JPWO2017022007A1 - Rotating electrical machine unit - Google Patents

Abstract

The rotating electrical machine unit includes a stator, a rotating electrical machine having a rotor that is rotatably provided to the stator, a control unit that controls the operation of the rotating electrical machine, and a blade portion in which a plurality of blades are arranged in the circumferential direction. A centrifugal fan that rotates with the rotor to flow air from the inside to the outside of the blade portion. The control unit, the rotating electrical machine, and the centrifugal fan are arranged in order in the axial direction. The rotating electrical machine has an air flow path portion that allows air to flow from one side of the rotating electrical machine to the other side in the axial direction on the inner peripheral portion thereof. The control unit overlaps with the ventilation channel in a plan view.

Description

The present invention relates to a rotating electrical machine unit.

A rotation shaft (for example, a crankshaft) of an engine provided in a vehicle or the like is connected to a starter motor that rotationally drives the rotation shaft of the engine with electric power or a rotating electrical machine that constitutes a generator that generates electric power by rotation of the rotation shaft of the engine. ing. The operation of this type of rotating electrical machine is controlled by a control unit. For example, when the engine is started by the rotating electrical machine, electric power is supplied from the control unit to the rotating electrical machine. Further, when power is generated in the rotating electrical machine, electric power is supplied from the rotating electrical machine to the control unit.

Generally, the control unit has electronic components that are vulnerable to heat. For this reason, conventionally, the rotating electrical machine is disposed near the engine, but the control unit is disposed away from the engine.
Patent Document 1 discloses a configuration in which a control unit is arranged in an engine room so that the influence of heat generated in the engine and hot air due to self-heating of the control unit can be suppressed.

JP 2010-195146 A

By the way, when the control unit is arranged at a position away from the rotating electrical machine as in the prior art, the wiring connecting the control unit and the rotating electrical machine becomes long and the voltage loss in the wiring becomes large. is there. For example, when the engine is started by the rotating electrical machine, it is necessary to supply electric power from the control unit to the rotating electrical machine at a higher voltage, which increases the power consumption required for starting the engine. Moreover, the electric power generated in the rotating electrical machine is wasted until the power reaches the control unit, and the actual power generation amount is reduced.
On the other hand, in order to shorten the wiring, it is necessary to dispose the control unit near the engine as in the case of the rotating electrical machine. In this case, it is necessary to actively cool the control unit.

An object of one aspect of the present invention is to provide a rotating electrical machine unit that can suppress voltage loss between the rotating electrical machine and a control unit and can efficiently cool the control unit.

A rotating electrical machine unit according to an aspect of the present invention includes a stator and a rotor that is rotatably provided with respect to the stator and rotates together with a rotating shaft of an engine, and constitutes at least one of a starter motor and a generator. A rotating electric machine, a control unit configured to control the operation of the rotating electric machine, and a blade portion in which a plurality of blades are arranged in a circumferential direction, and rotating the rotating shaft together with the air, A centrifugal fan configured to flow from the inside to the outside, wherein the control unit, the rotating electrical machine, and the centrifugal fan are sequentially arranged in the axial direction of the rotating shaft, and the rotating electrical machine has an inner circumference thereof A ventilation passage section for flowing air from one side of the rotating electrical machine to the other side in the axial direction in accordance with the rotation of the centrifugal fan. Knit is arranged so as to overlap with the ventilation passage portion in a plan view.

According to one aspect of the present invention, the centrifugal fan rotates, so that air flows in the vicinity of the control unit and the ventilation passage portion in the inner peripheral portion of the rotating electrical machine in order, Flows from inside to outside. Since air flows in the vicinity of the control unit, the control unit can be actively cooled. Further, since the control unit is actively cooled, the influence of the engine heat received by the control unit can be suppressed, so that the control unit can be disposed near the engine together with the rotating electrical machine. Therefore, the wiring connecting the rotating electrical machine and the control unit can be shortened, and voltage loss between the rotating electrical machine and the control unit can be suppressed. Thereby, the electric power generation amount in a rotary electric machine can be increased, or an engine can be started efficiently with small power consumption.
Further, since the rotational driving force of the centrifugal fan can be obtained from the engine or the rotating electrical machine, it is not necessary to separately prepare a driving source for driving the centrifugal fan, and the control unit can be efficiently cooled.

It is sectional drawing which shows the state which attached the rotary electric machine unit which concerns on 1st embodiment of this invention to the engine. It is sectional drawing which decomposed | disassembled the rotary electric machine unit of FIG. It is the top view which looked at the stator and connecting shaft part of Drawings 1 and 2 from the other side of a rotation electrical machinery. It is the top view which looked at the rotor of FIG.1, 2 and the connection shaft part from the one side of the rotary electric machine. It is the top view which looked at the centrifugal fan of FIGS. 1 and 2 from the other side of the rotating electrical machine. It is sectional drawing which shows the state which attached the rotary electric machine unit which concerns on 2nd embodiment of this invention to the engine. It is sectional drawing which decomposed | disassembled the rotary electric machine unit of FIG. It is the top view which looked at the rotor of FIG. 6, the connection shaft part, and the reinforcement frame from the one side of the rotary electric machine. It is sectional drawing which shows the state which attached the rotary electric machine unit which concerns on 3rd embodiment of this invention to the engine.

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the rotating electrical machine unit 1 according to this embodiment includes a rotating electrical machine 2, a control unit 3, and a centrifugal fan 4.

The rotating electrical machine 2 of the present embodiment is configured as a starter motor that rotationally drives a rotating shaft 102 (for example, a crankshaft) of the engine 100 with electric power. The rotating electrical machine 2 is configured as a generator that generates power by the rotation of the rotating shaft 102 of the engine 100. The rotation shaft 102 of the engine 100 is rotatably attached to the main body 101 of the engine 100. An end of the rotating shaft 102 in the axial direction (vertical direction in FIG. 1) protrudes from the main body 101.

The rotating electrical machine 2 includes a stator 11 and a rotor 12 provided to be rotatable with respect to the stator 11. The rotor 12 rotates with the rotating shaft 102 of the engine 100 with respect to the stator 11. The rotor 12 may be connected to the rotating shaft 102 via, for example, an endless belt or a gear (both not shown), but in this embodiment, the axis of the rotor 12 (the rotating electrical machine 2) is the axis L1 of the rotating shaft 102. Is attached to the rotating shaft 102 so as to coincide with.

As shown in FIGS. 1 to 3, the stator 11 includes a stator base portion 13 and a plurality of coils 14 attached to the stator base portion 13. The stator base portion 13 includes a plurality of teeth portions (not shown) arranged in the circumferential direction of the rotating shaft 102 (hereinafter also simply referred to as the circumferential direction). The plurality of coils 14 are wound around each tooth portion. That is, the plurality of coils 14 are arranged in the circumferential direction of the rotating shaft 102.

As shown in FIGS. 1, 2, and 4, the rotor 12 includes a rotor base portion 15 and a plurality of permanent magnets 16 fixed to the rotor base portion. The plurality of permanent magnets 16 are arranged in the circumferential direction so as to face the plurality of coils 14 described above.

The rotating electrical machine 2 may be, for example, a radial gap rotating electrical machine in which the stator 11 and the rotor 12 are arranged to face each other in the radial direction of the rotating shaft 102 (hereinafter also simply referred to as the radial direction). The rotating electrical machine 2 of the embodiment is an axial gap type rotating electrical machine that is disposed so that the stator 11 and the rotor 12 face each other in the axial direction of the rotating shaft 102 (hereinafter also simply referred to as the axial direction). Hereinafter, the rotating electrical machine 2 of the present embodiment will be described more specifically.

As shown in FIGS. 1 to 3, the stator base portion 13 includes a base plate portion 21 formed in a plate shape having a circular shape in plan view when viewed from the axial direction. The plurality of coils 14 are provided on one main surface 22 of the base plate portion 21 and are arranged in the circumferential direction of the base plate portion 21. Thereby, the plurality of coils 14 are formed in a cylindrical shape as a whole.

A plurality of through holes 23 and 24 penetrating in the thickness direction of the base plate portion 21 are formed in a portion of the base plate portion 21 in a plan view on the inner peripheral side of the plurality of coils 14. The first through hole 23 is formed in a circular shape in plan view with the axis of the base plate portion 21 as the center. A plurality of second through holes 24 are formed around the first through hole 23 in plan view. Although the planar view shape of the plurality of through holes 23 and 24 may be arbitrary, in the present embodiment, it is circular.

As shown in FIGS. 1, 2, and 4, the rotor base portion 15 is formed in a circular plate shape in plan view. The plurality of permanent magnets 16 are fixed to one main surface 25 of the rotor base portion 15 facing the one main surface 22 of the base plate portion 21 described above. The plurality of permanent magnets 16 are arranged in the circumferential direction of the rotor base portion 15. The magnetic poles of the plurality of permanent magnets 16 facing the base plate portion 21 side of the stator 11 alternately appear in the circumferential direction of the rotor base portion 15.
In addition, the stator 11 and the rotor 12 are arranged at intervals so that the plurality of coils 14 and the plurality of permanent magnets 16 face each other in the axial direction of the rotating shaft 102.

A plurality of through holes 26 and 27 penetrating in the thickness direction of the rotor base portion 15 are formed in a portion of the rotor base portion 15 in a plan view on the inner peripheral side of the plurality of permanent magnets 16. The third through hole 26 is formed in a circular shape in plan view with the axis of the rotor base portion 15 as the center.
A plurality of fourth through holes 27 are formed around the third through hole 26 in plan view. The shape of the fourth through hole 27 in plan view may be arbitrary, but in the present embodiment, it is an arc shape.

As shown in FIGS. 1-4, the rotary electric machine 2 of this embodiment is further provided with the connection shaft part 17 which connects the stator 11 and the rotor 12 rotatably. The connecting shaft portion 17 fixes the relative position between the stator 11 and the rotor 12 in the axial direction of the rotating shaft 102. The connecting shaft portion 17 includes a shaft portion main body 31 and a bearing portion 32.

The shaft body 31 is formed to extend in the axial direction of the rotating shaft 102 and is inserted into the first through hole 23 of the stator base portion 13 and the third through hole 26 of the rotor base portion 15. The shaft body 31 may be fixed to the stator base 13, for example, but is fixed to the rotor base 15 in this embodiment.

A flange portion 33 for fixing the shaft portion main body 31 to the rotor base portion 15 is formed at a first end portion in the axial direction of the shaft portion main body 31. The portion between the third through hole 26 and the plurality of fourth through holes 27 in the rotor base portion 15 through which the shaft main body 31 is inserted comes into contact with the flange portion 33. A method for fixing the rotor base portion 15 and the flange portion 33 may be arbitrary, such as screwing. In a state where the rotor base portion 15 and the flange portion 33 are fixed, the axes of the rotor 12 and the connecting shaft portion 17 coincide.

The bearing portion 32 enables the stator 11 and the rotor 12 connected by the connecting shaft portion 17 to rotate relative to each other. The bearing portion 32 is a radial bearing such as a ball bearing or a roller bearing. The bearing portion 32 may be provided, for example, between the outer periphery of the shaft portion main body 31 and the third through hole 26 of the rotor base portion 15, but in the present embodiment, the outer periphery of the shaft portion main body 31 and the stator base portion 13. The first through hole 23 is provided.

The bearing portion 32 is fixed in the first through hole 23 of the stator base portion 13. Further, the bearing portion 32 is positioned at the second end portion in the axial direction of the shaft body 31. More specifically, a locking surface 34 facing the axial direction of the shaft body 31 is formed at the second end of the shaft body 31. The bearing portion 32 and the stator base portion 13 fixed to the bearing portion 32 are positioned at the second end portion of the shaft portion main body 31 by the inner peripheral portion of the bearing portion 32 coming into contact with the locking surface 34 of the shaft portion main body 31. .
That is, the connecting shaft portion 17 has an axial distance between the stator base portion 13 and the rotor base portion 15, more specifically, the coil 14 of the stator 11 and the rotor 12 by the flange portion 33 and the locking surface 34. A gap (gap) with the permanent magnet 16 is set.

For example, the rotor 12 may be directly fixed to the rotating shaft 102 of the engine 100, but in the present embodiment, the rotor 12 is fixed to the rotating shaft 102 via the connecting shaft portion 17. The connecting shaft portion 17 of the present embodiment is provided with a fixing portion 35 for fixing it to the rotating shaft 102 of the engine 100.

For example, the fixed portion 35 may be provided at the second end portion (stator 11 side) of the shaft portion main body 31, but in the present embodiment, the fixed portion 35 is provided at the first end portion (rotor 12 side) of the shaft portion main body 31. . For this reason, in a state where the rotor 12 is fixed to the rotating shaft 102, the rotor 12 and the stator 11 are arranged in this order from the engine 100 side. In the present embodiment, the fixed portion 35 protrudes from the rotor base portion 15 to the outside of the rotating electrical machine 2 in the axial direction of the shaft portion main body 31.

The fixed portion 35 includes a bottomed insertion hole 37 that is recessed from the first end surface 36 facing the axial direction of the shaft body 31 at the first end of the shaft body 31, and the rotation shaft 102 that is inserted into the insertion hole 37. A screw 38 for fixing the end to the shaft body 31.
The insertion hole 37 is formed so that the end of the rotating shaft 102 fits. The screw 38 may be attached to the shaft main body 31 so as to protrude into the insertion hole 37 from at least the inner surface of the insertion hole 37 and screwed to the end of the rotating shaft 102 inserted into the insertion hole 37. In the present embodiment, the screw 38 is attached to the shaft portion main body 31 so as to protrude in the axial direction of the shaft portion main body 31 from the bottom surface of the insertion hole 37. As a result, the end of the rotating shaft 102 can be fixed to the shaft body 31.
In a state where the connecting shaft portion 17 and the rotating shaft 102 are fixed to each other, the axis of the connecting shaft portion 17 coincides with the axis L1 of the rotating shaft 102. As a result, the axis of the rotating electrical machine 2 coincides with the axis L1 of the rotating shaft 102.

The rotating electrical machine 2 described above has an air flow passage section 40 that flows air from one side of the rotating electrical machine 2 to the other side in the axial direction of the rotating shaft 102 in accordance with the rotation of the centrifugal fan 4 to be described later on the inner periphery thereof. Have. The one side and the other side of the rotating electrical machine 2 mean a space on one side and a space on the other side of the rotating electrical machine 2, respectively.
In the present embodiment, the ventilation flow path portion 40 includes a plurality of second through holes 24 of the stator base portion 13 and a space on the inner peripheral side of the plurality of coils 14 arranged in the circumferential direction (hereinafter referred to as an inner peripheral space 29). And a plurality of fourth through holes 27 of the rotor base portion 15.

Inner circumferential spaces 29 of the plurality of coils 14 are located between the stator base portion 13 and the rotor base portion 15 in the axial direction of the rotating shaft 102. The inner circumferential space 29 communicates with one side of the rotating electrical machine 2 through the plurality of second through holes 24. Further, the inner circumferential space 29 communicates with the other side of the rotating electrical machine 2 through a plurality of fourth through holes 27.
In other words, the stator base portion 13 and the plurality of coils 14 are arranged such that the plurality of second through holes 24 and the inner circumferential space 29 overlap when viewed from the axial direction. Further, the stator 11 (particularly the plurality of coils 14) and the rotor 12 (particularly the rotor base portion 15) are arranged such that the inner circumferential space 29 and the plurality of fourth through holes 27 overlap each other when viewed from the axial direction.
Thus, air can flow from one side of the rotating electrical machine 2 to the other side of the rotating electrical machine 2 through the plurality of second through holes 24, the inner peripheral space 29, and the plurality of fourth through holes 27.

In the present embodiment, the ventilation channel portion 40 further includes an in-shaft channel 41 formed in the connecting shaft portion 17. The in-shaft channel 41 allows air to flow into the inside of the connecting shaft portion 17 from the end surface (second end surface 39 described later) of the connecting shaft portion 17 located at one end of the rotating electrical machine 2 in the axial direction of the rotating shaft 102. In the axial direction, it is allowed to flow outward from the outer peripheral surface of the connecting shaft portion 17 at a position shifted from the one end of the rotating electrical machine 2 toward the other end of the rotating electrical machine 2. Hereinafter, the in-shaft channel 41 of the present embodiment will be specifically described.

The in-shaft channel 41 includes an axial hole 42 that extends in the axial direction of the shaft body 31 and a radial hole 43 that extends in the radial direction of the shaft body 31.
The axial hole 42 is a bottomed hole that opens in the second end surface 39 of the shaft main body 31 facing the axial direction of the shaft main body 31 at the second end of the shaft main body 31 corresponding to one end of the rotating electrical machine 2. It is.

The radial hole 43 penetrates from the inner peripheral surface of the shaft main body 31 constituting the axial hole 42 to the outer peripheral surface of the shaft main body 31 at the bottom of the axial hole 42. The radial hole portion 43 opens to the outer peripheral side of the shaft portion main body 31 between the rotor base portion 15 and the base plate portion 21 of the stator base portion 13. In the present embodiment, the radial hole 43 communicates the axial hole 42 and the inner circumferential space 29 of the plurality of coils 14. For example, a plurality of radial holes 43 may be arranged in the circumferential direction of the shaft body 31, but only one is formed in this embodiment.

As shown in FIGS. 1 and 2, the control unit 3 is configured to be electrically connected to the rotating electrical machine 2 by wiring (not shown) and to control the operation of the rotating electrical machine 2. The control unit 3 controls the power supplied to the rotating electrical machine 2 when the rotating electrical machine 2 functions as a starter motor, for example. For example, when the rotating electrical machine 2 functions as a generator, the control unit 3 appropriately adjusts the voltage and current of the power generated by the rotating electrical machine 2 and then charges the generated power to a battery (not shown). Or directly supplied to various electrical components (not shown).

The external shape of the control unit 3 may be arbitrary, but in the present embodiment, it is formed in a thick disk shape.
The control unit 3 includes a control circuit unit 51 for controlling the operation of the rotating electrical machine 2 and a case 52 that houses the control circuit unit 51. The control unit 3 further includes a sealing resin 53 that seals the control circuit unit 51 in the case 52. The control unit 3 further includes terminals (not shown) such as connectors for electrically connecting the control circuit unit 51 to the rotating electrical machine 2, the battery, and various electrical components.

The control circuit unit 51 of this embodiment includes a substrate 54 and an electronic component 55 mounted on the substrate 54. 1 and 2, only one electronic component 55 is mounted on the substrate 54, but a plurality of electronic components 55 of various sizes and types may be mounted, for example. The electronic component 55 shown in FIGS. 1 and 2 is a heat source of the control unit 3 that mainly generates heat when controlling the operation of the rotating electrical machine 2.

The case 52 makes the appearance of the control unit 3. The case 52 opens to one side of the control unit 3 in the thickness direction. The case 52 of the present embodiment includes a plate-like bottom wall portion 56 and a cylindrical peripheral wall portion 57 that extends in the thickness direction of the bottom wall portion 56 at the periphery of the bottom wall portion 56. An electronic component 55 as a heat source is disposed near the opening of the case 52.

As shown in FIGS. 1, 2, and 5, the centrifugal fan 4 is provided so as to rotate together with the rotating shaft 102 of the engine 100, similarly to the rotor 12 described above. The centrifugal fan 4 has a blade portion 62 in which a plurality of blades 61 are arranged in the circumferential direction. The centrifugal fan 4 is configured to flow air from the inside to the outside of the blade portion 62 in the radial direction by rotating about its axis. The centrifugal fan 4 of the present embodiment is a sirocco fan and has a cylindrical appearance.

As shown in FIGS. 1 and 2, the control unit 3, the rotating electrical machine 2, and the centrifugal fan 4 are sequentially arranged in the axial direction of the rotating shaft 102.
The control unit 3 is disposed on one side of the rotating electrical machine 2 in the axial direction of the rotating shaft 102. That is, the control unit 3 is disposed so as to face the stator base portion 13 of the rotating electrical machine 2 in the axial direction of the rotating shaft 102. The control unit 3 is disposed so as to overlap the ventilation flow path portion 40 of the rotating electrical machine 2 in a plan view as viewed from the axial direction of the rotating shaft 102. In the present embodiment, the control unit 3 is arranged with an interval in the axial direction of the rotating shaft 102 with respect to the rotating electrical machine 2.

In the present embodiment, the control unit 3 is arranged such that the opening of the case 52 faces the stator base portion 13. For this reason, the electronic component 55 as a heat source is disposed in a portion of the control unit 3 that faces the rotating electrical machine 2.

On the other hand, the centrifugal fan 4 is disposed on the other side of the rotating electrical machine 2 in the axial direction of the rotating shaft 102. That is, the centrifugal fan 4 is arranged so as to face the rotor base portion 15 of the rotating electrical machine 2 in the axial direction of the rotating shaft 102. The centrifugal fan 4 is located inward of the blade portion 62 in the radial direction of the blade portion 62 in which the ventilation passage portion 40 of the rotating electrical machine 2 is cylindrical in a plan view as viewed from the axial direction of the rotating shaft 102. Arranged.

The centrifugal fan 4 may be connected to the rotating shaft 102 via, for example, an endless belt or a gear (both not shown), or directly fixed to the rotating shaft 102. In this embodiment, the centrifugal fan 4 is connected via the rotor 12. And fixed to the rotating shaft 102 of the engine 100. That is, the centrifugal fan 4 is fixed to the rotor 12.

The fixing of the centrifugal fan 4 to the rotor 12 will be described more specifically.
As shown in FIGS. 1, 2, and 5, the centrifugal fan 4 according to the present embodiment is disposed at the first end portion in the axial direction of the cylindrical blade portion 62, and is located on the inner side of the blade portion 62 in the radial direction. An extending annular plate portion 63 is provided. The annular plate portion 63 is arranged so as to overlap the rotor base portion 15 in the plate thickness direction so as not to block the plurality of fourth through holes 27. In addition, the annular plate portion 63 is fixed to the rotor base portion 15 by screwing or the like. Thereby, the centrifugal fan 4 is fixed to the rotor 12.
In a state where the centrifugal fan 4 is fixed to the rotor 12, the axes of the centrifugal fan 4 and the rotor 12 coincide with each other. In this state, the fixed portion 35 of the connecting shaft portion 17 is disposed inside the centrifugal fan 4. For this reason, in this embodiment, the engine 100 is arranged on the second end side of the blade portion 62 with respect to the centrifugal fan 4.

As shown in FIGS. 1 and 2, the rotating electrical machine unit 1 of the present embodiment further includes a mounting portion 70 for attaching the stator 11 of the rotating electrical machine 2 to the main body 101 of the engine 100. For example, the attachment portion 70 may attach the stator 11 to the main body portion 101 so as not to move, but in the present embodiment, the stator 11 is attached to the main body portion 101 so as to be movable only in the axial direction of the rotary shaft 102. In addition, the rotating electrical machine unit 1 further includes a pair of urging portions 71 and 71 that are arranged on both sides of the stator 11 in the axial direction of the rotating shaft 102 and urge the stator in the axial direction with respect to the mounting portion 70. .

More specifically, the mounting portion 70 of the present embodiment is formed in a ring shape in plan view and supports a stator 11, and extends from the support portion 72 in the axial direction of the rotary shaft 102 to the main body of the engine 100. And an extension part 73 that reaches the part 101.
The support portion 72 is arranged with a gap on both sides in the axial direction with respect to the stator 11, and a pair of limiting wall portions 74 and 74 that limit the movement range of the stator 11 in the axial direction to a predetermined range, and a radial direction And a connecting wall portion 75 that is disposed outside the stator 11 and connects the pair of limiting wall portions 74 and 74.

Between the pair of limiting wall portions 74 and 74, an outer peripheral edge portion that is positioned outside the plurality of coils 14 in the radial direction in the base plate portion 21 of the stator 11 is disposed. A plurality of the pair of limiting wall portions 74 and 74 may be provided, for example, at intervals in the circumferential direction of the stator 11, but are formed in a ring shape in plan view in the present embodiment. For this reason, the entire circumferential direction of the outer peripheral edge portion of the base plate portion 21 is disposed between the pair of limiting wall portions 74 and 74.
In order to allow the stator 11 to move only in the axial direction between the pair of limiting wall portions 74, 74, for example, a pin (not shown) extending in the axial direction is provided between the pair of limiting wall portions 74, 74. The pins may be inserted through the outer peripheral edge of the base plate portion 21.

The extension part 73 is formed integrally with the support part 72 described above. The extending portion 73 is disposed outside the rotating electrical machine 2 and the centrifugal fan 4 in the radial direction.
The extending portion 73 may be configured by a plurality of rod-like members arranged at intervals in the circumferential direction, for example, but in the present embodiment, a cylindrical shape that surrounds the rotating electrical machine 2 and the centrifugal fan 4 in the radial direction. Is formed. That is, the mounting portion 70 of the present embodiment functions as a cylindrical case 52 that houses the rotating electrical machine 2 and the centrifugal fan 4.

The extending portion 73 of the present embodiment is formed with a ventilation through hole 76 for flowing the air that flows out of the blade portion 62 in accordance with the rotation of the centrifugal fan 4 in a predetermined direction.
The ventilation through-hole 76 is formed through the extending portion 73 in the radial direction at a portion of the extending portion 73 that faces the outside of the blade portion 62. The ventilation through hole 76 is formed in a part of the extending portion 73 in the circumferential direction. In the illustrated example, only one ventilation through hole 76 is formed. However, a plurality of through holes 76 may be formed, for example.

The distal end portion of the extending portion 73 in the extending direction is fixed to the surface of the main body 101 of the engine 100 from which the rotating shaft 102 protrudes (attachment surface 104) by screwing or the like. As a result, the stator 11 is attached to the main body 101 of the engine 100 via the attachment portion 70. In a state where the stator 11 is attached to the main body 101, the stator 11 can be prevented from rotating together with the rotor 12.

The pair of urging portions 71 and 71 are respectively disposed between the outer peripheral edge portion of the base plate portion 21 and the limiting wall portion 74. For example, a plurality of pairs of urging portions 71 and 71 are arranged at intervals in the circumferential direction of the base plate portion 21. The stator 11 is arranged in a stable state between the pair of limiting wall portions 74 and 74 by the biasing force of the pair of biasing portions 71 and 71. The urging portion 71 may be a coil spring as shown in the figure, or may be a leaf spring or rubber, for example.

The control unit 3 may be fixed to the stator 11 of the rotating electrical machine 2, for example, but is fixed to the mounting portion 70 in the present embodiment. In the present embodiment, the control unit 3 is fixed to a support portion 72 formed in a ring shape in plan view via a spacer 77. In the present embodiment, a plurality of spacers 77 are arranged at intervals in the circumferential direction of the support portion 72. Thereby, the ventilation flow path part 40 of the rotary electric machine 2 communicates with the external space through the gaps between the rotary electric machine 2 and the support part 72 and the control unit 3. In this configuration, when the centrifugal fan 4 rotates, the air in the external space flows from the gap between the rotating electrical machine 2 and the control unit 3 toward the ventilation channel portion 40.

Furthermore, in this embodiment, a part or the whole of the configuration in which the rotating electrical machine unit 1 is attached to the engine 100 is covered with the engine cover 103. The engine cover 103 has a predetermined part of the engine 100 (for example, a combustion chamber of the engine 100) as shown by an arrow F8 in FIG. It is formed to flow toward the vicinity.
The rotating electrical machine unit 1 of the present embodiment is attached to the engine 100 so that the ventilation through hole 76 of the attachment portion 70 described above faces the engine cover 103.

In the rotating electrical machine unit 1 of the present embodiment, when the centrifugal fan 4 rotates by obtaining driving force from the engine 100 or the rotating electrical machine 2, air is present in the vicinity of the control unit 3 and in the inner periphery of the rotating electrical machine 2. After flowing through the ventilation channel 40 in order, the air flows from the inside to the outside of the blade 62.

More specifically, when the centrifugal fan 4 rotates, air flows in the radial direction and enters the gap between the rotating electrical machine 2 and the control unit 3 from the external space as indicated by an arrow F1 in FIG. . Thereby, air flows along the site | part (opposite site | part) which opposes the rotary electric machine 2 among the control units 3. FIG. That is, air flows in the vicinity of the facing portion of the control unit 3.

The air that has entered the gap between the rotating electrical machine 2 and the control unit 3 flows into the ventilation passage section 40 of the rotating electrical machine 2 from one side of the rotating electrical machine 2 as shown by arrows F2 and F3 in FIG. Flowing.
In the present embodiment, a part of the air that has entered the gap between the rotating electrical machine 2 and the control unit 3 passes from the plurality of second through holes 24 of the stator base portion 13 to a plurality of coils as indicated by an arrow F2 in FIG. 14 enters the inner circumferential space 29 and flows in the axial direction toward the rotor base portion 15.

The remaining part of the air that has entered the gap between the rotating electrical machine 2 and the control unit 3 enters the in-shaft channel 41 of the connecting shaft 17 as shown by an arrow F3 in FIG. Flows in the axial direction toward the 15 side. Air flowing through the shaft inner flow channel 41 flows from the inner side to the outer shaft flow channel 41 through the radial hole 43 of the shaft inner flow channel 41 as indicated by an arrow F4 in FIG. 14 in the inner circumferential space 29. The air flow indicated by the arrow F4 merges with the air flow indicated by the arrow F2 in the inner circumferential space 29 of the coil 14.

The air flow merged in the inner circumferential space 29 flows in the axial direction as shown by an arrow F5 in FIG. 1 and flows out to the other side of the rotating electrical machine 2 through the fourth through hole 27 of the rotor base portion 15. It enters the inside of the centrifugal fan 4 (blade part 62).
The air that has entered the inside of the centrifugal fan 4 (blade part 62) flows from the inside to the outside of the blade part 62 as indicated by an arrow F6 in FIG.

The air that has flowed outside the blade portion 62 passes through the ventilation through hole 76 formed in the cylindrical extension portion 73 surrounding the outside of the blade portion 62, as shown by an arrow F7 in FIG. Flows out of the outside.
The air that has flowed to the outside of the extending portion 73 flows toward a predetermined portion of the engine 100 by the engine cover 103 as indicated by an arrow F8 in FIG.

As described above, according to the rotating electrical machine unit 1 of the present embodiment, since the air flows in the vicinity of the control unit 3 as the centrifugal fan 4 rotates, the control unit 3 is actively cooled. For this reason, it becomes possible to suppress the influence of the heat of the engine 100 which the control unit 3 receives, and the control unit 3 can be disposed near the engine 100 together with the rotating electrical machine 2. Accordingly, the wiring connecting the rotating electrical machine 2 and the control unit 3 can be shortened, and voltage loss between the rotating electrical machine 2 and the control unit 3 can be suppressed. Thereby, the electric power generation amount in the rotary electric machine 2 can be increased, or the engine 100 can be started efficiently with small power consumption.
Further, since the rotational driving force of the centrifugal fan 4 is obtained from the engine 100 or the rotating electrical machine 2, it is not necessary to separately prepare a drive source for driving the centrifugal fan 4, and the control unit 3 can be efficiently cooled.

Further, in the present embodiment, the centrifugal fan 4 is arranged between the control unit 3 and the engine 100, so that air that flows in the vicinity of the control unit 3 flows from the control unit 3 toward the engine 100 side. For this reason, the influence of the heat of the engine 100 which the control unit 3 receives can be suppressed effectively.

Further, according to the rotating electrical machine unit 1 of the present embodiment, since the rotating electrical machine 2 is an axial gap type rotating electrical machine, the dimension (thickness dimension) of the rotating electrical machine 2 in the axial direction is smaller than that of the radial gap type rotating electrical machine. Can be set small. Therefore, the rotating electrical machine unit 1 can be thinned.

Further, according to the rotating electrical machine unit 1 of the present embodiment, the stator 11 and the rotor 12 that form an axial gap type rotating electrical machine are connected by the connecting shaft portion 17. For this reason, before assembling the rotating electrical machine 2 to the engine 100, the gap (gap) between the stator 11 and the rotor 12 in the axial direction can be set in advance by the connecting shaft portion 17. Thereby, the gap between the stator 11 and the rotor 12 can be easily set narrow, and the performance of the rotating electrical machine 2 can be easily improved.

Further, according to the rotating electrical machine unit 1 of the present embodiment, the ventilation flow path portion 40 of the rotating electrical machine 2 includes the in-shaft channel 41 formed in the connecting shaft portion 17. For this reason, even if the rotary electric machine 2 is configured by connecting the stator 11 and the rotor 12 by the connecting shaft portion 17, the flow passage cross section of the ventilation flow passage portion 40 orthogonal to the axial direction can be set large. Therefore, more air can flow from the control unit 3 side to the centrifugal fan 4 side, and the control unit 3 can be efficiently cooled.

In the rotating electrical machine unit 1 of the present embodiment, the rotor 12 of the rotating electrical machine 2 is attached to the end of the rotating shaft 102 of the engine 100 via the connecting shaft portion 17. In addition, the stator 11 of the rotating electrical machine 2 is attached to the main body portion 101 of the engine 100 by the attachment portion 70 so as to be movable only in the axial direction. For this reason, even when the protruding length of the rotating shaft 102 protruding from the main body 101 of the engine 100 varies, the rotating electric machine 2 moves in the axial direction of the rotating shaft 102 with respect to the main body 101 when the rotating electric machine 2 is attached. By moving, the rotating electrical machine 2 can be stably attached to the engine 100.

Further, according to the rotating electrical machine unit 1 of the present embodiment, the pair of urging portions 71 and 71 are arranged on both sides of the stator 11 in the axial direction, and urge the stator 11 in the axial direction with respect to the mounting portion 70. For this reason, the axial position of the stator 11 (the rotating electrical machine 2) relative to the mounting portion 70 and the main body portion 101 of the engine 100 can be stabilized by the biasing force of the pair of biasing portions 71 and 71.

Further, according to the rotating electrical machine unit 1 of the present embodiment, the rotating electrical machine 2 and the control unit 3 are arranged with an interval in the axial direction. For this reason, the opposing part which opposes the rotary electric machine 2 among the control units 3 can be cooled especially efficiently. In the present embodiment, since the electronic component 55 as a heat generation source is disposed at a portion facing the control unit 3, the electronic component 55 can be efficiently cooled.

Moreover, according to the rotary electric machine unit 1 of this embodiment, the centrifugal fan 4 and the rotor 12 are coaxially arranged. For this reason, both the centrifugal fan 4 and the rotor 12 can be directly connected to the rotating shaft 102 of the engine 100 without an endless belt or gear. That is, the number of component parts of the rotating electrical machine unit 1 can be set small.

Furthermore, according to the rotating electrical machine unit 1 of the present embodiment, the ventilation through hole 76 is formed only in a part in the circumferential direction of the mounting portion 70 surrounding the outside of the blade portion 62 in the radial direction. For this reason, the air flowing out of the rotating centrifugal fan 4 can be made to flow in a desired direction as indicated by an arrow F7 in FIG. As a result, all the air that has flowed out of the attachment portion 70 from the ventilation through hole 76 can flow to a predetermined portion of the engine 100 as indicated by an arrow F8 in FIG. It can be cooled efficiently.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with a focus on differences from the first embodiment with reference to FIGS. In addition, about the structure which is common in 1st embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

6-8, the rotary electric machine unit 1A which concerns on this embodiment is provided with 2 A of rotary electric machines, the control unit 3, and the centrifugal fan 4 similarly to 1st embodiment. The configurations of the control unit 3 and the centrifugal fan 4 are the same as in the first embodiment.
The rotating electrical machine 2A of the present embodiment is an axial gap type rotating electrical machine similar to the first embodiment, and includes a stator 11 and a rotor 12A. As in the first embodiment, the rotor 12A of this embodiment includes a rotor base portion 15A formed in a plate shape having a circular shape in plan view, and a plurality of permanent magnets fixed to one main surface 25 of the rotor base portion 15A. 16.

However, only one fifth through hole 27A penetrating in the thickness direction of the rotor base portion 15A is formed in a portion of the rotor base portion 15A of the present embodiment on the inner peripheral side of the plurality of permanent magnets 16. Yes. The fifth through hole 27A of the rotor base portion 15A is formed in a circular shape in plan view with the axis of the rotor base portion 15A as the center. The size of the fifth through hole 27A in plan view is larger than the third and fourth through holes 26 and 27 (see FIG. 4) formed in the rotor base portion 15A of the first embodiment. For example, the fifth through hole 27A of the rotor base portion 15A is formed in a size including the entire formation region of the third and fourth through holes 26 and 27 in the rotor base portion 15A of the first embodiment.

The fifth through hole 27 </ b> A of the rotor base portion 15 </ b> A, together with the plurality of second through holes 24 of the stator base portion 13 and the inner peripheral space 29 of the plurality of coils 14, rotates the rotary electric machine 2 </ b> A along with the rotation of the centrifugal fan 4. A ventilation flow path portion 40A for flowing air from one side to the other side is configured. However, in this embodiment, since the shaft part main body 31A of the connecting shaft part 17A, which will be described later, is inserted into the fifth through hole 27A of the rotor base part 15A, the shaft part main body of the fifth through hole 27A of the rotor base part 15A. A portion excluding the insertion portion of 31A functions as the ventilation passage portion 40A.

In the rotating electrical machine unit 1A of the present embodiment, the centrifugal fan 4 and the rotor 12A are integrally fixed via a reinforcing frame 80A. The reinforcing frame 80A may be formed, for example, in the same shape as the rotor base portion 15A of the first embodiment, but is formed in a different shape in the present embodiment.
The reinforcing frame 80A of the present embodiment includes an annular portion 81A formed in a plate shape with an annular shape in plan view, a cylindrical portion 82A extending from the inner edge of the annular portion 81A to one side in the thickness direction of the annular portion 81A, and a cylinder A plate-like lid portion 83A that closes one end of the portion 82A in the axial direction.

The cylindrical portion 82A is formed with a flow hole 84A penetrating in the thickness direction. Thereby, air can be flowed from the inner side to the outer side of the cylindrical portion 82A in the radial direction. For example, only one circulation hole 84A may be formed in a part in the circumferential direction of the cylindrical portion 82A, but in the present embodiment, a plurality of circulation holes 84A are formed at intervals in the circumferential direction of the cylindrical portion 82A. In the illustrated example, the cylindrical portion 82A is inclined so as to move away from the annular portion 81A in the radial direction in the radial direction as it goes in the thickness direction of the annular portion 81A. For example, the cylindrical portion 82A is parallel to the thickness direction of the annular portion 81A. And may extend.
The lid portion 83A is formed with an insertion hole 85A penetrating in the plate thickness direction. The shaft portion main body 31A of the connecting shaft portion 17A described later is inserted through the insertion hole 85A.

The annular portion 81A is disposed between the annular plate portion 63 of the centrifugal fan 4 and the rotor base portion 15A in the axial direction. The rotor 12A, the reinforcing frame 80A, and the centrifugal fan 4 are integrated with each other by fixing the rotor base portion 15A, the annular portion 81A, and the annular plate portion 63 in order in the plate thickness direction and then fixing them together by screws or the like. Fixed to. In a state where the rotor 12A, the reinforcing frame 80A, and the centrifugal fan 4 are fixed, the axes of the rotor 12A, the reinforcing frame 80A, and the centrifugal fan 4 coincide.

The cylindrical portion 82 </ b> A and the lid portion 83 </ b> A are inserted into the blade portion 62 from the first end portion of the blade portion 62 of the centrifugal fan 4. The length of the cylindrical portion 82A in the axial direction may be longer than the axial length of the centrifugal fan 4, for example, but is shorter than the axial length of the centrifugal fan 4 in this embodiment. For this reason, the cylindrical portion 82 </ b> A and the lid portion 83 </ b> A are arranged inside the blade portion 62.

The rotating electrical machine 2A of the present embodiment includes a connecting shaft portion 17A similar to that of the first embodiment. The connecting shaft portion 17A of the present embodiment includes a shaft portion main body 31A and a bearing portion 32 similar to those of the first embodiment.
However, in the present embodiment, the flange portion 33A formed at the first axial end portion of the shaft portion main body 31A is for fixing the shaft portion main body 31A to the reinforcing frame 80A. The flange portion 33A contacts the lid portion 83A of the reinforcing frame 80A inserted through the shaft portion main body 31A. The method of fixing the reinforcing frame 80A and the flange portion 33A may be arbitrary, such as screwing. In a state where the reinforcing frame 80A and the flange portion 33A are fixed, the axes of the reinforcing frame 80A and the connecting shaft portion 17A coincide. That is, the axes of the rotor 12A, the centrifugal fan 4, and the connecting shaft portion 17A coincide.

In the present embodiment, the in-shaft channel 41 of the connecting shaft portion 17A constituting the ventilation channel portion 40A includes the axial hole portion 42 and the radial hole portion 43 similar to those in the first embodiment. However, in the present embodiment, the radial hole 43 communicates the axial hole 42 and the inner space 86A of the cylindrical portion 82A of the reinforcing frame 80A. That is, the radial hole portion 43 is located inside the blade portion 62 of the centrifugal fan 4. Further, the radial hole portion 43 is arranged to face at least one of the plurality of flow holes 84A of the cylindrical portion 82A in the radial direction.

Also in the rotating electrical machine unit 1A of the present embodiment, when the centrifugal fan 4 rotates by obtaining a driving force from the engine 100 or the rotating electrical machine 2A, air is supplied to the vicinity of the control unit 3 and to the inner peripheral portion of the rotating electrical machine 2A. After flowing in order through a certain air flow path portion 40A, the air flows from the inside to the outside of the blade portion 62.

Specifically, in the rotating electrical machine unit 1A of the present embodiment, when the centrifugal fan 4 rotates, the air flow indicated by arrows F1, F2, F3, F6, F7, and F8 in FIG. It is the same as the form.
However, in the present embodiment, the air flowing through the shaft inner passage 41 passes from the inside of the shaft inner passage 41 by passing through the radial hole 43 of the shaft inner passage 41 as indicated by an arrow F4A in FIG. It flows to the outside and enters the inner space 86A of the cylindrical portion 82A disposed inside the centrifugal fan 4.

Further, the air that has entered the inner circumferential space 29 of the coil 14 from the plurality of second through holes 24 of the stator base portion 13 passes through the fifth through holes 27A of the rotor base portion 15A as indicated by an arrow F5A in FIG. By passing through and entering the inner space 86A of the cylindrical portion 82A and reaching the lid portion 83A, it flows in the radial direction toward the cylindrical portion 82A.
The air flow indicated by the arrow F5A merges with the air flow indicated by the arrow F4A flowing from the in-shaft flow path 41 to the inner space 86A of the cylindrical portion 82A and passes through the flow hole 84A of the cylindrical portion 82A. Flows outward. The air that flows out of the cylindrical portion 82A flows from the inside to the outside of the blade portion 62 as shown by an arrow F6 in FIG. 6 without greatly changing the flow direction.

According to the rotating electrical machine unit 1A of the present embodiment, the same effects as those of the first embodiment can be obtained.
Further, according to the rotating electrical machine unit 1A of the present embodiment, the centrifugal fan 4 and the rotor 12A are integrally fixed via the reinforcing frame 80A. For this reason, the reinforcing frame 80 </ b> A can be interposed between the centrifugal fan 4 and the rotor 12 </ b> A and the rotating shaft 102. Thereby, the stress applied to the centrifugal fan 4 and the rotor 12A as the rotating shaft 102 rotates can be reduced. In addition, the rigidity of the centrifugal fan 4 can be improved.

In addition, according to the rotating electrical machine unit 1A of the present embodiment, compared to the rotating electrical machine unit 1 of the first embodiment, the number of times the air flow direction changes greatly is reduced, and the air resistance can be reduced. That is, air can be efficiently flowed from one side of the rotating electrical machine 2A to the other side.

In the rotating electrical machine unit 1A of the second embodiment, the fixed portion 35 of the connecting shaft portion 17A protrudes in the axial direction from the centrifugal fan 4 and is disposed outside the centrifugal fan 4. For example, as in the first embodiment, Similarly, it may be arranged inside the centrifugal fan 4 (blade part 62).

[Third embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG. 9, focusing on differences from the first and second embodiments. In addition, about the structure which is common in 1st, 2nd embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

As shown in FIG. 9, the rotating electrical machine unit 1B according to the present embodiment includes the rotating electrical machine 2A, the control unit 3B, and the centrifugal fan 4 as in the first and second embodiments. The configuration of the centrifugal fan 4 is the same as in the first and second embodiments. The configuration of the rotating electrical machine 2A is the same as that of the second embodiment.

The control unit 3B controls the operation of the rotating electrical machine 2A as in the first embodiment. However, the external shape of the control unit 3B of this embodiment is a cylindrical shape unlike the first and second embodiments. That is, the control unit 3B of the present embodiment includes a unit channel portion 50B penetrating in the axial direction.
As the centrifugal fan 4 rotates, air flows from one side of the control unit 3B to the other side in the axial direction of the rotary shaft 102 through the unit flow path 50B. The unit flow path part 50B is arranged so as to overlap with the ventilation flow path part 40A of the rotating electrical machine 2A in the axial direction of the rotary shaft 102.

Specifically, the control unit 3B of the present embodiment includes a control circuit unit 51B for controlling the operation of the rotating electrical machine 2A and a case 52B for housing the same, as in the first and second embodiments. And a sealing resin 53 for sealing the control circuit portion 51B in the case 52B.
The control circuit unit 51B includes the same substrate 54B and electronic component 55B as those in the first and second embodiments. The shape of the substrate 54B is different from that of the first and second embodiments, and is formed in, for example, an annular shape in plan view.

The case 52B opens to one side in the thickness direction of the control unit 3B, as in the first embodiment. However, the case 52B of the present embodiment includes an annular bottom wall portion 56B formed in a plate shape having a ring shape in plan view, and an outer peripheral wall portion extending in the thickness direction of the annular bottom wall portion 56B at the outer peripheral edge of the annular bottom wall portion 56B. 57B and an inner peripheral wall portion 58B extending in the thickness direction of the annular bottom wall portion 56B at the inner peripheral edge of the annular bottom wall portion 56B. The inner peripheral wall portion 58B is disposed inside the outer peripheral wall portion 57B in the radial direction.

The accommodation space of the control circuit part 51B in the case 52B is a space between the inner peripheral wall part 58B and the outer peripheral wall part 57B. In the present embodiment, the unit channel portion 50B of the control unit 3B is a space inside the inner peripheral wall portion 58B in the radial direction. The electronic component 55B as a heat source is arranged in the vicinity of the inner peripheral wall portion 58B.

The control unit 3B described above is disposed on one side of the rotating electrical machine 2A so that the axial direction of the unit flow path portion 50B is parallel to the axial direction of the rotary shaft 102. Thereby, the unit flow path part 50B overlaps with the ventilation flow path part 40A and the axial direction of the rotating shaft 102.
In the rotating electrical machine unit 1B shown in FIG. 9, when viewed from the axial direction, only the in-shaft channel 41 of the ventilation channel 40A is located inside the unit channel 50B, and the other ventilation channels 40A The portion (for example, the second through hole 24 of the stator base portion 13) is located outside the unit flow path portion 50B, but is not limited thereto.

For example, the control unit 3B may be arranged so as to overlap the rotating electric machine 2A without any gap, but in the present embodiment, the control unit 3B is arranged with an interval in the axial direction of the rotating shaft 102 with respect to the rotating electric machine 2A.
In the present embodiment, the control unit 3B is directly fixed to the support portion 72 of the attachment portion 70 so as to block one opening of the attachment portion 70 formed in a cylindrical shape. For this reason, the ventilation flow path portion 40A of the rotating electrical machine 2A communicates with the external space only through the unit flow path portion 50B of the control unit 3B. In this configuration, when the centrifugal fan 4 rotates, the air in the external space flows through the unit channel portion 50B of the control unit 3B toward the ventilation channel portion 40A.

Also in the rotating electrical machine unit 1B of the present embodiment, when the centrifugal fan 4 rotates by obtaining a driving force from the engine 100 or the rotating electrical machine 2A, air flows in the vicinity of the control unit 3B and the inner peripheral portion of the rotating electrical machine 2A. After flowing in order through a certain air flow path portion 40A, the air flows from the inside to the outside of the blade portion 62.

More specifically, when the centrifugal fan 4 rotates, the air flows from the external space (one side of the control unit 3B) to the unit flow path of the control unit 3B as shown by an arrow F1B in FIG. It flows into the part 50B and flows in the axial direction. Thereby, air flows along the inner peripheral part (inner peripheral wall part 58B) of the control unit 3B. That is, air flows in the vicinity of the inner periphery of the control unit 3B.
The air that has flowed into the unit channel portion 50B flows out to the other side of the control unit 3B.

As shown by arrows F2B and F3B in FIG. 9, the air that has flowed out to the other side of the control unit 3B flows from one side of the rotating electrical machine 2A into the ventilation passage portion 40A of the rotating electrical machine 2A and flows in the axial direction. The air flow indicated by the arrow F <b> 2 </ b> B is a flow that enters the inner circumferential spaces 29 of the plurality of coils 14 from the plurality of second through holes 24 of the stator base portion 13. The air flow indicated by the arrow F3B is a flow that enters the in-shaft channel 41 of the connecting shaft portion 17A.
The air flow after entering the ventilation flow path section 40A of the rotating electrical machine 2A is the same as that of the second embodiment.

According to the rotating electrical machine unit 1B of the present embodiment, the same effects as those of the first and second embodiments can be obtained.
Furthermore, according to the rotating electrical machine unit 1B of the present embodiment, the unit flow path portion 50B of the control unit 3B and the ventilation flow path portion 40A of the rotating electrical machine 2A are arranged in the axial direction of the rotating shaft 102. For this reason, air can be smoothly flowed from the control unit 3B toward the rotating electrical machine 2A without largely changing the air flow direction. Thereby, the flow velocity of the air flowing in the vicinity of the control unit 3B can be improved, and the control unit 3B can be efficiently cooled.

Further, according to the rotating electrical machine unit 1B of the present embodiment, the electronic component 55 as a heat source is disposed on the inner peripheral portion of the control unit 3B that defines the unit flow path portion 50B. Thereby, this electronic component 55 can be efficiently cooled.

Further, according to the rotating electrical machine unit 1B of the present embodiment, the control unit 3B includes the unit flow path portion 50B. For this reason, compared with the structure of 1st, 2nd embodiment, the space | interval of the rotary electric machine 2A and control unit 3B can be made small or can be eliminated. Thereby, the axial dimension of the rotating electrical machine unit 1B can be reduced, and the rotating electrical machine unit 1B can be reduced in size and thickness.

The configuration of the rotating electrical machine unit 1B of the third embodiment is also applicable to the rotating electrical machine unit 1 of the first embodiment. For example, the rotating electrical machine unit 1 of the first embodiment may include the same control unit 3B as that of the third embodiment. In addition to this, in the rotating electrical machine unit 1 of the first embodiment, the control unit 3B may be arranged so as to overlap the rotating electrical machine 2 without a gap, for example, or directly fixed to the support portion 72 of the mounting portion 70, for example. May be.

In the rotating electrical machine unit 1B of the third embodiment, the control unit 3B may be fixed to the support portion 72 of the attachment portion 70 via the spacer 77, for example, as in the first and second embodiments. In this case, the ventilation flow path section 40A of the rotating electrical machine 2A is external space via both the gap between the rotating electrical machine 2A and the support section 72 and the control unit 3B in the axial direction and the unit flow path section 50B of the control unit 3B. Communicate with.

Although the details of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

In all the embodiments described above, the centrifugal fan may be, for example, a turbo fan.

In all the embodiments described above, the air that flows out of the centrifugal fan (blade part) cools the main body of the engine. However, for example, a radiator for cooling the engine by water cooling may be cooled.

In addition, the rotating electrical machine may constitute, for example, only a starter motor or only a generator.

1, 1A, 1B Rotating electrical machine unit 2, 2A Rotating electrical machine 3, 3B Control unit 4 Centrifugal fan 11 Stator 12, 12A Rotor 17, 17A Connecting shaft part 39 Second end face (end face)
40, 40A Ventilation channel part 41 Axle channel 50B Unit channel part 55, 55B Electronic component (heat source)
61 Blade 62 Blade portion 70 Mounting portion 71 Energizing portion 80A Reinforcement frame 100 Engine 101 Main body portion 102 Rotating axis L1 Axis line

A rotating electrical machine unit according to an aspect of the present invention includes a stator and a rotor that is rotatably provided with respect to the stator and rotates together with a rotating shaft of an engine, and constitutes at least one of a starter motor and a generator. A rotating electric machine, a control unit configured to control the operation of the rotating electric machine, and a blade portion in which a plurality of blades are arranged in a circumferential direction, and rotating the rotating shaft together with the air, A centrifugal fan configured to flow from the inside to the outside, wherein the control unit, the rotating electrical machine, and the centrifugal fan are sequentially arranged in the axial direction of the rotating shaft, and the rotating electrical machine has an inner circumference thereof A ventilation passage section for flowing air from one side of the rotating electrical machine to the other side in the axial direction in accordance with the rotation of the centrifugal fan. Knit, arranged so as to overlap with the ventilation passage section in plan view, the rotary electric machine is an axial gap type rotary electric machine and the said stator rotor is arranged so as to face each other in the axial direction, The rotating electrical machine includes a connecting shaft portion that rotatably connects the stator and the rotor to each other and fixes a relative position between the stator and the rotor in the axial direction, and the ventilation flow path portion The air is formed in the connecting shaft portion, and air is allowed to flow into the connecting shaft portion from the end surface of the connecting shaft portion positioned at one end of the rotating electrical machine in the axial direction, and the one end of the rotating electrical machine in the axial direction. In addition, an in-shaft flow path is provided that flows out from the outer peripheral surface of the connecting shaft portion at a position shifted to the other end side of the rotating electrical machine .

Claims (9)

A rotating electrical machine that includes a stator and a rotor that is rotatably provided with respect to the stator and that rotates together with the rotating shaft of the engine, and constitutes at least one of a starter motor and a generator;
A control unit configured to control the operation of the rotating electrical machine;
A centrifugal fan having a blade portion in which a plurality of blades are arranged in a circumferential direction, and configured to flow air from the inside to the outside of the blade portion by rotating together with the rotation shaft;
With
The control unit, the rotating electrical machine and the centrifugal fan are arranged in order in the axial direction of the rotating shaft,
The rotating electrical machine has an air flow passage portion on its inner peripheral portion that causes air to flow from one side of the rotating electrical machine to the other side in the axial direction as the centrifugal fan rotates.
A rotating electrical machine unit in which the control unit is arranged so as to overlap with the ventilation channel portion in a plan view. 2. The rotating electrical machine unit according to claim 1, wherein the rotating electrical machine is an axial gap type rotating electrical machine arranged so that the stator and the rotor face each other in the axial direction. The rotation according to claim 2, wherein the rotating electrical machine includes a connecting shaft portion that rotatably connects the stator and the rotor and fixes a relative position between the stator and the rotor in the axial direction. Electric unit. The ventilation flow path portion is formed in the connection shaft portion, and air is caused to flow into the connection shaft portion from an end surface of the connection shaft portion located at one end of the rotating electrical machine in the axial direction, and the axial direction. 4. The rotating electrical machine unit according to claim 3, further comprising: an in-shaft flow path that flows out from the outer peripheral surface of the connecting shaft portion at a position shifted toward the other end of the rotating electrical machine from one end of the rotating electrical machine. An attachment portion for attaching the stator to the main body portion of the engine so as to be movable only in the axial direction;
A pair of urging portions disposed on both sides of the stator in the axial direction and urging the stator in the axial direction with respect to the mounting portion;
A rotating electrical machine unit according to claim 4. The rotating electrical machine and the control unit are arranged at an interval in the axial direction,
The rotating electrical machine unit according to any one of claims 1 to 5, wherein air flows from the gap between the rotating electrical machine and the control unit toward the ventilation flow path portion as the centrifugal fan rotates. . The control unit includes a unit flow path portion that penetrates in the axial direction and causes air to flow from one side of the control unit to the other side in the axial direction as the centrifugal fan rotates.
The rotating electrical machine unit according to any one of claims 1 to 6, wherein the unit flow path portion is disposed so as to overlap the ventilation flow path portion in the axial direction. The rotating electrical machine unit according to any one of claims 1 to 7, wherein axes of the centrifugal fan and the rotor coincide with each other. The rotating electrical machine unit according to claim 8, wherein the centrifugal fan and the rotor are integrally fixed via a reinforcing frame.

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