, thereby Therefore, it is possible to suppress the heat generated with the operation of the rotating electrical machine 10 from being transmitted to the inverter unit 80.

  The rotary shaft 30 is on one side of the axial end surface of the rear cover 66 on one side in the axial direction, and has an air inlet 32 in a portion between the rotary unit 80 and the shaft. An exhaust port 33 is provided on the other side of the end surface in the axial direction of the front cover 63 corresponding to the other side in the direction. Further, the rotary shaft 30 has a ventilation path 31 that communicates the intake port 32 and the exhaust port 33, and a fan member 40 is provided between the intake port 32 and the exhaust port 33 inside the ventilation path 31. ing. Therefore, according to the rotating electrical machine apparatus 1, the fan member 40 rotates with the rotating shaft 30 inside the air passage 31 due to the rotation of the rotor 20 and the rotating shaft 30 with the operation of the rotating electrical machine 10. The gas located between the rear cover 66 and the inverter unit 80 is introduced into the air passage 31 through the intake port 32, and the front cover 63 is connected through the exhaust port 33. Can be discharged to the front side. That is, according to the rotating electrical machine apparatus 1, the gas located around the inverter unit 80 can be circulated, and the influence of heat on the inverter unit 80 can be reduced.

  As shown in FIG. 1, the rear cover 66 is disposed so as to shield the inverter unit 80 of the rotor 20 and the stator 50, so according to the rotating electrical machine device 1, the rear cover 66 is located behind the rotating electrical machine device 1. Since the movement of gas between the inside of the housing 60 of the rotating electrical machine 10 and the periphery of the inverter unit 80 can be blocked on the side, the heat generated by the operation of the rotating electrical machine 10 inside the housing 60 is transferred to the inverter unit 80. It is possible to further suppress the transmission.

  Furthermore, since the rear cover 66 has a heat insulating material 67 for reducing heat transfer on the inner surface facing the stator 50, the heat from the stator 50, which is one of the heat generation sources in the rotating electrical machine 10. The movement can be reduced by the heat insulating material 67, so that the influence of heat on the inverter unit 80 can be reduced.

  In the rotating electrical machine apparatus, the housing 60 includes external fins 62 and external fins 64 formed in a protruding shape on the outer surface of other parts (that is, the stator fixing portion 61 and the front cover 63) excluding the rear cover 66. The contact area with the gas located outside the housing 60 can be increased by the external fins 62 and the external fins 64. Thus, according to the rotating electrical machine apparatus 1, the external fins 62 formed on the stator fixing portion 61 of the housing 60 and the external fins 64 formed on the front cover 63 cause the rotor 20 and the stator 50 inside the housing 60. The heat can be radiated more efficiently to a position away from the inverter unit 80, and the influence of heat on the inverter unit 80 can be reduced.

  The rotating electrical machine apparatus 1 includes a front cover 63 having a plurality of ventilation holes 65 on the front side of the housing 60, and an external fan member 75 on the rotary shaft 30 on the axially front side inside the housing 60. Is fixed. Therefore, when the rotating shaft 30 is rotated by the operation of the rotating electrical machine 10, the external fan member 75 is also rotated, and an airflow toward the front side can be generated. Since this airflow flows from the inside of the housing 60 to the outside through the plurality of vent holes 65 of the front cover 63, the heat inside the housing 60 can be released to the outside. Further, since heat exchange is performed between the front cover 63 and the air flow medium when passing through the vent hole 65, according to the rotating electrical machine apparatus 1, heat dissipation of the rotating electrical machine 10 using the front cover 63 is promoted. can do.

  Furthermore, as shown in FIG. 5, a plurality of in-hole fins 65 </ b> A are formed on the inner surface of each vent hole 65 of the front cover 63 so as to extend along the axial direction. The contact area with the flowing gas can be increased. Thereby, according to the said rotary electric machine apparatus 1, when passing each ventilation hole 65, heat exchange can be performed efficiently between the front cover 63 and gas, and the rotary electric machine 10 using the front cover 63 is used. Heat dissipation can be further promoted.

  Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the rotating electrical machine according to the present invention is applied to a squirrel-cage three-phase induction motor, but is not limited to this aspect, and the present invention is applied to any rotating electrical machine. be able to. Specifically, for example, the rotating electrical machine according to the present invention can be applied to an IPM motor.

  In the above-described embodiment, the heat conductivity of the stator fixing portion 61, the front cover 63, and the rear cover 66 that constitute the housing 60 is adjusted by using a steel, aluminum alloy, or magnesium alloy with a adjusted composition ratio, and the rear cover. Although the heat conductivity of the rear cover 66 is configured to be lower than that of the other components by disposing the heat insulating material 67 on the inner surface of the 66, the present invention is not limited to this mode. That is, it is only necessary that the rear cover 66 located on the inverter unit 80 side among the components constituting the housing 60 has a lower thermal conductivity than the stator fixing portion 61 and the front cover 63. Does not matter.

  For example, as shown in FIG. 7, with respect to the thickness direction of the rear cover 66, the stator fixing portion is configured by alternately laminating metal layers such as steel, aluminum alloy, and magnesium alloy and heat insulating material layers such as resin. 61, the heat conductivity of the rear cover 66 may be lower than that of the front cover 63.

  Further, the heat conductivity may be made lower than that of the stator fixing portion 61 and the front cover 63 constituting the housing 60 depending on the structure of the rear cover 66. For example, a configuration may be adopted in which a hollow portion is formed in the wall portion of the rear cover 66 and the air in the hollow portion functions as a heat insulating material.

Further, it is not always necessary to provide the heat insulating material 67 with respect to the rear cover 66. If the heat conductivity of the rear cover 66 is lower than that of the stator fixing portion 61 and the front cover 63, the respective constituent materials are selected. It may be realized only by. For example, you may implement | achieve by adjusting the component ratio of the steel, aluminum alloy, and magnesium alloy as a constituent material of the housing 60. FIG. For example, a magnesium alloy “AZ91B” may be used as a constituent material of the stator fixing portion 61 and the front cover 63, and an aluminum alloy “AC4C” may be used as a constituent material of the rear cover 66.
Further, it is desirable that the mounting member 85 be formed to have a lower thermal conductivity than the stator fixing portion 61 and the front cover 63, similarly to the rear cover 66.

In the above-described embodiment, air (gas) is used as the refrigerant, but a liquid cooling type using water or oil may be used.
Further, although the exhaust port 33 as the discharge port is provided at the end of the rotating shaft 30 on the front side of the rotating electrical machine apparatus 1, it may be provided on the front side of the axial end surface of the housing 60. You may provide in an outer peripheral surface.

DESCRIPTION OF SYMBOLS 1 Rotating electrical machine apparatus 10 Rotating electrical machine 20 Rotor 30 Rotating shaft 31 Ventilation path 32 Intake port 33 Exhaust port 40 Fan member 50 Stator 60 Housing 61 Stator fixing part 62 External fin 63 Front cover 64 External fin 65 Vent hole 65A In-hole fin 66 Rear cover 67 Insulating material 75 External fan member 80 Inverter unit

Claims (6)

A rotor fixed to a rotatable rotation shaft and rotated together with the rotation shaft, a stator core disposed radially outside the rotor, and a conductive wire wound around the stator core. A rotating electrical machine having a stator having a coil, and a housing that accommodates the rotor and the stator therein;
A rotating electrical machine device that is disposed on one side in the axial direction with respect to the housing and has a power control device that controls operation of the rotating electrical machine and output power of the rotating electrical machine,
The rotation axis is
A suction port formed on a portion of the housing located on one side in the axial direction along the rotation axis and between the power control device and on the other side in the axial direction; A refrigerant passage communicating with a discharge port formed on the other side of the axial end surface of the housing corresponding to the housing,
Inside the refrigerant passage, at a position between the suction port and the discharge port, has a fan,
The housing is
A rotating electrical machine apparatus comprising a first cover formed on the side of the power control device, the first cover having a lower thermal conductivity than the other parts constituting the housing. The rotating electrical machine apparatus according to claim 1,
The first cover is
A rotating electrical machine apparatus that is disposed so as to shield the rotor and the stator from the power control device side. The rotating electrical machine apparatus according to claim 1 or 2,
The first cover is
A rotating electrical machine apparatus comprising a heat insulating material for reducing heat transfer on a surface facing the stator. A rotating electrical machine apparatus according to any one of claims 1 to 3,
The housing is
A rotating electrical machine apparatus having a fin formed in a protruding shape on an outer surface of the other part excluding the first cover. A rotating electrical machine apparatus according to any one of claims 1 to 4,
The housing is
A second cover disposed on the other side in the axial direction and having a higher thermal conductivity than the first cover;
The second cover is
Having a through hole penetrating the surface located on the other side in the axial direction along the axial direction;
The rotating shaft includes
In the housing on the other side in the axial direction, an external fan member is fixedly provided on the end side of the rotor core of the rotor in the axial direction.
The external fan member is
A rotating electrical machine apparatus that generates a refrigerant flow toward the other side in the axial direction by rotating together with the rotating shaft. The rotating electrical machine apparatus according to claim 5,
The through hole of the second cover is
A rotating electrical machine apparatus characterized by having an in-hole fin formed on a protrusion extending along the axial direction on the inner surface of the through hole.

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