JP4402712B2 - Controller-integrated rotating electrical machine - Google Patents

Description

  The present invention relates to a controller-integrated rotating electrical machine equipped with a power circuit section and a field circuit section, and particularly relates to a configuration for improving the cooling performance and a fixed support configuration for the power circuit section and the field circuit section. It is.

  In the conventional patent document 1 “multi-phase AC rotating electric machine”, fins of a heat sink for cooling a power circuit switching element for energizing a stator are arranged concentrically around a rotation axis. The configuration is described.

JP 2004-282905 A

  In Patent Document 1, the fins of the heat sink that cools the control board including the field circuit that supplies current to the rotor are arranged perpendicular to the rotation axis, and the cooling ability of the control board is poor and the cooling ability is low. There was a need for improvement. In addition, components composed of switching elements and heat sinks (components corresponding to the power circuit portion and field circuit portion of the present application) need to be fixedly supported on a bracket or case. However, depending on the location of the fixed support, the cooling air generated by the rotor fan may obstruct the passage through the fins of the heat sink and impede the cooling performance. However, Patent Document 1 describes the fixed support portion. Absent.

  The controller-integrated rotating electrical machine according to the present invention has been made to solve the above-described problems. The field cooling heat sink fins are arranged in the same direction as the rotation axis to provide a field magnet. The purpose is to improve the cooling performance of the switching element. It is another object of the present invention to propose a fixed support structure for the power circuit portion and the field circuit portion that does not hinder the cooling performance of the power circuit portion and the field circuit portion.

A controller-integrated rotating electrical machine according to the present invention is provided on a stator supported by a bracket, a rotor supported by a rotating shaft supported by the bracket, and provided on one end side of the bracket supported by the rotating shaft. Power transmission section, a field winding provided in the rotor for generating magnetomotive force, a cooling fan provided in the rotor for generating cooling air by rotation of the rotor, and the other end side of the bracket A brush holder having a brush for supplying a current to the field winding, a field circuit unit, and a power circuit unit for supplying a current to the stator, wherein the field circuit unit includes the field winding. A field switching element for controlling the current flowing in the wire and a field cooling heat sink; and the power circuit section and the power circuit switching element for controlling the current flowing in the stator. In a controller-integrated rotating electrical machine including a power circuit cooling heat sink, the power circuit cooling heat sink and the field cooling heat sink are arranged in a substantially annular shape on the other end side of the bracket so as to surround the rotating shaft. A ventilation path between fins of the power circuit cooling heat sink and a ventilation path between fins of the field cooling heat sink are linearly configured in the same direction as the rotation axis, and the field circuit section and A control board for controlling the power circuit unit is disposed between the field circuit unit and the brush holder, and the control board is mounted on the control board cooling heat sink. The fins extend from the control board cooling heat sink to the rotating shaft side, and the ventilation path between the fins of the control board cooling heat sink is the front. Are those configured such that the rotational axis in the same direction.

  Further, in the controller-integrated rotating electrical machine according to the present invention, the power circuit portion is configured as a power circuit sub-assy for each phase, and the fixed support portion to the bracket of the field circuit portion is adjacent. It is provided between the phase power circuit sub-ASSY and the field circuit section.

According to the controller integrated rotary electric machine of the present invention, the cooling air generated by the cooling fan of the rotor flows between the fins of the power circuit cooling heat sink and between the fins of the field cooling heat sink along the rotation axis direction. Not only the power circuit switching element but also the field switching element can be effectively cooled. Furthermore, the cooling air for cooling the control board flows substantially linearly in the direction of the rotation axis until it reaches the fan, so that the cooling performance of the control board can be improved.

  Further, according to the controller integrated rotary electric machine of the present invention, the fixed support portion to the bracket of the field circuit portion is provided between the adjacent phase power circuit sub-assy and the field circuit portion. The field circuit portion can be fixed to the bracket without obstructing the cooling air passing through the fins of the field cooling heat sink.

Embodiment 1 FIG.
1 is a longitudinal sectional view showing the structure of a control device-integrated dynamoelectric machine according to Embodiment 1 of the present invention. FIG. 2 is a rear view showing the structure of the controller-integrated rotating electrical machine according to the first embodiment. FIG. 3 is a rear view showing the structure of the controller-integrated rotating electrical machine according to the first embodiment except for a case on the rear side. A rear bracket (bracket) 1, a stator 3 supported by a front bracket (bracket) 2, and a rotor 4. The rotor 4 includes a field winding 5 that generates magnetomotive force, a slip ring 6, and a cooling fan ( Fan) 7. A rotating shaft 10 is supported on the bracket 2 via a bearing 13 and supports the rotor 4. Reference numeral 14 denotes a pulley which is a power transmission unit, and is supported on the rotary shaft 10 on one end side (front side) of the bracket 2.

  On the other end side (rear side) of the bracket 1, a brush holder 9 having a brush 8 that contacts the slip ring 6, a power circuit unit 20 for supplying AC power to the stator winding 3B, and a field winding 5 A field circuit unit 30 for supplying a current to the power circuit unit 20 is mounted, and a case 40 is disposed behind the power circuit unit 20 and the field circuit unit 30 in the rotation axis direction. In addition, 11 is a nut and 12 is a rotation sensor.

The power circuit unit 20 includes a power circuit switching element 21 (21UH, 21VH, 21WH) on the positive terminal side of the battery among power circuit switching elements that supply current to the armature winding, and a power circuit cooling heat sink 23. (23UH, 23VH, 23WH) mounted on the upper arm;
The power circuit switching element 22 (22UL, 22VL, 22WL) on the negative terminal side of the battery includes a lower arm mounted on the power circuit cooling heat sink 24 (24UL, 24VL, 24WL).
The power circuit unit 20 is composed of a pair for each phase in which the upper arm and the lower arm have three phases, and the surfaces on which the power circuit switching elements of the power circuit cooling heat sink are mounted are the upper arm and the lower arm. The power circuit sub-ASSY (subassembly) 27 (27U, 27V, 27W) is configured.

  The field circuit unit 30 includes a field switching element 31 for supplying current to the field winding 5 and a control IC (not shown) mounted on a field cooling heat sink 32, and a resin case 33 and a field cooling heat sink. The field switching element 31 is included in 32. The fins 32 a of the field cooling heat sink 32 extend in the opposite direction with respect to the rotation axis, and the connection member 34 that supplies current from the field switching element 31 to the brush 8 rotates from the fins 32 a of the field cooling heat sink 32. Arranged on the shaft side and electrically connected to the field switching element 31 and the brush 8.

  The power circuit cooling heat sinks 23 and 24 and the field cooling heat sink 32 are arranged in an approximately annular shape in four directions at 90 ° intervals so as to surround the rotating shaft 10. The ventilation path between 23 a, the ventilation path between the fins 24 a, and the ventilation path between the fins 32 a of the field cooling heat sink 32 are arranged so as to be linear in the same direction as the rotating shaft 10. The case 40 is configured on the other end side of the bracket 1 so as to cover the rear and outer peripheral sides of the power circuit unit 20 and the field circuit unit 30. Ventilation holes 50a facing the fins 23a, 24a of the power circuit cooling heat sinks 23, 24 and ventilation holes 50b facing the fins 32a of the field cooling heat sink 32 are formed at the projected position of the fin in the rotation axis direction with respect to the case 40. Has been.

  The field circuit section 30 has fixed support portions 35 to the bracket 1 outside both ends of the base surface of the field cooling heat sink 32. The fixed support portions 35 of the field circuit section 30 are adjacent to each other. It is arranged between the circuit sub assembly 27 (27U, 27W) and the field circuit section 30, and is fixed to the bracket 1 with screws as shown in FIG. At this time, a predetermined space A is provided in the bracket 1 except for the fixed support portion 35 of the field circuit portion 30 on the surface side facing the bracket in front of the field cooling heat sink 32 and the resin case 33 in the axial direction. To smooth the flow of cooling air. Similarly, a predetermined space B is provided in the bracket 1 except for the fixing support portion 28 of the power circuit sub ASSY 27 on the surface side of the power circuit cooling heat sinks 23 and 24 facing the front bracket in the axial direction. Smooth distribution.

  The power circuit sub assembly 27 has a fixing support portion 28 to the bracket 1 outside both ends of the base surfaces of the power circuit cooling heat sinks 23 and 24, and the fixing support portion 28 is a power circuit sub of the adjacent phase. It is provided between the ASSY 27 or the field circuit unit 30. As shown in FIG. 4, the fixed support portion 28 is composed of a power circuit cooling heat sink 23 (for example, 23 UH, 23 WH) and 24 (for example, 24 UL, 24 WL), and includes a bolt 100 and a nut 101 press-fitted into the bracket 1. It is fixedly supported on the bracket 1 together with the case.

  In the first embodiment, the power circuit cooling heat sinks 23 and 24 and the power circuit switching elements 21 and 22 are electrically insulated by a metal substrate 25 with an insulating layer interposed therebetween. 24 and the power circuit switching elements 21 and 22 are not electrically insulated (when the power circuit cooling heat sinks 23 and 24 are electrodes), the bracket 1, the power circuit cooling heat sink 23, the power The heat sink 24 for circuit cooling can be fixedly supported via an insulating member.

  In the structure of the first embodiment, when the rotor 4 is driven to rotate, the fan 7 is driven, and the cooling air 60a, 60b is provided in the case 40 as shown by the arrows in FIG. From the power circuit unit 20 and the field circuit unit 30 to the heat sinks 23, 24, and 32, and linearly flows between the fins 23a, 24a, and 32a in the direction of the rotation axis. The magnetic switching element 31 is cooled. The cooling air that has cooled the switching elements 21, 22, 31 passes through the ventilation holes 51 a, 51 b provided in the bracket 1, is bent in the centrifugal direction, and cools the stator winding 3 </ b> B and the bracket 1 to the bracket 1. Exhaust holes 52a and 52b are provided.

With this configuration, the connection member 34 that supplies current from the field switching element 31 to the brush 8 does not hinder the flow of the cooling air flowing through the fins 32a of the field cooling heat sink 32. Will flow substantially linearly until it reaches the fan 7, the ventilation resistance is reduced, and the cooling performance of the field switching element 31 can be improved.
In addition, the support portion 35 for fixing the field circuit portion 30 to the bracket 1 is disposed outside both ends of the base surface of the field cooling heat sink 32, and between the adjacent power circuit sub ASSY 27 and the field circuit portion 30. By fixing the field circuit section 30 to the bracket 1, the cooling performance of the field switching element 31 can be improved without impeding the cooling air flowing through the fins 32a of the field cooling heat sink 32. .

  Also in the power circuit unit 20, the fixing support portions 28 to the bracket 1 of the power circuit sub assembly 27 are disposed outside both ends of the base surfaces of the power circuit cooling heat sinks 23, 24, so that the adjacent power circuit sub assembly 27 or By fixing the power circuit sub-ASSY 27 to the bracket 1 between the magnetic circuit unit 30 and the power circuit cooling heatsinks 23 and 24, the power circuit switching is performed without interfering with the cooling air flowing through the fins 23a and 24a. The elements 21 and 22 are effectively cooled.

Embodiment 2
FIG. 5 is a longitudinal sectional view showing the main structure of the controller-integrated dynamoelectric machine according to the second embodiment. FIG. 6 is a rear view showing the structure of the controller-integrated rotating electrical machine according to the second embodiment. In all the drawings, the same reference numerals indicate the same or corresponding parts, and the description may be omitted. In the second embodiment, a control board 70 for controlling the power circuit section and the field circuit section 30 is mounted on the resin case (case) 40 at the rear of the rotation axis of the field circuit section 30, and a field cooling heat sink. The ventilation holes 53 for the 32 fins 32 a are provided at positions on the outer side in the rotational axis radial direction of the fins 32 a of the field cooling heat sink 32 for the case 40.

As in the first embodiment, the fins 32a of the field cooling heat sink 32 extend in the opposite direction with respect to the rotation axis, and the cooling air 60b flowing from the ventilation holes 53 provided in the case 40 is the field cooling heat sink. 32 passes through the fins 32 a of 32, flows into the bracket through the ventilation holes 51 b provided in the bracket 1, and is discharged from the exhaust holes 52 b provided in the bracket 1.
With this configuration, even when the control board 70 is mounted behind the rotation axis of the field circuit unit 30 and it is difficult to form a ventilation hole behind the rotation axis of the field circuit unit 30, Cooling air is effectively generated from the rear of the rotating shaft to the front of the rotating shaft in the fins 32a of the cooling heat sink 32, and the field switching element 31 can be cooled.

Embodiment 3 FIG.
FIG. 7 is a rear view showing the structure of the controller-integrated rotating electrical machine according to the third embodiment, excluding the case on the rear side. The field circuit section 30 and the power circuit sub assembly 27 (27U, 27W) are a common fixed support section 29a disposed between the field circuit section 30 and the power circuit sub assembly 27 (27U, 27W). As shown, the bracket 1 is fixed and supported by a bolt 100 and a nut 101 that are press-fitted into the bracket 1. As shown in FIG. 8, the fixed support portion 29 a includes a case 33 of the field circuit portion 30 and a heat sink 23 (23 UH, 23 WH) and 24 (24 UL, 24 WL) for cooling the power circuit. An insert bush 37 is inserted into the portion 29a.

  The power circuit sub assembly 27 (27U, 27V, 27W) is a common fixed support portion 29b disposed between the power circuit sub assemblies of adjacent phases. As shown in FIG. The nut 101 is fixedly supported on the bracket 1. As shown in FIG. 9, the fixed support portion 29b is a part of the power circuit cooling heat sinks 23 (23UH, 23VH, 23WH) and 24 (24UL, 24VL, 24WL) of the power circuit sub ASSY 27 (27U, 27V, 27W). It consists of

  As described above, the field circuit section 30 and the power circuit sub assembly 27 are fixed to the bracket 1 by using the same fixed support location, and the power circuit sub assembly 27 of each phase is used in common. 30, the space for fixing the power circuit sub assembly 27 is reduced, the field cooling heat sink 32 and the power circuit cooling heat sinks 23 and 24 can be widened, and the ventilation hole of the case 40 can be made large. The cooling of the power circuit switching elements 21 and 22 and the field switching element 31 can be further improved. Moreover, it is possible to reduce parts such as bolts and nuts.

  Further, the fixed support portion of the power circuit sub assembly 27 may be formed by a part of the heat sink for cooling the power circuit. Usually, the heat sink is made of aluminum and has a relatively high strength, and a part of the heat sink having a large weight ratio in the power circuit sub assembly 27 is used as a fixed support portion of the power circuit sub assembly 27, thereby reducing vibration of the power circuit section 20. It is possible to suppress breakage of the connection part inside the power circuit 20 and the connection part with the outside.

Embodiment 4 FIG.
FIG. 10 is a longitudinal sectional view showing the main structure of a control apparatus-integrated dynamoelectric machine according to the fourth embodiment. FIG. 11 is a rear view showing the structure of the controller-integrated dynamoelectric machine according to the fourth embodiment. FIG. 12 is a rear view showing the essential structure of the controller-integrated dynamoelectric machine according to the fourth embodiment, excluding the rear case. A control board 70 for controlling the field circuit section 30 is disposed between the field circuit section 30 and the brush holder 9. The control board 70 is mounted on a control board cooling heat sink 36 for cooling the control board 70. The field switching element 31 and the control board 70 are included in a resin case 33, a field cooling heat sink 32, and a control board cooling heat sink 36.

  Further, the fins 36a of the control board cooling heat sink 36 extend to the rotation axis side, and the ventilation path between the fins 36a of the control board cooling heat sink 36 is configured in the same direction as the rotation axis. As in the first embodiment, the case 40 is provided with ventilation holes 50b at the axial projection positions of the fins 32a of the field cooling heat sink 32, and the axial projection positions of the fins 36a of the control board cooling heat sink 36. Are provided with vent holes 50c for cooling the control board. With this configuration, not only the cooling air 60b that cools the field circuit unit 30, but also the cooling air 60c that cools the control board flows substantially linearly in the rotation axis direction until reaching the fan 7, and the control board The cooling property can be improved.

It is a longitudinal cross-sectional view which shows the structure of the control apparatus integrated rotary electric machine by Embodiment 1 of this invention. FIG. 3 is a rear view showing the structure of the controller-integrated rotating electrical machine according to the first embodiment. FIG. 3 is a rear view showing the structure of the controller-integrated rotating electrical machine according to the first embodiment except for a case on the rear side. FIG. 3 is a cross-sectional view of a fixed portion of the field circuit unit and the power circuit unit according to the first embodiment. Sectional drawing. FIG. 6 is a longitudinal sectional view showing a main part structure of a controller-integrated rotating electrical machine according to a second embodiment. FIG. 6 is a rear view showing the structure of a control device-integrated dynamoelectric machine according to Embodiment 2.

FIG. 10 is a rear view showing the structure of a control device-integrated rotating electrical machine according to Embodiment 3 with the rear case removed. It is sectional drawing of the fixing part of the field circuit part and power circuit part by Embodiment 3. FIG. 6 is a cross-sectional view of a fixing part of a power circuit unit according to a third embodiment. FIG. 10 is a longitudinal sectional view showing a main part structure of a control apparatus-integrated dynamoelectric machine according to Embodiment 4; FIG. 10 is a rear view showing the structure of a control device-integrated dynamoelectric machine according to Embodiment 4. FIG. 10 is a rear view showing the main part of the structure of the controller-integrated dynamoelectric machine according to Embodiment 4 with the rear case removed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bracket 2 Bracket 3 Stator 3B Stator winding 4 Rotor 5 Field winding 6 Slip ring 7 Fan 8 Brush 9 Brush holder 10 Rotating shaft 11 Nut 12 Rotation sensor 13 Bearing 14 Pulley 20 Power circuit section

21 (21UH, 21VH, 21WH) Power circuit switching element 22 (22UL, 22VL, 22WL) Power circuit switching element 23 (23UL, 23VH, 23WH) Power circuit cooling heat sink 24 (24UL, 24VL, 24WL) Power circuit cooling Heat sink 23a fin 24a fin 27 (27U, 27V, 27W) power circuit sub ASSY
28 Fixed support part 29a Fixed support part

29b Fixed support section 30 Field circuit section 31 Field switching element 32 Field cooling heat sink 32a Fin 33 Resin case 34 Connection member 35 Fixed support section 36 Control board cooling heat sink 36a Fin 37 Insert bush 40 Case 50a Ventilation hole 50b Ventilation hole

50c Ventilation hole 51a Ventilation hole 51b Ventilation hole 52a Discharge hole 52b Discharge hole 53 Ventilation hole 60a Cooling air 60b Cooling air 60c Cooling air 70 Control board 100 Bolt 101 Nut

Claims (9)

A stator supported by a bracket,
A rotor supported by a rotating shaft supported by the bracket;
A power transmission unit supported on the rotary shaft and provided on one end side of the bracket;
A field winding provided in the rotor for generating magnetomotive force,
A cooling fan provided on the rotor for generating cooling air by rotation of the rotor, and a brush holder mounted on the other end side of the bracket and having a brush for supplying a current to the field winding, and a field A circuit unit, and a power circuit unit for supplying current to the stator,
The field circuit section includes a field switching element that controls a current flowing through the field winding and a field cooling heat sink, and the power circuit section is for a power circuit that controls a current flowing through the stator. In the controller-integrated dynamoelectric machine including the switching element and the heat sink for cooling the power circuit thereof,
The power circuit cooling heat sink and the field cooling heat sink are arranged in a substantially annular shape on the other end side of the bracket so as to surround the rotating shaft, and a ventilation path between fins of the power circuit cooling heat sink And the ventilation path between the fins of the field cooling heat sink is configured linearly in the same direction as the rotation axis ,
A control board for controlling the field circuit section and the power circuit section is disposed between the field circuit section and the brush holder, and the control board is mounted on a heat sink for cooling the control board, The fins of the control board cooling heat sink extend from the control board cooling heat sink to the rotating shaft side, and the ventilation path between the fins of the control board cooling heat sink is configured to be in the same direction as the rotating shaft . A controller-integrated rotating electrical machine characterized by   A case enclosing the power circuit portion and the field circuit portion is disposed on the other end side of the bracket, and a ventilation hole for the fin of the heat sink for power circuit cooling and a ventilation hole for the fin of the heat sink for field cooling are provided. 2. The controller-integrated rotating electrical machine according to claim 1, wherein the fin is formed at the projection position in the rotation axis direction of the fin with respect to the case. A case containing the power circuit portion and the field circuit portion is disposed on the other end side of the bracket, and a ventilation hole for the fin of the heat sink for cooling the power circuit is projected in the direction of the rotation axis of the fin with respect to the case. Formed in position,
2. The control device integrated type according to claim 1, wherein a ventilation hole for the fin of the field cooling heat sink is provided at an outer position in a radial direction of the rotation axis of the fin of the field cooling heat sink with respect to the case. Rotating electric machine.   The fins of the field cooling heat sink extend from the field cooling heat sink in the opposite direction to the rotation axis, and the connection member for supplying current from the field switching element to the brush is the field cooling heat sink. 4. The controller-integrated rotating electrical machine according to claim 2, wherein the rotating electrical machine is disposed on the side of the rotating shaft. The power circuit unit is configured as a power circuit sub-assy for each phase, and the fixed support part to the bracket of the field circuit unit is the power circuit sub-assy of the adjacent phase and the field circuit unit The control apparatus-integrated dynamoelectric machine according to any one of claims 1 to 4 , wherein the controller-integrated dynamoelectric machine is provided therebetween. The power circuit unit is configured as a power circuit sub-assy for each phase, and the fixing support part to the bracket of the power circuit sub-assy is provided between the power circuit sub-assemblies of adjacent phases. The control apparatus-integrated dynamoelectric machine according to any one of claims 1 to 5 , wherein: The fixed support part of the field circuit part to the bracket and the fixed support part of the power circuit sub-ASSY of the phase adjacent to the field circuit part are fixedly supported by the bracket at a common location. The control device-integrated rotating electrical machine according to claim 5 . The power circuit of each is provided between the sub ASSY said power fixed support of circuit sub ASSY of adjacent phases, according to claim 6, characterized in that it is fixedly supported on the bracket at a common point Controller-integrated rotating electrical machine. 9. The controller-integrated dynamoelectric machine according to claim 6, wherein the fixed support portion of the power circuit sub assembly is a part of the heat sink for cooling the power circuit.

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