JP7086238B1 - Control device integrated rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an inexpensive and miniaturized rotary electric machine integrated with a control device while improving the cooling performance of the control device. SOLUTION: A rotating electric machine main body provided with a rotor, a stator, a housing, and a cooling fan fixed to an end face of a field iron core, and a plate-shaped surface on one side in the axial direction. A base arranged at intervals on the other side in the axial direction of the housing, a power circuit unit fixed to the base, a field current control circuit unit, a power control circuit unit, a base, and a field current control circuit unit. , And a housing in which the power control circuit unit is fixed, a heat dissipation member, and a power supply unit arranged at intervals on the other side in the axial direction of the housing, the housing and the power supply unit. A cooling fluid passage through which the cooling fluid passes in the radial direction is formed between the two, and the heat radiation member is thermally connected to one side of the field current control circuit portion in the axial direction and is thermally connected. It has a portion that protrudes to one side in the axial direction from the portion and is arranged in the cooling fluid passage. [Selection diagram] Fig. 1

Description

The present application relates to a rotary electric machine integrated with a control device.

The rotary electric machine for a vehicle is equipped with a control device for controlling the rotary electric machine in addition to the rotary electric machine. Rotating electric machines for vehicles are required to be space-saving and easy to mount, and to reduce the wiring harness that connects the rotating electric machine and the control device. In particular, when a rotary electric machine is installed in an automobile engine room, it is required that the rotary electric machine can be installed in a limited space. In a vehicle model in which a small amount of radial space for a rotary electric machine can be secured, there are problems that parts interfere with each other and that a work space for attaching a connector for connecting to an external device and a screw for fixing cannot be secured. In the worst case, the rotary electric machine may not fit in the space and the rotary electric machine cannot be installed. In this way, the layout in the engine room restricts the installation of rotary electric machines. Therefore, a controller-integrated rotary electric machine, which is a mechanical-electrical integrated rotary electric machine in which a rotary electric machine and a control device are integrated, has been developed.

In the control device integrated rotary electric machine, a technique is disclosed in which the rotary electric machine and the control device are cooled by the cooling air generated by the rotation of the fan of the rotary electric machine (see, for example, Patent Document 1). The control device includes an inverter circuit, a field circuit, and a control circuit that supply electric power to the rotary electric machine. The control device is provided with a heat sink, which is a circular heat sink, and a substrate on which an inverter circuit, a field circuit, and a control circuit are mounted is fixed to the heat sink. The cooling air generated by the rotation of the cooling fan passes between the fins of the heat sink to cool the control device.

JP-A-2015-224044

In Patent Document 1, since the control device includes a heat radiating plate to which a substrate on which heat generation is a concern is fixed, the control device can be cooled by cooling air. However, since the heat dissipation member on which the inverter circuit is mounted and the heat dissipation member on which the field circuit is mounted are the same, there is a problem that the heat generated in each circuit interferes and the cooling efficiency of the control device is lowered. there were. In order to ensure the cooling performance, it is necessary to increase the air volume of the cooling fan. If the size of the cooling fan is increased in order to increase the air volume of the cooling fan, there is a problem that the noise of the cooling fan is increased and the size of the rotary electric machine integrated with the control device is increased. Further, since the heat radiation member of the inverter circuit and the field circuit are the same, the number of places where the parts are not mounted in the heat radiation member increases, so that there is a problem that the rotary electric machine integrated with the control device becomes large.

Further, in a rotary electric machine with an integrated control device mounted on an HV (Hybrid Vehicle) or the like, high cooling performance is required. When the temperature rise of the controller-integrated rotary electric machine is large, it becomes necessary to reduce the current density of the control device-integrated rotary electric machine, so that the performance of the control device-integrated rotary electric machine deteriorates. In order to avoid such deterioration of the performance of the controller-integrated rotary electric machine, parts with high heat resistance are used for the control device-integrated rotary electric machine, so that the cost of the control device-integrated rotary electric machine increases. There was a challenge.

Therefore, an object of the present application is to obtain an inexpensive and miniaturized rotary electric machine integrated with a control device while improving the cooling performance of the control device.

The controller-integrated rotary electric machine disclosed in the present application has a field iron core wound with a field winding, and is arranged and fixed to a rotor that rotates integrally with a rotating shaft and a rotor that is radially outside. A stator with a stator core wound with child windings, a housing that covers the outside of the field core and the stator core, and holds one end and the other end of the rotating shaft via a bearing, and a field magnet. It is formed in a plate shape with a rotating electric machine main body provided with a cooling fan fixed to the other end surface of the iron core in the axial direction, and one surface in the axial direction is spaced from the other side in the axial direction of the housing. A power circuit unit that has a base arranged in a row and a switching element that turns the supply current to the stator winding on and off, and one surface in the axial direction is fixed to the base, and the supply current to the field winding. The field current control circuit unit that controls the field, the power control circuit unit that controls the power circuit unit, the housing in which the base, the field current control circuit unit, and the power control circuit unit are fixed, and the field current control circuit. A heat radiating member thermally connected to the portion is provided, and a power supply unit is provided on the other side in the axial direction of the housing at intervals, and a cooling fan is provided between the housing and the power supply unit. A cooling fluid passage is formed through which the cooling fluid generated by the rotation of the field passes in the radial direction, and the heat dissipation member is thermally connected to one side of the field current control circuit in the axial direction and is thermally connected. It has a portion that protrudes to one side in the axial direction from the connected portion and is arranged in the cooling fluid passage, and the heat radiating member is fixed to the housing .

According to the controller-integrated rotary electric machine disclosed in the present application, the cooling fluid generated by the rotation of the cooling fan passes in the radial direction between the housing of the rotary electric machine main body and the power supply unit which is the control device. In the base where the cooling fluid passage is formed and the power circuit part of the power supply unit is fixed, one surface in the axial direction is spaced apart from the other side in the axial direction of the housing, and field current control is performed. Since the heat dissipation member thermally connected to one side of the circuit portion in the axial direction has a portion that protrudes to one side in the axial direction from the thermally connected portion and is arranged in the cooling fluid passage. Since the heat radiating member does not transfer heat from the power circuit portion and is exposed to the cooling fluid passage, the cooling performance of the power supply unit can be improved. Further, since the cooling performance of the power supply unit can be improved, it is not necessary to use parts having high heat resistance for the rotary electric machine with integrated control device, so that the rotary electric machine with integrated control device can be inexpensive. In addition, since the field current control circuit section, which requires cooling, is provided with a heat dissipation member, there is no place where parts are not mounted on the heat dissipation member, and the volume of the power supply unit is reduced. The electric power can be miniaturized.

It is sectional drawing which shows the outline of the control device integrated rotary electric machine which concerns on Embodiment 1. FIG. It is a top view which shows the other side in the axial direction of the base of the control device integrated rotary electric machine and the heat dissipation member which concerns on Embodiment 1. FIG. It is sectional drawing of the heat radiation member cut at the cross-sectional position AA of FIG. It is sectional drawing of another heat dissipation member cut at the cross-sectional position AA of FIG. It is sectional drawing which shows the outline of the control device integrated rotary electric machine which concerns on Embodiment 2. FIG. It is sectional drawing which shows the outline of the control device integrated rotary electric machine which concerns on Embodiment 3. FIG. It is sectional drawing which shows the outline of the control device integrated rotary electric machine which concerns on Embodiment 4. FIG. It is sectional drawing which shows the outline of the control device integrated rotary electric machine which concerns on Embodiment 5. It is sectional drawing which shows the outline of the control device integrated rotary electric machine which concerns on Embodiment 6. It is a top view which shows the other side in the axial direction of the base of the control device integrated rotary electric machine and the heat dissipation member which concerns on Embodiment 6.

Hereinafter, the rotary electric machine according to the embodiment of the present application will be described with reference to the drawings. In each figure, the same or corresponding members and parts will be described with the same reference numerals. In the illustrations between the figures, the sizes and scales of the corresponding components are independent of each other.

Embodiment 1.
FIG. 1 is a cross-sectional view showing an outline of the controller-integrated rotary electric machine 100 according to the first embodiment, and FIG. 2 is a plan view showing the other side of the base 11 of the control device-integrated rotary electric machine 100 and the heat radiating member 17 in the axial direction. 3 is a cross-sectional view of the heat radiating member 17 cut at the AA cross-sectional position of FIG. 2, and FIG. 4 is a cross-sectional view of another heat radiating member 17 cut at the AA cross-sectional position of FIG. The control device integrated rotary electric machine 100 is a control device integrated rotary electric machine including a rotary electric machine 200 which is a rotary electric machine main body and a power supply unit 300 which is a control device. The rotary electric machine 200 has a rotor 6 and a stator 5, and operates as an electric motor for driving an engine (not shown) which is a load. Alternatively, the rotary electric machine 200 functions as a generator that is driven by an engine to generate electricity. The power supply unit 300 is arranged at intervals on the other side of the housing 3 of the rotary electric machine 200 in the axial direction, and controls the electric power supplied to the rotary electric machine 200. The power supply unit 300 is fixed to the rotary electric machine 200, and the rotary electric machine 200 and the power supply unit 300 are integrated.

<Rotating electric machine 200>
As shown in FIG. 1, the rotary electric machine 200 accommodates a rotor 6 that rotates integrally with a shaft 4 that is a rotation shaft, a stator 5 that is arranged outside the rotor 6, and rotates the shaft 4. It is provided with a housing 3 that can be freely held.

The rotor 6 has a field winding 6b and a field iron core 6a around which the field winding 6b is wound. The stator 5 arranged radially outside the field core 6a has a stator winding 5b having a plurality of phases and a stator core 5a around which the stator winding 5b is wound. The multi-phase stator winding 5b is, for example, one set of three-phase windings or two sets of three-phase windings, but is not limited thereto, and is set according to the type of rotary electric machine. The housing 3 covers the outside of the field core 6a and the stator core 5a.

The housing 3 includes a front bracket 1 provided on the load side and a rear bracket 2 provided on the non-load side. The front bracket 1 holds one end side of the shaft 4 via the bearing 7a and covers the front side which is one side of the rotor 6 and the stator 5. The rear bracket 2 holds the other end side of the shaft 4 via the bearing 7b and covers the rear side which is the other side of the rotor 6 and the stator 5. The stator 5 is fixed to the front bracket 1 and the rear bracket 2. The rear bracket 2 includes an intake port 2a that penetrates the wall on the other side in the axial direction of the rear bracket 2, and an exhaust port 2b that penetrates the wall on the radial side surface of the rear bracket 2. The front bracket 1 and the rear bracket 2 are arranged at intervals in the axial direction and are connected by bolts (not shown).

The shaft 4 includes a pulley 9 at one end of the shaft 4 protruding from the through hole of the front bracket 1. The pulley 9 and the rotation shaft of the engine are connected via a belt (not shown), and the pulley 9 transmits rotational energy to the engine.

The cooling fan 8a is fixed to the end surface on the front side, which is one side in the axial direction of the field iron core 6a of the rotor 6. The cooling fan 8b is fixed to the end face on the rear side, which is the other side in the axial direction of the field core 6a of the rotor 6. The cooling fan 8a and the cooling fan 8b rotate integrally with the rotor 6. As the cooling fan 8b rotates, cooling air W1 which is a cooling fluid is generated. A cooling fluid passage 50 through which the cooling air W1 passes in the radial direction is formed between the housing 3 and the power supply unit 300.

<Power supply unit 300>
The power supply unit 300 includes a base 11, a power circuit unit 13 in which one surface in the axial direction is fixed to the base, and a field current control circuit unit 15 that controls the supply current to the field winding 6b. The power control circuit unit 14 that controls the power circuit unit 13, the housing 12 to which the base 11, the field current control circuit unit 15, and the power control circuit unit 14 are fixed, and the field current control circuit unit 15 are thermally connected. The heat radiating member 17 connected to the above is provided.

The power circuit unit 13 includes a switching element for turning on / off the supply current to the stator winding and a peripheral circuit. The switching element is arranged, for example, on a lead frame forming an electric wiring, and is sealed with a resin material together with a peripheral circuit. The control terminal 13a of the power circuit unit 13 is connected to the power control circuit unit 14. The power control circuit unit 14 controls a switching element that transfers DC power of a battery (not shown) and AC power of the stator winding 5b of the rotary electric machine 200. The power control circuit unit 14 is formed by mounting the element 16 on the substrate 14a. The field current control circuit unit 15 is formed by mounting the element 16 on the substrate 15a. The element 16 generates heat during control drive. For the element 16, for example, a transistor, a resistor, a capacitor, a microcomputer, and an ASIC (application specific integrated circuit) are used.

The base 11 is formed in a plate shape, and one surface in the axial direction is spaced apart from the other side in the axial direction of the housing. The base 11 is formed by using, for example, a cast metal product such as an aluminum alloy or a copper alloy, or a sheet metal member. The base 11 is fixed to the rear bracket 2 at a fixing portion (not shown). The base 11 has a role of dissipating heat generated when a current flows through the power supply unit 300 to the outside. The base 11 may be provided with fins 11a on one surface in the axial direction. By providing the fins 11a, the heat dissipation of the base 11 can be improved.

The heat radiating member 17 is thermally connected to one side portion in the axial direction of the field current control circuit unit 15, projects to one side in the axial direction from the thermally connected portion, and is arranged in the cooling fluid passage 50. Has a part that has been The heat radiating member 17 has radiating fins 17a in a portion arranged in the cooling fluid passage 50. As shown in FIG. 3, the heat radiating fins 17a are provided with a plurality of heat radiating fins 17a projecting on one side in the axial direction in the circumferential direction. The configuration of the heat radiating fins 17a is not limited to this, and as shown in FIG. 4, a plurality of heat radiating fins 17a protruding in the circumferential direction may be provided in the axial direction. Although the configuration including four heat radiation fins 17a is shown in FIGS. 3 and 4, the number of heat radiation fins 17a is not limited to this. The heat radiating member 17 is formed by using, for example, a metal casting such as an aluminum alloy or a copper alloy, or a sheet metal member.

As shown in FIG. 2, the base 11 and the heat radiating member 17 are projected in the axial direction and do not overlap. The base 11 is arranged at positions in the circumferential direction and the radial direction different from the heat radiating member 17, and is exposed to the cooling fluid passage 50. By arranging the base 11 and the heat radiating member 17 in this way, the size of the power supply unit 300 in the radial direction and the circumferential direction can be reduced. In the present embodiment, the heat radiating member 17 is provided at one place in the circumferential direction, and the base 11 is formed in a disk shape in which at least the portion where the heat radiating member 17 is arranged is cut out, and one of the axial directions of the base 11 is formed. The side surface is exposed to the cooling fluid passage 50. With such a configuration, the base 11 can be moved not only in the axial direction but also in the radial direction to assemble the control device integrated rotary electric machine 100, so that the workability in assembly can be improved. Further, the base 11 is formed in a disk shape in which the axial center portion 4a is cut out in addition to the portion in the circumferential direction in which the heat radiating member 17 is arranged. With this configuration, even if the shaft 4 penetrates the base 11, the base 11 can be moved not only in the axial direction but also in the radial direction to assemble the control device integrated rotary electric machine 100. Workability can be improved. Further, the control device integrated rotary electric machine 100 can be miniaturized without increasing the size in the axial direction.

In FIG. 2, the six square portions shown on the base 11 indicate an arrangement portion 11b in which the power circuit portion 13 is arranged. The arrangement portion 11b is provided so as to project to the other side in the axial direction. With such a configuration, when the power circuit unit 13 is arranged on the base 11, the power circuit unit 13 can be easily positioned, so that the workability in assembling the control device integrated rotary electric machine 100 can be improved. .. The configuration of the arrangement portion 11b is not limited to this, and the arrangement portion 11b may be flush with other portions.

As shown in FIG. 1, the housing 12 has a plate-shaped bottom portion 12a extending in the radial and circumferential directions, and a plate-shaped bottom portion 12a projecting from the bottom portion 12a to the other side in the axial direction, and the field current control circuit portion 15 is axially oriented. It has a field support portion 12b that supports from one side, and a power support portion 12c that projects from the bottom portion 12a to the other side in the axial direction and supports the power control circuit unit 14 from one side in the axial direction. With this configuration, it is possible to increase the locations of the field current control circuit unit 15 and the power control circuit unit 14 that are exposed to the outside air, so that the heat dissipation of the field current control circuit unit 15 and the power control circuit unit 14 can be increased. Can be promoted. The housing 12 further includes a power circuit unit 13, a power control circuit unit 14, and a side wall portion 12d surrounding the field current control circuit unit 15 from the outside in the radial direction. The housing 12 is made of, for example, a resin material having an insulating property. The resin material is, for example, polyphenylene sulfide. A through hole 12e through which the heat radiation member 17 penetrates is formed in a portion of the bottom portion 12a facing the one side in the axial direction of the field current control circuit portion 15. The configuration of the housing 12 is not limited to this, and may be, for example, a configuration in which it is formed in a bottomed cylindrical shape and has a power control circuit unit 14 and a field current control circuit unit 15 at the bottom.

<Cooling air W1>
As shown by the arrow in FIG. 2, the cooling air W1 is sucked into the cooling fluid passage 50 from the radial outside of the rotary electric machine integrated with the control device 100. The cooling air W1 passes radially through the fins 11a and the heat radiating fins 17a arranged in the cooling fluid passage 50, is bent in the axial direction, and enters the intake port 2a. The cooling air W1 passes through the inside of the rear bracket 2 and is discharged from the exhaust port 2b. Since the cooling air W1 passes through the fins 11a in the radial direction, the switching element of the power circuit unit 13 is cooled via the base 11 having the fins 11a. Since the cooling air W1 passes through the heat radiation fins 17a in the radial direction, the field current control circuit unit 15 is cooled via the heat radiation fins 17a. Since the cooling air W1 passes through the inside of the rear bracket 2, the stator 5 fixed to the rear bracket 2 is cooled together with the rear bracket 2.

Since the fins 11a and the heat radiation fins 17a are provided on the base 11 and the heat radiation member 17, which are separate members, the heat radiation member 17 does not transfer heat from the power circuit unit 13, and the field current control circuit unit does not receive heat. The cooling performance of 15 can be improved. Similarly, the base 11 does not transfer heat from the field current control circuit unit 15, and the cooling performance of the power circuit unit 13 can be improved. Since the cooling performance of the power supply unit 300 having the field current control circuit unit 15 and the power circuit unit 13 can be improved, it is not necessary to use parts having high heat resistance for the control device integrated rotary electric machine 100. The control device integrated rotary electric machine 100 can be made inexpensive. Further, since the heat radiating member 17 is provided at the place where cooling is required, there is no place where the parts are not mounted on the heat radiating member 17, and the volume of the power supply unit 300 is reduced. can do.

Since the cooling fluid passage 50 provided with the fins 11a and the cooling fluid passage 50 provided with the heat radiation fins 17a are at the same axial position between the housing 3 and the power supply unit 300, the rotary electric machine 100 with integrated control device 100. Can reduce the size of the controller-integrated rotary electric machine 100 without increasing the size in the axial direction. Further, since the fins 11a and the heat radiation fins 17a can be sufficiently exposed in the cooling fluid passage 50, the cooling performance of the power circuit unit 13 and the field current control circuit unit 15 can be improved. In this embodiment, the cooling method of air cooling by the cooling air W1 is described, but the cooling fluid is not limited to the cooling air W1 and may be a medium other than air (for example, cooling water). do not have.

As described above, in the control device integrated rotary electric machine 100 according to the first embodiment, the cooling air W1 generated by the rotation of the cooling fan 8b between the housing 3 of the rotary electric machine 200 and the power supply unit 300 has a diameter. In the base 11 to which the cooling fluid passage 50 passing in the direction is formed and the power circuit portion 13 of the power supply unit 300 is fixed, one surface in the axial direction is spaced from the other side in the axial direction of the housing 3. The heat radiating member 17 which is arranged apart and thermally connected to one side portion in the axial direction of the field current control circuit unit 15 protrudes to one side in the axial direction from the thermally connected portion and is cooled. Since the heat radiating member 17 does not transfer heat from the power circuit unit 13 and is exposed to the cooling fluid passage 50 because it has a portion arranged in the fluid passage 50, the cooling performance of the power supply unit 300 can be improved. can. Further, since the cooling performance of the power supply unit 300 can be improved, it is not necessary to use parts having high heat resistance for the control device integrated rotary electric machine 100, so that the control device integrated rotary electric machine 100 can be made inexpensive. Can be done. Further, since the heat dissipation member 17 is provided in the field current control circuit unit 15 which is a place where cooling is required, there is no place where the parts are not mounted on the heat dissipation member 17, and the volume of the power supply unit 300 is reduced. The device-integrated rotary electric machine 100 can be miniaturized.

When the base 11 is arranged at positions in the circumferential direction and the radial direction different from the heat dissipation member 17 and is exposed to the cooling fluid passage 50, the size of the power supply unit 300 in the radial direction and the radial direction can be reduced. .. Further, the heat radiating member 17 is provided at one place in the circumferential direction, and the base 11 is formed in a disk shape in which at least the portion where the heat radiating member 17 is arranged is cut out, and one surface of the base 11 in the axial direction is formed. When exposed to the cooling fluid passage 50, the base 11 can be moved not only in the axial direction but also in the radial direction to assemble the control device integrated rotary electric machine 100, so that the workability in assembly can be improved. .. Further, when the base 11 is formed in a disk shape in which the axial center portion 4a is cut out in addition to the portion in the circumferential direction in which the heat radiation member 17 is arranged, the shaft 4 is configured to penetrate the base 11. Further, since the base 11 can be moved not only in the axial direction but also in the radial direction to assemble the control device integrated rotary electric machine 100, the workability in the assembly can be improved.

Embodiment 2.
The control device integrated rotary electric machine 100 according to the second embodiment will be described. FIG. 5 is a cross-sectional view showing an outline of the controller-integrated rotary electric machine 100 according to the second embodiment. The controller-integrated rotary electric machine 100 according to the second embodiment has a configuration in which a heat radiating member 17 is fixed to a housing 12.

The heat radiating member 17 is fixed to the housing 12. In the present embodiment, the edge portion of the through hole 12e of the housing 12 supports the heat radiation member 17 from one side in the axial direction, and the field current control circuit unit 15 supports the heat radiation member 17 from the other side in the axial direction. ing. Since the housing 12 is made of a resin material, the housing 12 and the heat radiating member 17 are not thermally connected. The configuration in which the heat radiating member 17 is fixed to the housing 12 is not limited to this, and a configuration in which the field support portion 12b and the side surface of the radiating member 17 are connected by, for example, screwing may be used.

A heat transfer member 18 is arranged between the heat radiation member 17 and the field current control circuit unit 15. The heat transfer member 18 is, for example, a heat dissipation sheet or a heat dissipation compound. Further, the heat transfer member 18 may be a sealing material when the inside of the housing 12 is sealed with a sealing material.

As described above, in the control device integrated rotary electric machine 100 according to the second embodiment, the heat radiation member 17 is not fixed only to the field current control circuit unit 15, but the heat radiation member 17 is fixed to the housing 12. Therefore, since the stress caused by the heat radiation member 17 does not occur in the field current control circuit unit 15, the field current control circuit unit 15 does not cause any trouble due to the stress, and the control device integrated rotary electric machine 100 has the heat radiation member. 17 can be stably held. When the edge of the through hole 12e of the housing 12 supports the heat radiating member 17 from one side in the axial direction, it is not necessary to newly provide a member for fixing the radiating member 17 to the housing 12, so that the heat is radiated easily and inexpensively. The member 17 can be fixed to the housing 12.

When the heat transfer member 18 is arranged between the heat radiation member 17 and the field current control circuit unit 15, the heat transfer member 17 and the field current control circuit unit 15 are thermally connected to each other via the heat transfer member 18. Therefore, the cooling performance of the field current control circuit unit 15 can be improved. When the heat transfer member 18 is a heat dissipation sheet, the thermal conductivity between the heat transfer member 17 and the field current control circuit unit 15 can be improved, so that the cooling performance of the field current control circuit unit 15 is further improved. Can be made to.

Embodiment 3.
The control device integrated rotary electric machine 100 according to the third embodiment will be described. FIG. 6 is a cross-sectional view showing an outline of the controller-integrated rotary electric machine 100 according to the third embodiment. The control device integrated rotary electric machine 100 according to the third embodiment has a configuration in which the power control circuit unit 14 and the field current control circuit unit 15 are formed on the same substrate 25.

The power control circuit unit 14 and the field current control circuit unit 15 are formed on the same substrate 25, and the substrate 25 is fixed to the housing 12. The portion constituting the power control circuit portion 14 of the substrate 25 is supported by the power support portion 12c. The portion constituting the field current control circuit portion 15 of the substrate 25 is supported by the field support portion 12b.

As described above, in the control device integrated rotary electric machine 100 according to the third embodiment, the power control circuit unit 14 and the field current control circuit unit 15 are formed on the same substrate 25, so that the number of substrates can be reduced. Therefore, the rotary electric machine 100 with an integrated control device can be easily assembled at low cost. Further, since the area of the substrate on which the power control circuit unit 14 and the field current control circuit unit 15 are formed is expanded, the cooling performance of the power control circuit unit 14 and the field current control circuit unit 15 can be improved. .. Further, since the axial size of the heat radiating member 17 can be increased as compared with the first embodiment without increasing the size of the rotary electric machine 100 integrated with the control device in the axial direction, the surface area of the heat radiating fin 17a is increased. Since it is expanded, the cooling performance of the field current control circuit unit 15 can be improved.

Embodiment 4.
The control device integrated rotary electric machine 100 according to the fourth embodiment will be described. FIG. 7 is a cross-sectional view showing an outline of the controller-integrated rotary electric machine 100 according to the fourth embodiment. The controller-integrated rotary electric machine 100 according to the fourth embodiment is configured to include a brush 19 having a portion arranged in the cooling fluid passage 50.

The controller-integrated rotary electric machine 100 includes a brush 19 that is electrically connected to the field current control circuit unit 15 and supplies a current to the field winding 6b. In FIG. 7, the connection portion between the brush 19 and the field current control circuit unit 15 is omitted. The brush 19 has a portion arranged in the cooling fluid passage 50. The shaft 4 is provided with a slip ring 20 on the other end side of the shaft 4 protruding from the rear bracket 2. The slip ring 20 and the field winding 6b are electrically connected, and a field current is supplied from the slip ring 20 to the field winding 6b. The brush 19 slides a slip ring 20 to supply a current to the field winding 6b. The brush 19 is held, for example, in a brush holder (not shown) and fixed to the power supply unit 300. The brush 19 is a member that generates heat when an electric current is supplied. In the present embodiment, the brush 19 is arranged at the same position in the circumferential direction as the heat radiating member 17.

As described above, in the control device integrated rotary electric machine 100 according to the fourth embodiment, since the brush 19 for supplying the current to the field winding 6b has a portion arranged in the cooling fluid passage 50, the cooling fluid passage 50 is provided. Since the brush 19 is cooled by the cooling air W1 passing in the radial direction, the cooling performance of the brush 19 can be improved. Since the cooling performance of the brush 19 is improved, the cooling performance of the power supply unit 300 to which the brush 19 is fixed can be improved. Further, when the brush 19 is arranged at the same circumferential position as the heat radiating member 17, the distance between the field current control circuit unit 15 thermally connected to the heat radiating member 17 and the brush 19 is shortened, so that the brush 19 is used. The connection portion between the field current control circuit unit 15 and the field current control circuit unit 15 can be shortened. Since the connection portion is shortened, the number of heat-generating parts is reduced, so that the cooling performance of the power supply unit 300 can be improved. Since the connection portion is shortened, the amount of wiring member used in the connection portion is reduced and the wiring member does not need to be routed, so that the rotary electric machine 100 with an integrated control device can be easily assembled at low cost.

Embodiment 5.
The control device integrated rotary electric machine 100 according to the fifth embodiment will be described. FIG. 8 is a cross-sectional view showing an outline of the controller-integrated rotary electric machine 100 according to the fifth embodiment. The controller-integrated rotary electric machine 100 according to the fifth embodiment has a configuration in which the heat radiating member 17 and the brush 19 are thermally connected.

The brush 19 is arranged at a position in the same circumferential direction as the heat radiating member 17. The brush 19 includes an inner portion 19a arranged radially inside the heat radiating member 17 and a radial extending portion 19b extending radially outward from the inner portion 19a toward one side in the axial direction of the heat radiating member 17. Have. One axial portion of the heat radiating member 17 and the other axially extending portion of the radial extension 19b are thermally connected. In the present embodiment, the base 11 is formed in a disk shape in which a peripheral portion in which the heat radiation member 17 is arranged and an axial center portion 4a are cut out, and the inner portion 19a of the brush 19 is a notch in the base 11. It is arranged inside the heat radiating member 17 in the radial direction of the portion. With this configuration, the rotary electric machine 100 with integrated control device can be miniaturized in the axial direction.

The control device integrated rotary electric machine 100 includes a rotation sensor (not shown). The rotation sensor is fixed to, for example, the bottom portion 12a of the housing 12. The shaft 4 is provided with a rotation sensor magnet 24 on the other end side of the shaft 4 protruding from the rear bracket 2. The rotation sensor magnet 24 rotates integrally with the shaft 4. The rotation sensor detects the position of the magnetic pole of the shaft 4, that is, the rotor 6 from the position of the magnetic pole of the magnet 24 for the rotation sensor. The signal wiring of the rotation sensor is connected to the power control circuit unit 14. The rotation sensor magnet 24 is a member that becomes hot because the heat generated by the rotor 6 and the heat generated by the sliding portion between the shaft 4 and the bearing 7b are transmitted via the shaft 4.

As described above, in the control device integrated rotary electric machine 100 according to the fifth embodiment, the portion on one side in the axial direction of the heat radiating member 17 and the portion on the other side in the axial direction of the radial extension portion 19b in the brush 19. Is thermally connected, the brush 19 is cooled by the heat radiating member 17, so that the cooling performance of the brush 19 can be improved. Since the cooling performance of the brush 19 is improved, the cooling performance of the power supply unit 300 to which the brush 19 is fixed can be improved. Further, since the cooling air W1 that has passed through the portion between the inner portion 19a of the brush 19 and the housing 12 reaches the rotation sensor magnet 24, the cooling performance of the rotation sensor magnet 24 can be improved. Since the rotation sensor magnet 24 does not deteriorate due to heat, the performance of the rotation sensor can be maintained. Further, since the cooling air W1 reaches the sliding portion between the brush 19 and the slip ring 20, the cooling performance of the brush 19 can be further improved.

Embodiment 6.
The control device integrated rotary electric machine 100 according to the sixth embodiment will be described. FIG. 9 is a cross-sectional view showing an outline of the controller-integrated rotary electric machine 100 according to the sixth embodiment, and FIG. 10 is a plan view showing the other side of the base 11 of the control device-integrated rotary electric machine 100 and the heat radiating member 17 in the axial direction. Is. The controller-integrated rotary electric machine 100 according to the sixth embodiment has a structure in which the base 11 is cut out from the portion where the heat radiating member 17 is arranged.

As shown in FIG. 10, the base 11 and the heat radiating member 17 are projected in the axial direction and do not overlap. The base 11 is formed in a disk shape in which a portion in which the heat radiating member 17 is arranged and an axial center portion 4a are cut out. The notch portion through which the heat radiating member 17 penetrates the base 11 is a through hole 21. The intermediate portion 11c of the base 11 between the through hole 21 in which the heat radiating member 17 is arranged and the notch portion of the axial center portion 4a is arranged on one side in the axial direction with a distance from the housing 12. .. The cooling air W1 passes through the space 22 between the base 11 and the housing 12 which is the interval. The radial outer surface of the intermediate portion 11c of the base 11 is inclined to move inward in the radial direction as it moves to the other side in the axial direction. The radial inner surface of the radial outer portion of the through hole 21 in which the heat dissipation member 17 is arranged in the base 11 is inclined so as to move inward as it moves to the other side in the axial direction. is doing. These inclined surfaces 23 are provided to facilitate the flow of the cooling air W1 in the space 22.

As described above, in the control device integrated rotary electric machine 100 according to the sixth embodiment, the base 11 is formed in a disk shape in which the portion where the heat dissipation member 17 is arranged is cut out, so that the diameter of the power supply unit 300 is large. The size in the direction and the circumferential direction can be reduced. Further, since the heat radiation fins 17a can be sufficiently exposed in the cooling fluid passage 50, the cooling performance of the field current control circuit unit 15 can be improved. Since the base 11 is formed in a disk shape with the axial center portion 4a cut out, the control device integrated rotary electric machine 100 does not increase in size in the axial direction even when the shaft 4 penetrates the base 11. , The control device integrated rotary electric machine 100 can be miniaturized.

Further, the intermediate portion 11c of the base 11 between the through hole 21 in which the heat radiating member 17 is arranged and the notch portion of the axial center portion 4a is arranged on one side in the axial direction from the housing 12. If this is the case, the cooling air W1 passes through the space 22 between the base 11 and the housing 12 at the interval and reaches the rotation sensor magnet 24, so that the cooling performance of the rotation sensor magnet 24 is improved. Can be done. Since the cooling air W1 reaches the sliding portion between the brush 19 and the slip ring 20, the cooling performance of the brush 19 can be further improved. Further, the radial outer surface of the intermediate portion 11c is inclined so as to move inward in the radial direction as it moves to the other side in the axial direction, and the through hole 21 in the base 11 in which the heat radiation member 17 is arranged is arranged. When the inner surface of the radial outer portion is inclined so as to move inward in the radial direction as it moves to the other side in the axial direction, the cooling air W1 tends to flow in the space 22. Therefore, the cooling performance of the rotation sensor magnet 24 can be further improved.

The present application also describes various exemplary embodiments and examples, although the various features, embodiments, and functions described in one or more embodiments are those of a particular embodiment. It is not limited to application, but can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not exemplified are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1 Front bracket, 2 Rear bracket, 2a Intake port, 2b Exhaust port, 3 Housing, 4 Shaft, 4a Axis core, 5 Stator, 5a Stator core, 5b Stator winding, 6 Rotor, 6a Field core , 6b field winding, 7a bearing, 7b bearing, 8a cooling fan, 8b cooling fan, 9 pulley, 11 base, 11a fin, 11b placement part, 11c middle part, 12 housing, 12a bottom, 12b field support part , 12c power support, 12d side wall, 12e through hole, 13 power circuit, 13a control terminal, 14 power control circuit, 14a board, 15 field current control circuit, 15a board, 16 elements, 17 heat dissipation member, 17a radiating fin, 18 heat transfer member, 19 brush, 19a inner part, 19b radial extension, 20 slip ring, 21 through hole, 22 space, 23 inclined surface, 24 rotation sensor magnet, 25 substrate, 50 cooling fluid Passage, 100 controller integrated rotary electric machine, 200 rotary electric machine, 300 power supply unit, W1 cooling air

Claims (15)

A stator core having a field core wound with a field winding and rotating integrally with a rotating shaft, and a stator core arranged radially outside the rotor and having a stator winding wound around it. A stator having a stator, a housing that covers the outside of the field core and the stator core, and holds one end side and the other end side of the rotating shaft via a bearing, and the other side of the field core in the axial direction. A rotating electric machine main body provided with a cooling fan fixed to the end face,
It has a base formed in a plate shape and one surface in the axial direction is spaced apart from the other side in the axial direction of the housing, and a switching element for turning on / off the supply current to the stator winding. , A power circuit unit whose one surface in the axial direction is fixed to the base, a field current control circuit unit that controls the supply current to the field winding, and a power control circuit that controls the power circuit unit. A unit, a housing to which the base, the field current control circuit unit, and the power control circuit unit are fixed, and a heat dissipation member thermally connected to the field current control circuit unit are provided. A power supply unit, which is spaced apart from the other side of the housing in the axial direction, is provided.
A cooling fluid passage is formed between the housing and the power supply unit through which the cooling fluid generated by the rotation of the cooling fan passes in the radial direction.
The heat radiating member is thermally connected to one side portion in the axial direction of the field current control circuit portion, protrudes to one side in the axial direction from the thermally connected portion, and is arranged in the cooling fluid passage. Has a part that has been
A rotary electric machine integrated with a control device in which the heat radiating member is fixed to the housing . The housing has a plate-shaped bottom extending in the radial and circumferential directions, and a field support that projects from the bottom to the other side in the axial direction and supports the field current control circuit unit from one side in the axial direction. With a part,
A through hole through which the heat dissipation member penetrates is formed in a portion of the bottom portion facing one side in the axial direction of the field current control circuit portion.
The first aspect of claim 1 , wherein the edge portion of the through hole supports the heat radiating member from one side in the axial direction, and the field current control circuit unit supports the heat radiating member from the other side in the axial direction. Control device integrated rotary electric machine. The controller-integrated rotary electric machine according to claim 1 or 2 , wherein a heat transfer member is arranged between the heat radiation member and the field current control circuit unit. The controller-integrated rotary electric machine according to claim 3 , wherein the heat transfer member is a heat dissipation sheet. A stator core having a field core wound with a field winding and rotating integrally with a rotating shaft, and a stator core arranged radially outside the rotor and having a stator winding wound around it. A stator having a stator, a housing that covers the outside of the field core and the stator core, and holds one end side and the other end side of the rotating shaft via a bearing, and the other side of the field core in the axial direction. A rotating electric machine main body provided with a cooling fan fixed to the end face,
It has a base formed in a plate shape and one surface in the axial direction is spaced apart from the other side in the axial direction of the housing, and a switching element for turning on / off the supply current to the stator winding. , A power circuit unit whose one surface in the axial direction is fixed to the base, a field current control circuit unit that controls the supply current to the field winding, and a power control circuit that controls the power circuit unit. A unit, a housing to which the base, the field current control circuit unit, and the power control circuit unit are fixed, and a heat dissipation member thermally connected to the field current control circuit unit are provided. A power supply unit, which is spaced apart from the other side of the housing in the axial direction, is provided.
A cooling fluid passage is formed between the housing and the power supply unit through which the cooling fluid generated by the rotation of the cooling fan passes in the radial direction.
The heat radiating member is thermally connected to one side portion in the axial direction of the field current control circuit portion, protrudes to one side in the axial direction from the thermally connected portion, and is arranged in the cooling fluid passage. Has a part that has been
The base is a rotary electric machine integrated with a control device, which is arranged at positions in the circumferential direction and the radial direction different from the heat radiation member and is exposed to the cooling fluid passage. The heat radiating member is provided at one place in the circumferential direction.
The base is formed in a disk shape with at least a portion in which the heat radiation member is arranged cut out.
The controller-integrated rotary electric machine according to claim 5 , wherein one surface of the base in the axial direction is exposed to the cooling fluid passage. The controller-integrated rotary electric machine according to claim 6 , wherein the base is formed in a disk shape in which a peripheral portion and an axial center portion in which the heat radiating member is arranged are cut out. The controller-integrated rotary electric machine according to claim 6 , wherein the base is formed in a disk shape in which a portion in which the heat radiation member is arranged and an axial center portion are cut out. The intermediate portion of the base between the notch portion in which the heat dissipation member is arranged and the notch portion in the axial center portion is arranged on one side in the axial direction with a distance from the housing. The controller-integrated rotary electric machine according to claim 8 , wherein the cooling fluid flows at intervals. The radial outer surface of the intermediate portion of the base tilts inward in the radial direction as it moves to the other side in the axial direction.
A claim in which the radial inner surface of the radial outer portion of the notch in which the heat dissipation member is arranged is inclined inward in the radial direction as it moves to the other side in the axial direction. Item 9. The controller-integrated rotary electric machine according to Item 9. The control device integrated type according to any one of claims 1 to 10 , wherein the power control circuit unit and the field current control circuit unit are formed on the same substrate, and the substrate is fixed to the housing. Rotating electric machine. It is provided with a brush that is electrically connected to the field current control circuit unit and supplies current to the field winding.
The controller-integrated rotary electric machine according to any one of claims 1 to 11 , wherein the brush has a portion arranged in the cooling fluid passage. The controller-integrated rotary electric machine according to claim 12 , wherein the brush is arranged at a position in the same circumferential direction as the heat radiating member. The brush has an inner portion arranged radially inside the heat radiating member and a radial extending portion extending radially outward from the inner portion toward one side in the axial direction of the heat radiating member. Have and
The controller-integrated rotary electric machine according to claim 13 , wherein a portion of the heat radiating member on one side in the axial direction and a portion of the radial extension portion on the other side in the axial direction are thermally connected. A stator core having a field core wound with a field winding and rotating integrally with a rotating shaft, and a stator core arranged radially outside the rotor and having a stator winding wound around it. A stator having a stator, a housing that covers the outside of the field core and the stator core, and holds one end side and the other end side of the rotating shaft via a bearing, and the other side of the field core in the axial direction. A rotating electric machine main body provided with a cooling fan fixed to the end face,
It has a base formed in a plate shape and one surface in the axial direction is spaced apart from the other side in the axial direction of the housing, and a switching element for turning on / off the supply current to the stator winding. , A power circuit unit whose one surface in the axial direction is fixed to the base, a field current control circuit unit that controls the supply current to the field winding, and a power control circuit that controls the power circuit unit. A unit, a housing to which the base, the field current control circuit unit, and the power control circuit unit are fixed, and a heat dissipation member thermally connected to the field current control circuit unit are provided. A power supply unit, which is spaced apart from the other side of the housing in the axial direction, is provided.
A cooling fluid passage is formed between the housing and the power supply unit through which the cooling fluid generated by the rotation of the cooling fan passes in the radial direction.
The heat radiating member is thermally connected to one side portion in the axial direction of the field current control circuit portion, protrudes to one side in the axial direction from the thermally connected portion, and is arranged in the cooling fluid passage. Has a part that has been
The housing has a plate-shaped bottom extending in the radial and circumferential directions, and a field support that projects from the bottom to the other side in the axial direction and supports the field current control circuit unit from one side in the axial direction. With a part,
A controller-integrated rotary electric machine in which a through hole through which the heat radiating member penetrates is formed in a portion of the bottom portion facing one side in the axial direction of the field current control circuit portion.

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