JP2016201932A - Controller integrated rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller integrated rotary electric machine that improves a cooling performance of a controller part.SOLUTION: A rotary machine body 2 comprises: a pair of brackets formed from a front bracket 6 and a rear bracket 7; a stator 5 which includes a stator coil 4 and of which both the ends are fixed to the pair of brackets 6 and 7; and a rotor 9 which includes a rotor coil 8 and is disposed inside of the stator 5 and supported by the pair of brackets 6 and 7 in a freely rotatable manner. On the other hand, a controller 3 comprises; a power circuit part 20 that performs power conversion between the stator coil 4 and an external DC power source; and a control circuit part 21 that controls the power circuit part 20. The power circuit part 20 is configured by mounting a switching element 31 that uses a semiconductor material of SiC or GaN on a metal substrate 30. The metal substrate 30 is fixed in contact with an outer surface side of the rear bracket 7, and the control circuit part 21 is disposed outside of the power circuit part 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a controller-integrated rotating electrical machine in which a rotating electrical machine main body and a control unit including a power circuit are integrated and used, for example, in an automobile or the like.

2. Description of the Related Art An in-vehicle controller-integrated rotating electrical machine in which a control device for controlling a rotating electrical machine and a rotating electrical machine main body are integrated has been known.
For example, a rotating electrical machine in which a power module having a switching element is disposed outside one of a pair of housings that support a stator, the power module being mounted on a heat sink in which cooling fins are formed, Is opposed to the housing surface, and a plate constituting an air passage between the housing surface and the heat sink is interposed between the opposing surfaces, and the housing is fixed to the housing. Thereby, the outside air sucked from the suction port passes through the air path between the heat sink and the plate and is exhausted from the window provided in the housing, thereby effectively cooling the power module (for example, Patent Document 1).

Further, a vehicular generator-motor apparatus having a configuration in which an SiC-MOSFET is used as a switching element and disposed inside a housing is disclosed.
For example, a rotating field magnetic pole that rotates together with a rotating shaft connected to a crankshaft of an engine, an armature having an armature coil and fixed to a housing, a plurality of MOSFETs, an armature coil and an external battery, AC-DC converting means connected between the two, and a MOSFET of the AC-DC converting means, a power generation mode for charging the battery by converting an AC output generated in the armature coil into a DC output, or from the battery to the armature The MOSFET is formed by using SiC as a material (see, for example, Patent Document 2).

Japanese Patent No. 5554277 (3rd page, FIG. 1) JP-A-7-184361 (2nd page, FIG. 1-2)

The controller-integrated rotating electrical machine is required to be installed in a limited space in the engine room of the vehicle. However, in the rotating electrical machine as in Patent Document 1, a heat sink for cooling the power module is indispensable, and the control module that controls the power module uses electronic components that are vulnerable to heat. The temperature of the heat sink is reduced through a plate to block heat reception from the stator that becomes high temperature, and there is a limit to reducing the axial dimension of the rotating electrical machine.
For this reason, in a vehicle model in which only a small space in the axial direction of the rotating electrical machine can be secured, there is a problem that the end cover of the rotating electrical machine interferes, and a work space for attaching a connector for connecting to an external device or a fixing screw. There was a problem that problems such as inability to secure could occur and the installation was restricted by the layout in the engine room.

  Further, Patent Document 2 shows a configuration in which a power circuit section using a SiC-MOSFET having excellent heat resistance as a switching element is arranged inside the housing. However, the arrangement of electronic components used in a control circuit with low heat resistance is disclosed. There is no mention of heat dissipation measures. In the configuration as in Patent Document 2 in which the power circuit unit and the control circuit unit are accommodated in one case, there is a problem that if the capacity of the rotating electrical machine is increased, further measures for heat dissipation of the control device are required. It was.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to obtain a controller-integrated rotating electrical machine that has improved cooling performance without using a heat radiating member such as a heat sink in the controller unit. Objective.

  A controller-integrated rotating electrical machine according to the present invention is a controller-integrated rotating electrical machine in which a rotating electrical machine body and a control device that controls the rotating electrical machine body are integrally formed, and the rotating electrical machine body includes a front bracket, A pair of brackets consisting of a rear bracket, a stator having a stator winding and both ends fixed to the pair of brackets, and a rotor winding having a stator winding disposed inside the stator and freely rotatable to the pair of brackets The control device includes a power circuit unit that performs power conversion between the stator winding and an external DC power source, and a control circuit unit that controls the power circuit unit. The circuit unit is configured by mounting a switching element using a semiconductor material of SiC or GaN on the substrate, the substrate of the power circuit unit is fixed in contact with the outer surface side of the rear bracket, and the power circuit is The fixed side parts to the rear bracket in which the control circuit section on the opposite side is disposed.

According to the control device-integrated rotating electrical machine of the present invention, the power circuit section constituting the control device is configured by mounting a switching element using a semiconductor material of SiC or GaN on the substrate, and the substrate side is the rear bracket. Since the control circuit part is arranged on the opposite side of the power circuit part on the side fixed to the rear bracket, it is attached directly to the bracket by using a heat-resistant switching element. In addition, since a cooling member such as a heat sink is not required for the power circuit unit, the axial length of the rotating electrical machine can be reduced. Further, by separating the control circuit unit from the power circuit unit and disposing it away from the rotating electrical machine main body, the temperature of the control circuit unit can be reduced, and parts with low heat resistance can be used.
Therefore, the rotating electrical machine can be reduced in size and weight, and the cost can be reduced.

1 is a cross-sectional view of a control device-integrated dynamoelectric machine according to Embodiment 1 of the present invention. FIG. 2 is a top view of a power circuit unit of the controller-integrated dynamoelectric machine of FIG. 1. It is a fragmentary sectional view which shows the fixing | fixed part of the power circuit part and control circuit part of the control apparatus integrated rotary electric machine by Embodiment 2 of this invention. It is a fragmentary sectional view which shows another example of the power circuit part of the control apparatus integrated rotary electric machine by Embodiment 2 of this invention, and the fixing | fixed part of a control circuit part. It is a fragmentary sectional view which shows the fixing | fixed part of the power circuit part and control circuit part of the control apparatus integrated rotary electric machine by Embodiment 3 of this invention.

Embodiment 1 FIG.
A controller-integrated dynamoelectric machine according to Embodiment 1 of the present invention will be described with reference to the drawings. In the drawings shown below, for the sake of clarity, there are portions where the scales of the respective members are different from actual ones. Further, the illustration of the configuration not directly related to the present invention is omitted.
FIG. 1 is a cross-sectional view of a controller-integrated rotating electrical machine, and shows an example of application to an AC generator motor mounted on a vehicle and used for driving assistance and power generation. FIG. 2 is a top view of the power circuit unit in FIG. 1 viewed from the rear side.

First, the overall configuration will be described with reference to FIG. In the controller-integrated rotating electrical machine 1, a rotating electrical machine main body 2 and a control device 3 are integrally formed.
The rotating electrical machine main body 2 includes a stator 5 around which the stator winding 4 is wound, and a pair of brackets that are disposed at both ends in the axial direction of the stator 5 to support the stator 5, that is, a front bracket 6 and A rear bracket 7, a rotor 9 disposed on the inner peripheral side of the stator 5 and equipped with a rotor winding 8, a rotor shaft 10 fixed to the center of the rotor 9, and the rotor shaft 10 Is provided with a front bearing 11 fixed to the front bracket 6 and a rear bearing 12 fixed to the rear bracket 7.
A cooling fan 13 and a cooling fan 14 that generate cooling air by the rotation of the rotor 9 are provided at both axial ends of the rotor 9.

A pulley 15 is attached to the tip of the rotor shaft 10 that protrudes from the front bracket 6, and a rotational position detection sensor 16 that detects the rotational state of the rotor 9 is provided at a position protruding from the other rear bracket 7. is set up.
Further, a pair of slip rings 17 for supplying a current to the rotor winding 8 are provided on the distal end side of the rotational position detection sensor 16 of the rotor shaft 10. A pair of brushes 19 that are held by the brush holder 18 and are in sliding contact with the slip ring 17 are attached to the outside of the rear bracket 7 of the rotating electrical machine body 2.

Next, the control device 3 will be described. The control device 3 includes a power circuit unit 20 electrically connected to the stator winding 4, a field circuit unit (not shown) electrically connected to the rotor winding 8, and a power circuit unit 20. And a control circuit unit 21 for controlling the field circuit unit.
FIG. 2 is a top view of the power circuit unit 20. As shown in FIG. 2, a mold-sealed switching element 31 or the like is bonded to a metal substrate 30 using a metal base by metal bonding such as solder or conductive resin. Twelve switching elements 31 necessary for the configuration of two sets of three-phase inverter circuits are mounted.
In the present application, the switching element 31 is an SiC-MOSFET made of SiC (Silicon Carbide) or a GaN-MOSFET made of GaN (Gallium-Nitride).

The metal substrate 30 includes an external battery (not shown) and power supply wiring (not shown) for electrical connection to the stator winding 4 and a control board 41 of the control circuit unit 21 to be described below. A control signal connection portion 32 for connection is provided, and these are constituted by a wiring pattern. In the control signal connection part 32, the signal wirings of the switching elements 31 are collected at one place and connected to the control board 41 of the control circuit part 21.
Although not shown, the field circuit unit is also configured on the metal substrate 30, and includes a power supply wiring for electrically connecting to the external battery and the rotor winding 8, and the control circuit unit 21. Control signal wiring for connecting to the control board 41. That is, the power circuit unit 20 of the present application also includes a field circuit unit.

A wiring case 33 is provided so as to surround the electronic component including the switching element 31 mounted on the metal substrate 30 and the control signal connection portion 32. The material of the wiring case 33 is made of thermoplastic resin such as PPS (Poly Phenylene Sulfide) or PBT (Poly Butylene Terephthalate), and the terminal of the control signal connection portion 32 is integrally formed. The wiring and the terminal of the metal substrate 30 are joined with solder, and the wiring case 33 and the metal substrate 30 are fixed with an adhesive.
Further, inside the wiring case 33, a sealing resin 34 such as epoxy is injected and sealed as a whole, but is partially shown so that the switching element 31 can be seen in the figure.
In addition, although the board | substrate of the power circuit part 20 demonstrated as the metal board | substrate 30, the material of a board | substrate is not limited to this, You may use a ceramic, a highly heat-resistant glass epoxy resin, etc.

Next, the control circuit unit 21 of the control device 3 will be described.
As shown in FIG. 1, the control circuit unit 21 houses a control board 41 inside a control circuit case 40. The control board 41 is fixed to the control circuit case 40 by screws, rivets (not shown), heat welding, or the like. As a substrate material used for the control substrate 41, a glass epoxy resin excellent in electrical characteristics and mechanical characteristics is used. The control board 41 includes an external connector (not shown) for transmitting and receiving signals between an electronic component for controlling the power circuit unit 20 and the field circuit unit (not shown) and an external device. ) Has been implemented.

The control circuit case 40 is formed of a thermoplastic resin such as PPS or PBT, and the rear side is opened after assembling. The control circuit case 40 is connected to the control signal connection portion 32 of the power circuit portion 20 on the opposite side. The part is formed. In this connection part, while being fixed to the power circuit part 20, it is attached to the rotary electric machine main body 2 by being fixed to the support | pillar part 7a provided in the rear bracket 7 with a screw.
After the connection leads of the control signal connection portion 32 and the control board 41 are soldered, the control board 41 is sealed by injecting a sealing resin 42 such as epoxy.
A cover 22 is installed on the outer surface of the control device 3 opposite to the rear bracket 7 side.

  The operation of the controller-integrated dynamoelectric machine 1 according to Embodiment 1 configured as described above will be described. The controller-integrated dynamoelectric machine 1 has a function of an electric motor as a driving assist for a vehicle and a function of a generator for power generation.

First, when functioning as driving assistance, DC power supplied from the external battery to the power circuit unit 20 is converted into a three-phase AC current by the ON / OFF control of the switching element 31 of the power circuit unit 20 and fixed. Supplied to the child winding 4. Further, the DC power supplied from the external battery is adjusted by the field circuit unit and supplied to the rotor winding 8, whereby a rotating magnetic field is generated around the rotor winding 8 and the rotor 9 rotates. It rotates with the child shaft 10. The rotation of the rotor shaft 10 is transmitted from the pulley 15 to an engine (not shown) via a transmission belt (not shown).
The control circuit unit 21 controls the power circuit unit 20 and a field circuit unit (not shown) based on information from the external device and the rotational position detection sensor 16.

On the other hand, when functioning as a generator, the rotational force of the engine is transmitted to the rotor shaft 10 via the transmission belt and the pulley 15. As a result, the rotor 9 rotates and three-phase AC power is excited in the stator winding 4.
The control circuit unit 21 controls ON / OFF of the switching element 31 of the power circuit unit 20 and converts the three-phase AC power excited by the stator winding 4 into DC power. The converted DC power is supplied to the external battery, and the battery is charged.

Next, the heat dissipation structure of the power circuit unit 20 and the control circuit unit 21 of the present embodiment will be described. Heat generated in the switching element 31 of the power circuit unit 20 is transmitted to the rear bracket 7 through the metal substrate 30 by heat conduction, and is radiated from the rear bracket 7 to the outside air by heat transfer.
As an example, if the thermal resistance from the switching element 31 to the rear bracket 7 through the metal substrate 30 is about 10 K / W and the heat generation amount of the switching element 31 is 5 W, the temperature difference between the switching element 31 and the rear bracket 7 is about 50 K. It becomes.
Further, the rear bracket 7 rises in temperature by receiving heat because the supporting stator 5 is about 200 ° C. at the maximum.

For example, when the rear bracket 7 rises to 140 ° C. due to heat received from the stator 5, the switching element 31 reaches 190 ° C.
If the switching element 31 is composed of a Si-MOSFET, the heat resistance of the Si-MOSFET is about 175 ° C. and cannot be used with the above temperature rise.
On the other hand, the switching element 31 using the SiC-MOSFET or the GaN-MOSFET of the present embodiment has a heat resistance of 200 ° C. or higher. Therefore, it can be cooled by the rear bracket 7.
As a result, there is no need to provide a heat sink for cooling the switching elements as in Patent Document 1 described in the background section, and the rotating electrical machine can be downsized.

Further, by using the metal substrate 30 based on metal for the substrate of the power circuit unit 20, heat dissipation from the substrate side to the rear bracket 7 side is promoted, and the effect of suppressing the temperature rise of the switching element 31 is enhanced. Can do.
Furthermore, since the metal substrate 30 eliminates the need for heat dissipating materials (such as grease and adhesive) for improving the cooling performance of the power circuit unit 20, the material and work process can be reduced, and the cost can be reduced. Figured.

Since the control circuit unit 21 is housed in a case different from the power circuit unit 20 and is disposed on the opposite side of the power circuit unit 20 from the fixed side to the rear bracket 7, that is, on the outside side, a gap is provided. The amount of heat generated by the electronic components mounted on the control board 41 of the control circuit unit 21 is radiated to the outside air through the sealing resin 42 and the control circuit case 40.
The temperature rise due to the amount of heat generated in the control circuit unit 21 is, for example, about 10K. However, the control circuit unit 21 is thermally connected to the rotating electrical machine main body 2 via the support column 7 a of the rear bracket 7, and the temperature of the control circuit unit 21 rises due to heat received from the stator 5. Therefore, in order to reduce the influence of heat reception, the control circuit case 40 is made of resin, and the screwed portion to the rear bracket 7 is arranged on the outer periphery of the control circuit case 40 away from the control board 41.

Further, the control circuit case 40 and the rear bracket 7 form the air passage 23 as shown by a thick arrow in FIG. 1, so that not only the rear bracket 7 but also the control circuit case 40 and the column 7a can be cooled by heat transfer. Therefore, the temperature can be reduced. For example, as a shape of the column portion 7a, by taking measures such as providing a star shape or unevenness from a cylinder or increasing the surface area such as fins, the temperature reduction of the rear bracket 7 is promoted, and the influence of heat reception of the control circuit portion 21 is reduced. it can.
As described above, the control circuit unit 21 has the arrangement position outside the power circuit unit 20, and the fixing position with the rear bracket 7 is arranged on the outer periphery of the control circuit case 40 to reduce heat reception and form the air passage 23. However, by cooling the control circuit unit 21 and reducing the temperature rise, it is possible to use inexpensive parts with low heat resistance for the electronic parts to be mounted.

Further, in order to reduce heat reception from the control signal connection portion 32 of the metal substrate 30, no low heat-resistant electronic component is disposed in the vicinity of the connection portion of the control board 41, or one terminal of the control signal connection portion 32 is provided. It is possible to prevent the control board 41 from locally becoming high temperature by dispersing it in two or more places without putting together.
In the above description, the rotating electric machine has been described as an AC generator motor that is mounted on a vehicle and used for driving assistance and power generation. However, the present invention is not limited to this.

As described above, according to the controller-integrated rotating electrical machine of the first embodiment, the controller-integrated rotating electrical machine in which the rotating electrical machine body and the control device that controls the rotating electrical machine body are integrally configured, The rotating electrical machine main body has a pair of brackets including a front bracket and a rear bracket, a stator having a stator winding and both ends fixed to the pair of brackets, and a rotor winding that is disposed inside the stator. And a rotor rotatably supported by the pair of brackets, and the control device controls a power circuit unit that performs power conversion between the stator winding and an external DC power source, and the power circuit unit. And a power circuit unit that is configured by mounting a switching element using a SiC or GaN semiconductor material on a substrate and is in contact with the outer surface side of the rear bracket. Since the control circuit part is arranged on the opposite side of the power circuit part to the rear bracket, it is attached directly to the bracket and used in the power circuit part. Since a cooling member such as a heat sink is not required, the axial length of the rotating electrical machine can be reduced. Thereby, when using for vehicle-mounted, it becomes possible to install in the limited space in an engine room.
Furthermore, by separating the control circuit unit from the power circuit unit and away from the rotating electrical machine main body, it is possible to use electronic components with low heat resistance and to reduce costs.

  Further, since the power circuit board is a metal board using a metal base, heat dissipation from the board side to the rear bracket side is promoted, and the power circuit section cooling performance can be further enhanced.

Embodiment 2. FIG.
FIG. 3 is a partial cross-sectional view showing a controller-integrated rotating electrical machine according to the second embodiment. Similar to the first embodiment, this is an example applied to an AC generator motor used for driving assistance and power generation of a vehicle, and includes a rotating electrical machine main body and a control device.
The part shown in FIG. 3 is an enlarged view of only the periphery of the fixing part that fixes the control circuit part 21 of the control device 3 to the rear bracket 7. Since the structure other than that shown in FIG. 3 is the same as that of the first embodiment, illustration and description thereof are omitted. 1 and 2 are denoted by the same reference numerals.

In the first embodiment, the control circuit case 40 of the control circuit unit 21 is fixed by the support 7a of the rear bracket 7. However, in the present embodiment, as shown in FIG. 3, a support member that fixes the control circuit case 40 43 is constituted by a member different from the rear bracket 7. The material constituting the support member 43 is a resin having low thermal conductivity.
Assembling, after fixing the support member 43 to the rear bracket 7 with the screw 44, the control circuit case 40 of the control circuit unit 21 is combined with the support member 43 and fixed with the screw 45.
The screws 44 and 45 for fixing the support member 43 and the rear bracket 7 and the support member 43 and the control circuit case 40 are separate, and heat conduction is achieved by securing the distance between the screws 44 and 45 inside the support member 43. Is prevented.

As described above, since the material of the support member 43 is made of resin having low thermal conductivity, the screw 44 side and the screw 45 side are thermally insulated by the resin of the support member 43. For this reason, since there is almost no heat reception through the screws 44 and 45, the rear bracket 7 and the control circuit case 40 can be insulated.
Since the temperature rise of the control circuit unit 21 can be suppressed by insulating the support member 43, the electronic component used for the control circuit unit 21 may be one having low heat resistance, and an inexpensive component can be used. .
Furthermore, the heat insulation effect of a control circuit part is heightened by comprising the control circuit case 40 with resin materials with low heat conductivity, such as PPS and PBT.

Next, a modification of FIG. 3 will be described.
FIG. 4 is a modified example of FIG. 3 and is a cross-sectional view showing only the periphery of the same fixed portion as that of FIG. 3 in an enlarged manner.
As shown in FIG. 4, a part of the metal substrate 30 and the wiring case 33 of the power circuit unit 20 in the case of FIG. 3 is extended in the radial direction, and the part of the wiring case 33 is further extended in the axial direction of the rotating electrical machine. Thus, the height is made substantially the same as that of the support member 43 in FIG. 3, and this portion is a screw fixing portion 33a. Since the wiring case 33 is made of resin, the screw fixing portion 33a has the function of the support member 43 shown in FIG. In other words, the function of fixing the control circuit unit 21 is concentrated on the power circuit unit 20 side. Thereby, the effect similar to FIG. 3 can be anticipated, and also the number of parts can be reduced.

As described above, according to the control apparatus-integrated dynamoelectric machine of Embodiment 2, the control circuit unit is configured by the electronic components that constitute the circuit and the control circuit case that houses the electronic components. Since it is fixed to the rear bracket via the resin support member, in addition to the effect of the first embodiment, the heat transfer between the rear bracket and the control circuit unit is suppressed to further increase the temperature of the control circuit unit. Reduction effect is increased.
As a result, it is possible to use electronic components with low heat resistance in the control circuit unit, and the cost can be reduced.

  In addition, since the control circuit case of the control circuit unit is made of a resin material having low thermal conductivity, the heat insulation effect of the control circuit unit is enhanced, and the electronic components of the control circuit unit can be replaced with electronic components with lower heat resistance. It becomes possible.

Embodiment 3 FIG.
FIG. 5 is a partial cross-sectional view showing a controller-integrated rotating electrical machine according to the third embodiment. Since the portions correspond to those in FIG. 3 of the second embodiment, the same portions are denoted by the same reference numerals, description thereof will be omitted, and differences will be mainly described. Further, the portions other than the illustration and the entire configuration of the rotating electrical machine are the same as those in FIG.
In the second embodiment, the control circuit case 40 of the control circuit unit 21 is formed of a thermoplastic resin. However, in the present embodiment, the control circuit case 46 is made of metal. Further, a metal lid 47 is provided on the surface opposite to the fixed side of the control circuit case 46. Other configurations are the same as those in FIG. 3 of the second embodiment.

In FIG. 5, since the control circuit case 46 is a metal case, a metal terminal is insert-molded and fixed with an adhesive at the connection portion with the control signal connection portion 32 (see FIGS. 1 and 2).
After the control board 41 is fixed inside the control circuit case 46 with screws or the like, it is sealed with an epoxy sealing resin 42 and further covered with a metal lid 47 from above.
As the metal material constituting the control circuit case 46, it is desirable to use aluminum or copper having high thermal conductivity. By doing so, heat dissipation is enhanced, the temperature distribution inside the control circuit unit 21 is made uniform, and the maximum temperature can be reduced. Further, heat dissipation from the control circuit case 46 to the outside air is promoted.
Further, covering the entire circumference of the control board 41 with metal by the lid 47 also serves as a noise countermeasure.

As described above, according to the control apparatus-integrated dynamoelectric machine of Embodiment 3, since the control circuit case is made of a metal material, in addition to the effects of Embodiment 1, the control circuit case is made of resin. By using a metal material with higher thermal conductivity, heat dissipation is promoted and the temperature of the control circuit section is made uniform, the maximum temperature can be reduced, and electronic components with low heat resistance can be used, thereby reducing costs. .
Further, by providing a metal lid outside the control circuit case, intrusion of noise from the outside can be prevented in addition to the above effects.

  In the present invention, within the scope of the invention, the embodiments can be freely combined, or the embodiments can be appropriately changed or omitted.

DESCRIPTION OF SYMBOLS 1 Controller-integrated rotating electrical machine, 2 Rotating electrical machine main body, 3 Controller, 4 Stator winding,
5 Stator, 6 Front bracket, 7 Rear bracket, 7a Strut,
8 Rotor winding, 9 Rotor, 10 Rotor shaft, 11 Front bearing, 12 Rear bearing,
13, 14 Cooling fan, 15 pulley, 16 rotational position detection sensor,
17 slip ring, 18 brush holder, 19 brush, 20 power circuit,
21 control circuit part, 22 cover, 23 air path, 30 metal substrate,
31 switching element, 32 control signal connection part, 33 wiring case,
33a Screw fixing portion, 34 sealing resin, 40 control circuit case, 41 control board,
42 sealing resin, 43 support member, 44, 45 screw, 46 control circuit case,
47 lid

A controller-integrated rotating electrical machine according to the present invention is a controller-integrated rotating electrical machine in which a rotating electrical machine body and a control device that controls the rotating electrical machine body are integrally formed, and the rotating electrical machine body includes a front bracket, A pair of brackets consisting of a rear bracket, a stator having a stator winding and both ends fixed to the pair of brackets, and a rotor winding having a stator winding disposed inside the stator and freely rotatable to the pair of brackets The control device includes a power circuit unit that performs power conversion between the stator winding and an external DC power source, and a control circuit unit that controls the power circuit unit. circuit unit includes a switching element SiC or GaN semiconductor material is used is constituted is mounted on the substrate, the opposite surface is the rear bracket faces the switching element is mounted in the substrate In a state of being in contact with the outer surface side, the power circuit portion is fixed to the rear bracket, the fixed side to the rear bracket of the power circuit portion in which the control circuit section on the opposite side is disposed.

According to the control device-integrated rotating electrical machine of the present invention, the power circuit section constituting the control device is configured by mounting a switching element using a semiconductor material of SiC or GaN on the substrate. The power circuit part is fixed to the rear bracket with the surface opposite to the surface where the is mounted in contact with the outer surface of the rear bracket, and the control circuit part is on the opposite side of the power circuit part to the rear bracket. Because it uses a highly heat-resistant switching element, it is directly attached to the bracket and does not require a cooling member such as a heat sink in the power circuit section, so the axial length of the rotating electrical machine is reduced. it can. Further, by separating the control circuit unit from the power circuit unit and disposing it away from the rotating electrical machine main body, the temperature of the control circuit unit can be reduced, and parts with low heat resistance can be used.
Therefore, the rotating electrical machine can be reduced in size and weight, and the cost can be reduced.

As described above, according to the controller-integrated rotating electrical machine of the first embodiment, the controller-integrated rotating electrical machine in which the rotating electrical machine body and the control device that controls the rotating electrical machine body are integrally configured, The rotating electrical machine main body has a pair of brackets including a front bracket and a rear bracket, a stator having a stator winding and both ends fixed to the pair of brackets, and a rotor winding that is disposed inside the stator. And a rotor rotatably supported by the pair of brackets, and the control device controls a power circuit unit that performs power conversion between the stator winding and an external DC power source, and the power circuit unit. and a control circuit unit, a power circuit unit includes a switching element SiC or GaN semiconductor material is used is constituted is mounted on the substrate, opposite to the surface on which the switching elements of the substrate are mounted While the surface is in contact with the outer surface of the rear bracket, the power circuit portion is fixed to the rear bracket, the control circuit section on the opposite side is disposed to the fixed side of the rear bracket of the power circuit unit, high heat By using this switching element, it is directly attached to the bracket and does not require a cooling member such as a heat sink in the power circuit portion, so that the axial length of the rotating electrical machine can be reduced. Thereby, when using for vehicle-mounted, it becomes possible to install in the limited space in an engine room.
Furthermore, by separating the control circuit unit from the power circuit unit and away from the rotating electrical machine main body, it is possible to use electronic components with low heat resistance and to reduce costs.

A controller-integrated rotating electrical machine according to the present invention is a controller-integrated rotating electrical machine in which a rotating electrical machine body and a control device that controls the rotating electrical machine body are integrally formed, and the rotating electrical machine body includes a front bracket, a pair of brackets comprising a rear bracket, a stator both ends has a stator winding is secured to a pair of brackets, are arranged inside the stator has a rotor winding rotatable pair of brackets And a cooling fan that is provided at both ends in the axial direction of the rotor and generates cooling air by the rotation of the rotor . The control device is provided between the stator winding and the external DC power source. The power circuit unit includes a power circuit unit that performs power conversion and a control circuit unit that controls the power circuit unit. The power circuit unit includes a switching element using a SiC or GaN semiconductor material mounted on a substrate. The power circuit unit is fixed to the rear bracket with the surface opposite to the surface on which the switching element of the board is mounted in contact with the outer surface side of the rear bracket, and the power circuit unit is fixed to the rear bracket. On the opposite side, a control circuit unit is arranged with a gap from the power circuit unit, and the gap serves as an air path for taking in cooling air from the outer peripheral side in the radial direction .

According to the controller-integrated rotating electrical machine of the present invention, the cooling fan that generates the cooling air is provided at both axial end portions of the rotor, and the power circuit portion that constitutes the controller is made of a semiconductor material of SiC or GaN. The power circuit unit is fixed to the rear bracket with the switching element used being mounted on the board, and the surface opposite to the surface on which the switching element is mounted is in contact with the outer surface of the rear bracket. On the opposite side of the power circuit portion from the side fixed to the rear bracket, a control circuit portion is arranged with a gap from the power circuit portion, and the gap serves as an air passage for taking in cooling air from the outer peripheral side in the radial direction. since it is, because by using a switching element having a high heat resistance, directly attached to the bracket, does not require a cooling member such as a heat sink in the power circuit portion, the rotation It can be reduced axial length of the machine. In addition, the control circuit section is separated from the power circuit section and placed away from the rotating electrical machine body , and the air path is formed, so that the temperature of the control circuit section can be reduced and parts with low heat resistance can be used. Become.
Therefore, the rotating electrical machine can be reduced in size and weight, and the cost can be reduced.

Claims (5)

A controller-integrated rotating electrical machine in which a rotating electrical machine body and a control device that controls the rotating electrical machine body are integrally configured,
The rotating electrical machine main body includes a pair of brackets including a front bracket and a rear bracket, a stator having a stator winding and both ends fixed to the pair of brackets, a rotor winding, and a stator winding. A rotor disposed on the inside and rotatably supported by the pair of brackets;
The control device includes a power circuit unit that performs power conversion between the stator winding and an external DC power source, and a control circuit unit that controls the power circuit unit,
The power circuit unit is configured by mounting a switching element using a semiconductor material of SiC or GaN on a substrate,
The board of the power circuit unit is fixed in contact with the outer surface side of the rear bracket, and the control circuit unit is disposed on the side opposite to the side of the power circuit unit fixed to the rear bracket. Control device-integrated rotating electrical machine. The controller-integrated dynamoelectric machine according to claim 1,
The controller-integrated dynamoelectric machine, wherein the substrate of the power circuit unit is a metal substrate using a metal base. The controller-integrated dynamoelectric machine according to claim 1 or 2,
The control circuit unit includes an electronic component that constitutes a circuit and a control circuit case that houses the electronic component, and the control circuit case is fixed to the rear bracket via a resin support member. A controller-integrated rotating electrical machine. The controller-integrated dynamoelectric machine according to claim 3,
The control circuit case is composed of a resin material having a low thermal conductivity, and the controller-integrated dynamoelectric machine. The controller-integrated dynamoelectric machine according to claim 3,
The control circuit case is made of a metal material, and is a controller-integrated dynamoelectric machine.

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