JP2011130576A - Rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electric machine which facilitates assembling and replacement of a circuit unit and has high reliability. <P>SOLUTION: A stator circuit unit and a field circuit unit are mounted on a heat sink of the rotary electric machine. The stator circuit unit and the field circuit unit are connected to a control circuit unit controlling the stator circuit unit and field circuit unit via a relay board having a cable connected to a connector disposed on the heat sink with one end connected to the stator circuit unit with the field circuit unit and the other end connected separably to the control circuit unit. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine, and more particularly to a rotating electrical machine integrated with a control device.

  For example, in a control device-integrated rotating electrical machine for a vehicle, since the field current switching circuit unit and the stator current switching circuit unit are connected to the control circuit unit, assembly work and replacement work are easy and reliable. As such, various ideas have been made. In a conventional connector structure for electrical equipment, a connector housing is integrally formed in a case that accommodates a printed circuit board, and a terminal is inserted into a terminal holding portion configured in the connector housing from the opposite side of the board to a through hole of the board. It has been proposed that the terminal is provided with a stress relaxation portion. According to this proposal, a connector housing is formed integrally with a case that accommodates a board, a through hole into which a terminal having a stress relaxation portion can be inserted from the outside, and the terminal is inserted into a through hole of the board. It has been shown that the terminal can be inserted into the through hole and fixed in one operation (see, for example, Patent Document 1).

JP-A-10-233284

  However, when such a conventional connection structure is applied to, for example, a rotating electrical machine for automobiles, a through hole is provided in the substrate storage case to extend to the outside through the terminal conductor, so that the resin for protecting the substrate portion It was difficult to prevent the leakage from the through hole to the outside. Further, it is impossible to prevent water from entering between the connectors connected to each other. Further, Patent Document 1 discloses that a stator current switching circuit unit, a field current switching circuit unit, and a control circuit unit, which are arranged on a relatively large substrate, particularly in a rotating electrical machine for a vehicle, have high reliability. A configuration for easily connecting and disconnecting is not disclosed at all.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rotating electrical machine that is easy to assemble and replace a circuit part and has high reliability.

  Therefore, the rotating electrical machine of the present invention includes a bracket for holding the rotor and the stator, a heat sink provided in the bracket, and a stator circuit provided on the heat sink and energizing the stator with the stator current. A field circuit unit that is provided on the heat sink and supplies a field current to the rotor; a control circuit unit that is attached to the bracket and controls the stator circuit unit and the field circuit unit; A relay board having a wiring provided on the heat sink and connected to a connector connected at one end to the stator circuit portion and the field circuit portion and detachably connected to the control circuit portion at the other end It is characterized by having.

  According to the present invention, the assembling and exchanging operations of the circuit portion of the rotating electrical machine are facilitated, and the reliability is increased.

It is side surface sectional drawing of the rotary electric machine by Embodiment 1 of this invention. FIG. 2 is a schematic rear view showing positions of a wiring member and a brush holder in a rear bracket in a state where a front bracket, a rotor, and a rotating shaft are removed from the rotating electric machine of FIG. 1. It is a schematic front view which shows the state where the power circuit part and field circuit part which were mounted in the heat sink of the rotary electric machine of FIG. 1 were enclosed by the case. FIG. 4 is a schematic front view showing a state where a relay board is mounted on the case shown in FIG. 3. It is an expanded sectional view of the connector of the rotary electric machine shown in FIG. 1, and its peripheral part. It is a schematic front view of the relay connector shown in FIG. It is an expanded sectional view of the connector of the rotary electric machine by Embodiment 2 of this invention, and its peripheral part. It is a schematic front view of the relay connector shown in FIG. It is an expanded sectional view of the connector of the rotary electric machine by Embodiment 3 of this invention, and its peripheral part.

  Embodiments of the present invention will be described below.

Embodiment 1 FIG.
1 to 6 show a controller-integrated rotating electrical machine as an embodiment of the rotating electrical machine of the present invention. The rotating electrical machine includes a rotor 3 provided on the rotating shaft 1 and wound with a field winding 2, a stator 5 provided around the rotor 3 and wound with a stator winding 4, and a fixed A front bracket 7 that supports the child 5 on the inner periphery and rotatably supports one end of the rotary shaft 1 by a bearing 6, and a rotary bracket 1 that is combined with the front bracket 7 is rotatably supported by a bearing 8 inside. A rear bracket 11 that houses electrical circuit portions such as a stator circuit portion 9 and a field circuit portion 10 that are power circuit portions, and attached to the outside of the end wall of the rear bracket 11, the stator circuit portion 9 and the field circuit And a control circuit unit 12 that controls an electric circuit unit such as the unit 10. A magnetic pole position detection sensor that includes a rotor 13 that rotates together with the rotating shaft 1 and a stator 14 that surrounds the rotor 13 on the control circuit unit 12 side of the rotating shaft 1 and detects the rotating state of the rotor 3. 15 is provided.

  A pulley 16 for performing input / output with respect to the rotating electrical machine is provided at an end of the rotating shaft 1 on the side protruding from the front bracket 7, and a portion between the bearing 8 of the rear bracket 11 and the rotor 3. The two slip rings 17 are assembled, and a brush 19 that is held by the brush holder 18 and is in sliding contact with the slip ring 17 is provided inside the rear bracket 11.

  As shown in FIGS. 1 and 2, the rear bracket 11 includes a cylindrical peripheral wall 20 combined with the front bracket 7, an end wall 21 that closes one end of the peripheral wall 20, and an inward direction from the center of the end wall. A hollow cylindrical wall 22 extending coaxially and supporting the bearing 8 is provided inside, and a substantially annular space is formed between the cylindrical wall 22 and the peripheral wall 20. In this annular space, a heat sink 24 having a substantially perforated disk shape or an annular plate shape and having radiation fins 23 on the rotor side surface is provided. The stator circuit portion 9 and the field circuit portion 10 are provided on the other surface of the heat sink 24, that is, the surface on the control circuit portion 12 side, and these electric circuit portions and field windings are provided by the wiring member 26. 2 and the stator winding 4 are electrically connected.

  FIG. 3 shows a state where the case 25 is attached with an adhesive or the like on the surface of the heat sink 24 provided with the stator circuit portion 9 and the field circuit portion 10 with an adhesive or the like. Is shown. That is, the stator circuit portion 9 for supplying AC power to the stator winding 4 and the field circuit portion 10 for supplying current to the field winding 2 are joined to the surface of the heat sink 24 on the control circuit portion side. Has been. Most of this surface of the heat sink 24 is covered with a flat plate portion of a flat case 25, and the stator circuit portion 9 and the field circuit portion 10 are accommodated in an opening 27 provided in the case 25 and exposed. is doing. The periphery of the opening 27 is surrounded by an intermediate flat portion 28 which is carved at a low position from the case 25 and is thinned. The case 25 is provided with signal terminals 29 for connecting the stator circuit portion 9 and the field circuit portion 10 to each other or to other circuits by insert molding, and these signal terminals 29 are provided in the case 25. Are connected to the respective circuit portions 9 or 10 by wire bonding or the like.

  As shown in FIG. 4, the case 25 is placed on the assembly as shown in FIG. 3 in which the stator circuit portion 9 and the field circuit portion 10 are connected to the signal terminals 29 of the case 25 in this way. A relay board 31 provided with a connector 30 for positioning and mounting on the lowered intermediate plane part 28 and connecting to the control circuit part 12 is provided. The relay substrate 31 receives terminals 32 of the case 25 to which the stator circuit portion 9 and the field circuit portion 10 are connected by insert molding, printed wiring, and the like, and a terminal 32 that allows easy connection. Wiring 33 (schematically shown by several broken lines in FIG. 4) for transmitting the signal from the control circuit section 12 to the control circuit section 12. A terminal conductor 34 for connection is formed.

  With the relay board 31 having the connector 30 arranged and connected in this manner, the sealing resin 35 is injected into the opening 27 of the case 25 and the intermediate flat part 28 of the case 25 is covered so as to cover the relay board 31. Also, by injecting the sealing resin 35, the electronic circuit is sealed with resin.

  The number of control signal terminals 29 is increased by dispersing and joining the stator circuit portion 9 and the field circuit portion 10 on the same heat sink 24. In addition, the signal terminal 29 needs to be connected to the control circuit unit 12 outside the rear bracket 11. However, since the signal terminals 29 are scattered on the heat sink 24, Connection is difficult. Therefore, as shown in FIG. 3, by using the relay substrate 31, the signal terminals 29 dispersedly arranged on the heat sink 24 can be concentrated on the connector 30 by the wiring 33 and easily connected to the control circuit unit 12. it can.

  On the rear side of the rear bracket 11, in the illustrated example, on the end wall 21 of the rear bracket 11, there is a resin case 36, a control board 37 on which a microcomputer that is housed in the resin case 36 and controls a motor is mounted, and a relay A control circuit unit 12 that includes a relay connector 38 that is connected to the connector 30 of the substrate 31, an external circuit 39 for exchanging signals with an external circuit with a vehicle, and a rotating electrical machine, and is resin-sealed with a resin 40. Is provided. The terminal conductor 41 of the relay connector 38 is provided in the resin case 36 by insert molding.

  As shown in FIGS. 5 and 6, the terminal conductor 41 is insert-molded in the resin case 36 by stacking pre-molds 42 and 43. The pre-mold 43 is provided with a convex portion 44 and the mating pre-mold 42 is provided with a concave portion 45, which is insert-molded in a state of being stacked and fixed. The connector 30 and the relay connector 38 of the relay board 31 are connected with the rear bracket 11 interposed therebetween through a hole provided in the rear bracket 11. A packing 46 is provided between the connector 30 and the relay connector 38 to provide a waterproof connector structure.

  The stator 14 of the magnetic pole position detection sensor 15 is integrally attached to the resin case 36 of the control circuit unit 12 by fitting or insert molding. The signal wire of the stator 14 is welded or soldered to the terminal conductor 41 insert-molded in the resin case 36 and connected to the control board 37. After assembling the control board 37 and the stator 14, the resin case 36 is filled with the resin 40, and a metal cover 47 for protecting the inside of the case is mounted behind the resin case 36.

  As described above, according to the rotating electrical machine of the present invention, assembly is facilitated by connecting the stator circuit portion 9, the field circuit portion 10 and the case 25 with the connector. Moreover, the replacement work at the time of failure of the control circuit unit 12 is facilitated. In addition, filling the power circuit part and the case with resin ensures waterproofness of the circuit part, and providing a waterproof structure for the connector fitting part prevents water from entering the connector part. it can.

Embodiment 2. FIG.
7 is an enlarged view of a cross section of the connector portion showing Embodiment 2 of the present invention, and FIG. 8 is a front view of the connector portion of the case 25 as viewed from the control circuit portion 12 side. The function of the controller-integrated rotating electrical machine is the same as that of the controller-integrated rotating electrical machine described in the first embodiment, and a description thereof will be omitted.

  A bending portion 48 is provided in the terminal conductor 41 of the relay connector 38 provided in the case 25. In the soldering portion 49 of the board through hole of the terminal conductor 41, stress due to thermal expansion and contraction of the terminal conductor 41 is relieved and fatigue failure is prevented.

The terminal conductors 34 and 41 are made of brass, and the linear expansion coefficient is 17 to 18 × 10 ^ −6 / ° C. The resin material of the housing of the connectors 30 and 36 is defined as the linear expansion coefficient of the terminal. It is characterized by being made of equivalent materials. For example, PA66: linear expansion coefficient (19 to 23 × 10 ⁻⁶ / ° C.). Other configurations are the same as those described in the first embodiment.

  According to such a configuration, since the linear expansion coefficients are made equal, the expansion and contraction of the housings 30 and 36 due to temperature changes and the expansion and contraction of the terminal conductors 34 and 41 become equivalent, and the fretting of the male / female terminal conductor contact portion Abrasion can be prevented.

Embodiment 3 FIG.
FIG. 9 is an enlarged view of the cross section of the connector portion showing Embodiment 3 of the present invention. The function of the controller-integrated rotating electrical machine is the same as that of the controller-integrated rotating electrical machine described in the first embodiment, and a description thereof will be omitted.

  As shown in FIG. 9, the bending portion 50 is provided on the terminal conductor 34 of the connector 30 provided on the relay substrate 31. By providing the bending portion 50, the soldering portion 51 of the board through hole of the terminal conductor 34 is relieved of stress due to thermal expansion and contraction of the terminal conductor, thereby preventing fatigue failure. Further, the stress at the fitting portion of the terminal conductor is also absorbed by the bending portion 50, and fretting wear at the contact portion of the male / female terminal conductor can be prevented. Other configurations are the same as those described in the first embodiment.

  As is apparent from the above description, the rotating electrical machine of the present invention is provided on the brackets 7 and 11 that hold the rotor 3 and the stator 5, the heat sink 24 provided in the brackets 7 and 11, and the heat sink 24. A stator circuit portion 9 for supplying a stator current to the stator 5, a field circuit portion 10 provided on the heat sink 24 for supplying a field current to the rotor 3, and brackets 7 and 11. A control circuit unit 12 for controlling the stator circuit unit 9 and the field circuit unit 10, and a heat sink 24, which is connected to the stator circuit unit 9 and the field circuit unit 10 at one end and a control circuit at the other end And a relay board 31 having a wiring 33 connected to a connector 30 that is detachably connected to the section 12.

  Further, the relay substrate 31 is provided on the heat sink 24 and separately surrounds the stator circuit unit 9 and the field circuit unit 10 distributed on the heat sink 24, so that the stator circuit unit 9 and the field circuit are separated. The case 25 having the signal terminals 29 respectively connected to the portion 10 may be resin-sealed. The wiring 33 of the relay substrate 31 may have a terminal 32 connected to the signal terminal 29 of the case 25. The control circuit unit 12 may include a relay connector 38 that is detachably connected to the connector 30 of the relay board 31 in a waterproof manner. The connector 30 of the relay board 31 may have a terminal conductor 34 that is insert-molded in the connector 30. At least one of the connector 30 of the relay board 31 and the relay connector 38 of the control circuit unit 12 may have terminal conductors 34 and 41 having stress-absorbing bending portions. Further, the connector 30 and the relay connector 38 may have the same coefficient of linear expansion of the material of the connector housing as that of the material of the terminal conductors 34 and 41.

  The apparatus illustrated and described above is merely an example, and various modifications are possible, and the features of each specific example can be used altogether or selectively combined.

  The present invention can be used for a rotating electrical machine, particularly, a controller-integrated rotating electrical machine for a vehicle.

  1 rotation shaft, 2 field windings, 3 rotors, 4 stator windings, 5 stators, 6 bearings, 7 front brackets, 8 bearings, 9 stator circuit sections, 10 field circuit sections, 11 rear brackets, DESCRIPTION OF SYMBOLS 12 Control circuit part, 13 Rotor, 14 Stator, 15 Magnetic pole position detection sensor, 16 Pulley, 17 Slip ring, 18 Brush holder, 19 Brush, 20 Perimeter wall, 21 End wall, 22 Cylindrical wall, 23 Radiation fin, 24 Heat sink, 25 Case, 26 Wiring member, 27 Opening, 28 Middle plane, 29 Signal terminal, 30 Connector, 31 Relay board, 32 terminal, 33 Wiring, 34 Terminal conductor, 35 Sealing resin, 36 Resin case, 37 Control board, 38 Relay connector, 39 External connector, 40 Resin, 41 Terminal conductor, 42 Pre-mold, 43 Pre-mold, 4 protrusion 45 recess 46 packing 47 metal cover 48 bending portion 49 soldering portion 50 bending portion 51 soldering portion.

Claims (7)

A bracket for holding the rotor and stator,
A heat sink provided in the bracket;
A stator circuit portion provided on the heat sink and energizing a stator current to the stator;
A field circuit portion provided on the heat sink and energizing a field current to the rotor;
A control circuit unit that is attached to the bracket and controls the stator circuit unit and the field circuit unit;
A relay board provided on the heat sink and having wiring connected to a connector connected to the stator circuit part and the field circuit part at one end and detachably connected to the control circuit part at the other end; A rotating electric machine comprising:   The relay board is provided on the heat sink and surrounds the stator circuit portion and the field circuit portion distributed on the heat sink independently, and the stator circuit portion and the field circuit portion The rotating electrical machine according to claim 1, wherein each of the rotating electrical machines is sealed with resin in a case having signal terminals connected thereto.   The rotating electrical machine according to claim 1 or 2, wherein the wiring of the relay board has a terminal connected to the signal terminal of the case.   The rotating electrical machine according to any one of claims 1 to 3, wherein the control circuit unit includes a relay connector that is detachably connected to the connector of the relay board in a waterproof manner.   The rotating electrical machine according to any one of claims 1 to 4, wherein the connector of the relay board has a terminal conductor that is insert-molded in the connector.   6. The connector according to claim 1, wherein at least one of the connector of the relay board and the relay connector of the control circuit section has a terminal conductor having a stress absorbing bending section. Rotating electric machine.   The rotating electrical machine according to any one of claims 1 to 6, wherein the connector and the relay connector have the same coefficient of linear expansion of the material of the connector housing as that of the material of the terminal conductor.

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