JP2012249371A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine equipped with a power circuit section, capable of reducing the number of manufacturing processes, shortening the time required to fix the power module and an electric power interconnection component to a heat sink, and improving manufacturing yield, and excellent in productivity.SOLUTION: In a rotary electric machine equipped with a power circuit section mounted and formed on a first mounting face of a heat sink by an adhesive, an electric power interconnection component is mounted on a second mounting face of the heat sink by the adhesive, in a face on the opposite side of a face with projecting inner wall and outer wall parts of an insulator forming the electric power interconnection component, and a power module is disposed in an opening of the electric power interconnection component.

Description

  The present invention relates to a rotating electrical machine in which a control device is mounted on a rotating electrical machine main body.

  There is known a rotating electrical machine in which a control device is mounted on a rotating electrical machine main body. The control device includes: a plurality of power modules that control power from the rotating electrical machine main body and the battery to adjust input / output of the rotating electrical machine; a power interconnection component that includes a plurality of conductor terminals connected to each power module; and a heat sink And is installed in the motor housing.

For example, the control device installed in the motor housing includes a ring-shaped bottom plate portion, a ring-shaped outer peripheral wall portion protruding from the outer peripheral edge of the bottom plate portion, and a ring-shaped inner peripheral wall portion protruding from the inner peripheral edge of the bottom plate portion. There is an inverter case provided with a frame wall portion connecting the outer peripheral wall portion and the inner peripheral wall portion, and a rotating electrical machine constituted by a power module fixed to the bottom surface portion of the inverter case.
In addition, this control device has a bottom part made of metal and serves as a heat sink, and bus bars are arranged on the outer peripheral wall part, the inner peripheral wall part, and the frame wall part of the inverter case. (For example, refer to Patent Document 1).

Japanese Patent No. 4123436 (page 6-7, Fig. 4)

  In the rotating electrical machine described in Patent Document 1, in the manufacture of the power circuit unit, the outer peripheral wall portion, the inner peripheral wall portion, and the frame wall portion are fixed to the bottom surface portion that forms the heat sink, and the power is fixed. The fixing of the module is performed by a different means, and two steps of fixing the power module to the heat sink and fixing the power interconnection component to the heat sink are necessary.

Also, when fixing the power module by soldering, the power interconnect components are fixed after fixing the power module to the heat sink, so the power interconnect components are placed accurately while avoiding interference with the connection terminals of the power module. And it takes time to fix the power interconnect components.
Further, when the power interconnection component is fixed to the heat sink with an adhesive, the adhesive adheres to an unnecessary portion of the adhesive, thereby causing a problem and reducing the yield.

  That is, in the rotating electrical machine described in Patent Document 1, when manufacturing the power circuit unit, the number of manufacturing steps is increased, and it takes time to fix the power interconnection components, and the yield decreases. There was a problem.

  The present invention has been made to solve the above-described problems, and reduces the number of manufacturing processes, shortens the time for fixing the power module and the power interconnection component to the heat sink, and improves the manufacturing yield. It is possible to provide a rotating electrical machine in which a control device having a power circuit unit excellent in productivity is integrally mounted.

  A rotating electrical machine according to the present invention includes a stator, a rotor that is disposed inside the stator, has a rotation shaft on an axis, and is rotatable with respect to the stator, and a case that supports the stator and the rotor. A power circuit unit disposed in a case on one side of the stator in the axial direction and electrically connected to the stator winding of the stator, and power from the DC power source A rotating electrical machine including a control device having a field circuit unit that adjusts and supplies a field current to a rotor winding of a rotor as a field current, wherein the power circuit unit includes a plurality of power modules, a power module, and a field module. The magnetic circuit unit includes a power interconnection component having a conductor connected to each of the magnetic circuit unit, and an annular heat sink on which the power module and the power interconnection component are mounted. The connecting part is formed of a conductor and an insulator integrated with the conductor by insert molding, and the insulator is an annular body provided with a rotation shaft insertion hole through which the rotation shaft passes substantially at the center. And an inner wall portion and an outer wall portion that are provided on the flat wall portion and project from one surface of the flat wall portion. Provided at the outer peripheral edge of the wall, a plurality of openings are provided in the flat wall between the inner wall and the outer wall, and the conductor is installed at a position radially inside the insulator from the opening. A positive bus bar, and a negative bus bar, an armature connection terminal, and a field connection terminal installed at a position radially outside the insulator from the opening. The circuit portion is disposed in the opening of the power interconnection component and The positive terminal of the road section and the positive terminal of the power module are connected to the positive bus bar, the negative terminal of the field circuit section and the negative terminal of the power module are connected to the negative bus bar, and the AC terminal of the power module is connected to the armature Connected to the terminal, the field terminal of the field circuit section is connected to the field connection terminal, and the power interconnection component is on the opposite side of the surface from which the inner wall and the outer wall of the insulator protrude. A certain back surface is attached to the second attachment surface of the heat sink with an adhesive, and the power module is attached to the first attachment surface of the heat sink with an adhesive.

  In the rotating electrical machine according to the present invention, the power circuit unit includes a plurality of power modules, a power interconnection component having a conductor connected to each of the power module and the field circuit unit, and the power module and the power interconnection component. An annular heat sink to be mounted, the power module is disposed in the opening of the power interconnection component, the positive terminal of the power module is connected to a positive bus bar which is a conductor, and the negative terminal of the power module is a conductor Connected to the negative busbar, the AC terminal of the power module is connected to the armature connection terminal, which is a conductor, and the power interconnection component is on the opposite side of the surface from which the inner wall and outer wall of the insulator protruded Is attached to the second mounting surface of the heat sink with an adhesive, and the power module is in contact with the first mounting surface of the heat sink. It is attached by the agent, and it can reduce the number of manufacturing processes, shorten the time for fixing the power module and power interconnection parts to the heat sink, and improve the manufacturing yield, resulting in excellent productivity. Yes.

It is side surface sectional drawing which shows the rotary electric machine concerning Embodiment 1 of this invention. It is side surface sectional drawing which shows the part by the side of the rear in the rotary electric machine concerning Embodiment 1 of this invention. It is a front view which shows the power circuit part and field circuit part of the control apparatus in the rotary electric machine concerning Embodiment 1 of this invention. It is a front view of the electric power interconnection component in the rotary electric machine concerning Embodiment 1 of this invention. It is side surface sectional drawing which shows the attachment structure to the heat sink of the power module and electric power interconnection component in the rotary electric machine concerning Embodiment 1 of this invention. It is side surface sectional drawing which shows the attachment structure to the heat sink of the power module and electric power interconnection component in the rotary electric machine concerning Embodiment 2 of this invention. It is side surface sectional drawing which shows the attachment structure to the heat sink of the power module and electric power interconnection component in the rotary electric machine concerning Embodiment 3 of this invention.

Embodiment 1 FIG.
FIG. 1 is a side cross-sectional view showing a rotating electrical machine according to Embodiment 1 of the present invention.
As shown in FIG. 1, the rotating electrical machine 1 of the present embodiment is a control device-integrated rotating electrical machine having a rotating electrical machine body 2 and a control device 3 mounted on the rotating electrical machine body 2.
In the present embodiment, rotating electric machine 1 is an AC generator motor (motor generator).

The rotating electrical machine main body 2 includes a cylindrical stator 4, a rotor 5 that is disposed inside the stator 4 and is rotatable with respect to the stator 4, and a case (support) that supports the stator 4 and the rotor 5. Body) 6.
The case 6 includes a front bracket 7 and a rear bracket 8 that sandwich the stator 4 in the axial direction of the rotor 5, and a plurality of fastening bolts 9 that tighten between the front bracket 7 and the rear bracket 8. The front bracket 7 and the rear bracket 8 are made of metal.

The stator 4 has a cylindrical stator core 10 fixed to each of the front bracket 7 and the rear bracket 8, and a stator winding (armature winding) 11 provided on the stator core 10. ing.
The rotor 5 includes a rotating shaft 12 disposed on the axis of the rotor 5, a rotor core 13 fixed to an intermediate portion of the rotating shaft 12, and a rotor winding (field) provided on the rotor core 13. Magnetic winding) 14.
The rotating shaft 12 passes through the front bracket 7 and the rear bracket 8. The rotating shaft 12 is rotatably supported by the front bracket 7 and the rear bracket 8 via bearings 15.

The outer peripheral portion of the rotor core 13 faces the inner peripheral portion of the stator 4. The rotor core 13 is provided with a cooling fan 16 for blowing air that is rotated integrally with the rotor 5.
A pulley 17 is fixed to the end of the rotating shaft 12 on the front bracket 7 side. The pulley 17 is wound around a transmission belt (not shown) that interlocks with the rotating shaft of the engine.

A rotation position detection sensor 18 that generates a signal corresponding to the rotation of the rotation shaft 12 is provided at the end of the rotation shaft 12 on the rear bracket 8 side.
Further, a plurality of slip rings 19 electrically connected to the rotor winding 14 are provided in a portion between the rotor core 13 and the rotational position detection sensor 18 of the rotary shaft 12.
The slip ring 19 is an annular conductive member that surrounds the outer periphery of the rotating shaft 12. The slip ring 19 is in contact with a conductive brush 20 for supplying a field current for generating a magnetic field to the rotor 5 to the slip ring 19.

  The rear bracket 8 is provided with a brush holder 21 that guides the brush 20 in a direction in which the brush 20 comes in contact with or separates from each slip ring 19. The brush holder 21 is provided with a pressing spring 22 that individually biases each brush 20 in a direction in contact with each slip ring 19. Each brush 20 is pressed against the slip ring 19 by the urging force of the pressing spring 22. When the rotor 5 is rotated, the slip ring 19 is slid with respect to the brush 20.

The control device 3 is provided to be supported by the rear bracket 8.
The control device 3 includes a power circuit unit 23 electrically connected to the stator winding 11, and a field circuit that adjusts the power from the battery (DC power supply) and supplies it as a field current to the rotor winding 14. Unit 24, control circuit unit 25 for controlling each of power circuit unit 23 and field circuit unit 24, and transmission / reception of control signals between control circuit unit 25 and each of power circuit unit 23 and field circuit unit 24 And a signal relay device 26 for performing the above.

A signal from the rotational position detection sensor 18 is sent to the control circuit unit 25. Further, the control circuit unit 25 is provided with a connector 27 for external connection for transmitting and receiving signals to and from an external device (for example, an engine control unit). The control circuit unit 25 controls the field circuit unit 24 and the power circuit unit 23 based on information from each of the external device and the rotational position detection sensor 18.
The field circuit unit 24 adjusts the field current to the rotor winding 14 under the control of the control circuit unit 25. The field current adjusted by the field circuit unit 24 is supplied to the rotor winding 14 of the rotor 5, and a magnetic field is generated in the rotor 5.

The power circuit unit 23 converts the power received from the stator winding 11 (the rotating electrical machine body 2) or the power supplied to the stator winding 11 (the rotating electrical machine body 2) under the control of the control circuit unit 25 into an alternating current. Convert between DC.
That is, under the control of the control circuit unit 25, the power circuit unit 23 converts the DC power from the battery into AC power and supplies the AC power to the stator winding 11, and converts the AC power from the stator winding 11 into DC power. Convert and supply to the battery.

The signal relay device 26 is provided in the signal relay component 28 provided with the signal wiring electrically connected to each of the power circuit portion 23 and the field circuit portion 24, and the signal relay component 28, and the control circuit portion. 25, and a signal relay connector 29 connected to 25.
Transmission / reception of signals between each of the power circuit unit 23 and the field circuit unit 24 and the control circuit unit 25 is performed via the signal relay device 26.

FIG. 2 is a side sectional view showing a rear side portion of the rotating electrical machine according to the first embodiment of the present invention.
FIG. 3 is a front view showing a power circuit section and a field circuit section of the control device in the rotary electric machine according to Embodiment 1 of the present invention.
1 is a cross-sectional view taken along line II in FIG. 3, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.
As shown in FIGS. 2 and 3, the power circuit portion 23 and the field circuit portion 24 are disposed around the rotating shaft 12 inside the rear bracket 8.

The field circuit unit 24 includes a flat rectangular parallelepiped field circuit unit main body 30, and a positive terminal 31 of the field circuit unit and a negative terminal 32 of the field circuit unit that protrude from the side surface of the field circuit unit main body 30. And a plurality of field terminals 33 and a plurality of field circuit portion signal terminals 34. Each terminal 31, 32, 33, 34 projecting from the side surface of the field circuit body 30 is bent and extends in a direction opposite to the rotor core 13 direction.
The field circuit section main body 30 is disposed with its thickness direction aligned with the axial direction of the rotary shaft 12. Of the four side surfaces of the field circuit body 30, the positive terminal 31 of the field circuit portion is provided on the side surface close to the rotating shaft 12, and the negative side of the field circuit portion is disposed on the side surface away from the rotating shaft 12. A terminal 32 and a field terminal 33 are provided, and a circuit portion signal terminal 34 is provided on the remaining two side surfaces.

The power circuit unit 23 includes a plurality of (six in this embodiment) power modules 35, and a power interconnection component 36 having a plurality of conductors connected to each of the power modules 35 and the field circuit unit 24. Each of the power modules 35 and the power interconnection component 36 is provided with an annular heat sink 37 and has an annular shape surrounding the rotating shaft 12.
As shown in FIG. 2, the heat sink 37 is a plate-like member that is disposed perpendicularly to the axis of the rotary shaft 12 and that is provided with a hole through which the rotary shaft 12 is inserted substantially at the center. Is supported by the rear bracket 8 in a state of surrounding.

The heat sink 37 also has a field circuit portion 24 mounted thereon. The common circuit circuit portion 24 and each power module 35 are attached to the surface of the heat sink 37 opposite to the rotor core 13 side. The first mounting surface 37a and the second mounting surface 37b to which the power interconnection component 36 is mounted. The first and second attachment surfaces 37 a and 37 b are flat surfaces that are perpendicular to the axis of the rotating shaft 12.
A cooling fin 37 c is provided on the surface of the heat sink 37 on the side of the rotor core 13, and heat from the field circuit unit 24, each power module 35, and the power interconnection component 36 is transferred from the heat sink 37 to the fin. It is transmitted to 37c and dissipated to the outside air through the fin 37c.

As shown in FIG. 3, the field circuit unit 24 and each power module 35 are disposed in the opening 38 of the power interconnection component 36.
The field circuit unit 24 and each power module 35 are arranged at intervals in the circumferential direction of the rotary shaft 12 so as to surround the rotary shaft 12.

Each power module 35 includes a flat rectangular parallelepiped module main body 39, a power module positive terminal 40, a power module negative terminal 41, a power module AC terminal 42, and a plurality of power modules. It is formed by the signal terminal 43 of the power module.
The terminals 40, 41, 42, 43 that protrude from the side surfaces of the module main body 39 are bent and extend in the direction opposite to the direction of the rotor core 13.

Further, the module main body 39 is arranged such that the thickness direction thereof coincides with the axial direction of the rotary shaft 12.
Of the four side surfaces of the module body 39, the positive terminal 40 is provided on the side surface close to the rotating shaft 12, the negative terminal 41 and the AC terminal 42 are provided on the side surface remote from the rotating shaft 12, and the rest The signal terminals 43 are provided on the two side surfaces.

Moreover, the module main body 39 is produced by integrating a switching element with insulating resin by insert molding.
For example, a power transistor, MOSFET, or IGBT is used as the switching element. By repeating this ON / OFF switching operation by the switching element, the power circuit unit 23 performs power conversion between direct current and alternating current.

FIG. 4 is a front view of the power interconnection component in the rotating electrical machine according to the first embodiment of the present invention.
As shown in FIG. 4, the power interconnection component 36 includes a positive bus bar 44, a negative bus bar 45, an armature connection terminal 46, a field connection terminal 47, and a positive bus bar 44 as a conductor. The bus bar 45, the armature connection terminal 46, and the field connection terminal 47 are formed of an insulator 48. For the insulator 48, for example, an insulating resin is used from the viewpoint of moldability.

The insulator 48 is an annular body provided with a hole (referred to as a rotation shaft insertion hole) 68 through which the rotation shaft 12 passes substantially at the center, and includes a positive bus bar 44, a negative bus bar 45, and an armature connection terminal 46. It is integrated with the field connection terminal 47 by insert molding.
The insulator 48 includes a flat wall portion 62, and an inner wall portion 60 and an outer wall portion 61 provided on the flat wall portion 62 and projecting from one surface of the flat wall portion 62.
The flat wall portion 62 is provided with a plurality of openings 38 to avoid the positive bus bar 44, the negative bus bar 45, the armature connection terminal 46, and the field connection terminal 47.

The inner wall portion 60 is provided so as to surround the periphery of the rotation shaft insertion hole 68, the outer wall portion 61 is provided at the outer peripheral edge portion of the flat wall portion 62, and each opening 38 is provided between the inner wall portion 60 and the outer wall portion 61. The flat wall portion 62 is provided.
That is, the inner wall portion 60 is provided at a position inside the radial direction of the insulator 48 from the opening portion 38, and the outer wall portion 61 is located at a position outside the opening portion 38 in the radial direction of the insulator 48. 38 is provided so as to surround it.

Further, by attaching to the heat sink 37 a surface opposite to the surface from which the inner wall portion 60 and the outer wall portion 61 protrude (referred to as the back surface of the insulator) in the flat wall portion 62 of the insulator 48, the inner wall portion 60 and the outer wall portion A recess having the heat sink 37 as a bottom surface is formed between the first and second members 61.
As shown in FIG. 3, the field circuit section 24 and each power module 35 are disposed in the opening 38 of the insulator 48 in the power interconnection component 36, that is, in the recess.

The positive bus bar 44, the plurality of negative bus bars 45, the plurality of armature connection terminals 46, and the plurality of field connection terminals 47 serve as power wirings for the power modules 35 and the field circuit unit 24. Yes.
The positive bus bar 44 is installed on the inner wall portion 60 of the insulator 48.
That is, the positive bus bar 44 is installed at a position radially inward from the opening 38 and is arranged radially inward of the field circuit section 24 and each power module 35 as shown in FIG. Yes.

The negative bus bar 45, the armature connection terminal 46, and the field connection terminal 47 are installed on the periphery of the insulator 48.
That is, the negative bus bar 45, the armature connection terminal 46, and the field connection terminal 47 are installed at positions radially outward from the opening 38, and as shown in FIG. And it arrange | positions in the position of radial direction outer side rather than each power module 35. FIG.

As shown in FIG. 4, the positive bus bar 44 includes an annular portion 49 that surrounds the periphery of the rotation shaft insertion hole 68, and a positive terminal connection portion for the field circuit portion that is provided at an interval in the annular portion 49. 50a and a plurality of module positive terminal connection portions 50b, and a power supply terminal portion 51 provided in the annular portion 49 and electrically connected to the battery.
Further, the positive bus bar 44 is integrated with the insulator 48 in a state where the positive terminal connection portions 50 a and 50 b and the power supply terminal portion 51 are exposed from the insulator 48.
As shown in FIG. 3, the positive terminal 31 of the field circuit unit 24 arranged in the opening 38 is connected to the positive terminal connection unit 50a for the field circuit unit by, for example, welding, and the positive terminal connection for each module. The positive terminal 40 of each power module 35 disposed in the opening 38 is connected to the terminal connection portion 50b.

The positive terminal connection portions 50 a and 50 b and the power supply terminal portion 51 protrude from the annular portion 49 in the same direction as the protruding direction of the inner wall portion 60, and when the power interconnection component 36 is mounted on the heat sink 37, the annular portion 49 is in a state of protruding in the axial direction of the rotary shaft 12 from 49.
The positive bus bar 44 is manufactured by bending a strip-shaped conductor provided with the positive terminal connection portions 50a and 50b and the power supply terminal portion 51 into a cylindrical shape and connecting the end portions to each other. Examples of the strip-shaped conductor include a metal plate.
The positive terminal 31 of the field circuit section and the positive terminal 40 of each power module are arranged to extend in parallel to the positive terminal connection sections 50a and 50b.

As shown in FIG. 4, the negative bus bar 45 includes a flat plate portion 52, a field circuit negative terminal connection portion 53 a and a plurality of module negative terminal connection portions 53 b provided on the flat plate portion 52. ing.
Further, the negative bus bar 45 is integrated with the insulator 48 in a state where the peripheral portion of the bolt through hole 55 (a part of the flat plate portion 52) and the negative terminal connection portions 53a and 53b are exposed from the insulator 48. Has been.
As shown in FIG. 3, the negative terminal 32 of the field circuit section 24 disposed in the opening 38 is connected to the negative terminal connection section 53a for the field circuit section by, for example, welding, and a plurality of modules. The negative terminal 41 of each power module 35 disposed in the opening 38 is connected to the negative terminal connecting portion 53b for example by welding or the like.

Each negative terminal connecting portion 53a, 53b protrudes from the flat plate portion 52 in the same direction as the protruding direction of the outer wall portion 61. When the power interconnection component 36 is mounted on the heat sink 37, the rotating shaft 12 It will be in the state of projecting in the axial direction.
The flat plate portion 52 is provided with a bolt through hole 55 through which a bolt 54 (shown in FIG. 1) for fixing the power circuit portion 23 to the rear bracket 8 is passed.
The negative bus bar 45 is produced by bending a plate-shaped metal piece.
The negative terminal 32 of the field circuit section and the negative terminal 41 of each power module are arranged to extend in parallel to the negative terminal connection sections 53a and 53b.

As shown in FIG. 1, the power interconnection component 36 and the heat sink 37 are mechanically fastened to the rear bracket 8 together by bolts 54.
The negative bus bar 45 is grounded to the rear bracket 8 by mechanically fastening the peripheral portion of the bolt through hole 55 to the rear bracket 8 with a bolt 54.

As shown in FIG. 4, the armature connection terminal 46 includes a terminal main body portion 56 that is electrically connected to the stator winding 11, and an AC terminal connection portion 57 provided in the terminal main body portion 56. ing. The armature connection terminal 46 is integrated with the insulator 48 in a state where a part of the terminal main body portion 56 and the AC terminal connection portion 57 are exposed from the insulator 48.
As shown in FIG. 3, the AC terminal 42 of each power module 35 disposed in the opening 38 is connected to the AC terminal connection portion 57 by, for example, welding.
The armature connection terminal 46 is manufactured by bending a plate-shaped metal piece.
The AC terminal 42 of each power module is disposed so as to extend in parallel to the AC terminal connection portion 57.

  As shown in FIG. 4, the field connection terminal 47 is provided on the terminal body 58 and the terminal body 58 that is electrically connected to the rotor winding 14 via the brush 20 and the slip ring 19. Field terminal connection portion 59. The field connection terminal 47 is integrated with the insulator 48 in a state where a part of the terminal main body 58 and the field terminal connection 59 are exposed from the insulator 48.

As shown in FIG. 3, the field terminal 33 of the field circuit part 24 disposed in the opening 38 is connected to the field terminal connection part 59 by, for example, welding.
The field connection terminal 47 is fabricated by bending a plate-shaped metal piece.
The field terminal 33 of the field circuit section 24 is arranged to extend in parallel with the field terminal connection section 59.
As shown in FIG. 2, the power interconnection component 36 is fixed to the heat sink 37 by attaching the back surface of the insulator 48 to the second attachment surface 37 b of the heat sink 37.

The signal relay component 28 is disposed in a recess formed between the inner wall portion 60 and the outer wall portion 61 in a state of facing the field circuit portion 24 and each power module 35.
The signal wiring of the signal relay component 28 is connected to the signal terminal 34 of the field circuit section and the signal terminal 43 of each power module.
The signal relay connector 29 connects the signal wiring of the signal relay component 28 and the control circuit unit 25.

As shown in FIG. 2, a recessed portion formed between the inner wall portion 60 and the outer wall portion 61 is filled with an insulating filler 63 such as a resin.
That is, the field circuit unit 24, the signal relay component 28, and each power module 35 are embedded in the filler 63.

Next, operation | movement of the rotary electric machine 1 of this Embodiment is demonstrated.
The power circuit unit 23 and the field circuit unit 24 in the control device 3 are controlled by the control circuit unit 25 based on information from the rotational position detection sensor 18 and the external device.
When the engine is started, DC power from the battery is supplied to each of the power circuit unit 23 and the field circuit unit 24.
In the field circuit unit 24, an operation for adjusting the DC power supplied from the battery to the field current is performed under the control of the control circuit unit 25. The field current from the field circuit unit 24 is supplied to the rotor winding 14 via the brush 20 and the slip ring 19, and a DC magnetic field is generated in the rotor 5.

On the other hand, in each power module 35 of the power circuit unit 23, a switching operation is performed under the control of the control circuit unit 25, and DC power from the battery is converted into AC power.
The AC power converted by the power circuit unit 23 is supplied to the stator winding 11, and a rotating magnetic field is generated in the stator 4 to rotate the rotor 5. The pulley 17 is rotated by the rotation of the rotor 5 and the engine is started.

After the engine is started, rotational power from the engine is transmitted to the pulley 17, the rotor 5 is rotated, and AC power is induced in the stator winding 11.
At this time, in each power module 35, a switching operation is performed under the control of the control circuit unit 25, and AC power induced in the stator winding 11 is converted into DC power. Thereafter, the DC power from the power circuit unit 23 is charged to the battery.

FIG. 5 is a side sectional view showing a structure for attaching the power module and the power interconnection component to the heat sink in the rotating electrical machine according to the first embodiment of the present invention.
As shown in FIG. 5, the rotating electrical machine 1 of the present embodiment includes a positive terminal 40, a negative terminal 41, an AC terminal 42, and a signal terminal 43 (the negative terminal 41 is not shown) of each power module 35 in the control device 3. The surface opposite to the side from which () extends (referred to as the adhesive surface of the power module) is attached to the first attachment surface 37 a of the heat sink 37 with an adhesive 64.
In addition, the back surface of the insulator 48 forming the power interconnection component 36 (referred to as an adhesion surface of the power interconnection component) is attached to the second attachment surface 37 b of the heat sink 37 with an adhesive 64.

As shown in FIG. 5, the heat sink 37 is provided with a separation groove 67 that divides the first mounting surface 37a and the second mounting surface 37b. The first mounting surface 37a and the second mounting surface 37b are on the same plane.
In the present embodiment, the heat sink 37 is provided with the separation groove 67 that divides the first mounting surface 37a and the second mounting surface 37b. However, the step is not flat on the surface of the power module 35 on the heat sink side. If so, the separation groove 67 may not be provided.
Further, the first mounting surface 37a and the second mounting surface 37b may be on different planes.

  In the rotating electrical machine 1 according to the present embodiment, the power interconnection component 36, the power module 35, and the heat sink 37 in the control device 3 are configured as described above, and the power interconnection component 36 is attached to the heat sink 37 in the second attachment. Since the power module 35 is attached to the surface 37 b with the adhesive 64 and the power module 35 disposed in the opening 38 of the power connection component 36 is attached to the first attachment surface 37 a of the heat sink 37 with the adhesive 64. The interconnection component 36 and the power module 35 can be attached to the heat sink in a lump, and the adhesive curing process can be performed only once, so that the manufacturing process of the control device can be shortened and the productivity is improved.

Further, attaching the power interconnection component 36 and the power module 35 together to the heat sink can prevent the adhesive from adhering to unnecessary portions and also prevent the yield from decreasing.
In particular, when the heat sink 37 is provided with the separation groove 67 that separates the first mounting surface 37a and the second mounting surface 37b, even if the application amount of the adhesive is excessive, it adheres to each terminal connection portion. The agent can be prevented from entering, and the yield can be prevented from decreasing.

When the first mounting surface 37 a and the second mounting surface 37 b of the heat sink 37 are on the same plane, screen printing can be used for applying the adhesive 64 to the heat sink 37. The adhesive 64 can be applied all at once, so that the waste of the adhesive can be eliminated, the adhesive can be applied with high accuracy, the adhesive adheres to an unnecessary place, and a defect occurs, resulting in a decrease in yield. Can be prevented.
In addition, since the adhesive application process only needs to be performed once, productivity is also improved from this aspect.
Further, if the same bonding method as that of the power module 35 is used in the field circuit section 24, the assembly process of the power circuit section 23 and the field circuit section 24 becomes common, and the productivity is further improved.

Embodiment 2. FIG.
FIG. 6 is a side sectional view showing a structure for attaching a power module and a power interconnection component to a heat sink in the rotating electrical machine according to the second embodiment of the present invention.
As shown in FIG. 6, in the rotating electrical machine of the present embodiment, each power module in the control device is attached to the first attachment surface 37 a of the heat sink 37 by the first adhesive 64 a on the adhesive surface. The power interconnection component is the same as that of the rotating electrical machine of the first embodiment except that the adhesive surface is attached to the second attachment surface 37b of the heat sink 37 by the second adhesive 64b.

In the present embodiment, since the adhesive for attaching the power module 35 to the heat sink 37 and the adhesive for attaching the power interconnection component 36 to the heat sink 37 are different, even if the heat generation amount of the power circuit unit is large, An adhesive having high thermal conductivity and excellent electrical insulation is used only for mounting the power module 35 occupying most of the power module 35, and the filler 63 leaks when mounting the power interconnection component 36 to the heat sink 37. It is possible to use an adhesive having excellent sealing properties to prevent the above.
Adhesives with excellent sealing properties are inexpensive, and adhesives with high thermal conductivity and excellent electrical insulation are expensive. However, since expensive adhesives are used only for mounting the power module 35, Manufacturing cost can be reduced.

In the present embodiment, the adhesive application process is performed twice, but when the first mounting surface 37a and the second mounting surface 37b of the heat sink 37 are on the same plane, screen printing is used. Similar to the first embodiment, the waste of the adhesive can be eliminated, the adhesive can be applied with high accuracy, the adhesive adheres to an unnecessary place, and a defect occurs, resulting in a decrease in yield. Can be prevented.
Further, similarly to the first embodiment, the power connection interconnection component 36 and the power module 35 can be attached to the heat sink in a lump, and the adhesive curing process can be performed only once. Can be shortened and productivity can be improved.

Embodiment 3 FIG.
FIG. 7 is a side cross-sectional view showing a structure for attaching a power module and a power interconnection component to a heat sink in a rotating electrical machine according to Embodiment 3 of the present invention.
As shown in FIG. 7, the rotating electrical machine according to the present embodiment includes an insulator that is provided with an adhesive holding groove 66 on the second mounting surface 37b of the heat sink 37 and is an adhesive surface of the power interconnection component in the control device. Rib 65 is provided on the back surface of 48, and the second adhesive agent in which the rib 65 inserted in the adhesive holding groove 66 is stored in the adhesive holding groove 66 is attached to the heat sink 37 of the power interconnection component 36. The rotating electrical machine of the second embodiment is the same as that of Embodiment 2 except that the fixing is performed at 64b.

In the present embodiment, the second adhesive 64 b can be prevented from protruding to the inner and outer peripheral ends of the heat sink 37.
Further, since the seal length of the second mounting surface 37b of the heat sink 37 is increased, the sealing performance of the bonding portion between the heat sink 37 and the power interconnection component 36 is improved.
Moreover, since the sealing performance of the bonding portion between the heat sink 37 and the power interconnection component 36 is improved, the radial width of the second mounting surface 37b of the heat sink 37 can be reduced. That is, the heat sink 37 can be reduced, and the power circuit unit 23 can be reduced in size.

  The adhesive used in this embodiment is different from the adhesive that attaches the power module to the heat sink and the adhesive that attaches the power interconnection component to the heat sink. However, as in Embodiment 1, both adhesives are the same. It may be.

  The rotating electrical machine according to the present invention is used in rotating electrical machines that require improvement in yield and productivity because the power module and the power interconnection components in the control device can be fixed to the heat sink together with an adhesive.

1 rotating electrical machine, 2 rotating electrical machine main body, 3 control device, 4 stator, 5 rotor,
6 Case, 11 Stator winding, 12 Rotating shaft, 14 Rotor winding,
23 power circuit section, 24 field circuit section, 31 positive terminal, 32 negative terminal,
33 field terminals, 34 signal terminals, 35 power modules,
36 power interconnect components, 37 heat sink, 37a first mounting surface,
37b second mounting surface, 37c fin, 38 opening, 40 positive terminal, 41 negative terminal,
42 AC terminal, 43 signal terminal, 44 positive bus bar, 45 negative bus bar,
46 Armature connection terminal, 47 Field connection terminal, 48 Insulator,
50a, 50b positive terminal connection part, 51 power supply terminal part, 53a, 53b negative terminal connection part,
57 AC terminal connection part, 59 field terminal connection part, 60 inner wall part, 61 outer wall part,
62 flat wall portion, 63 filler, 64 adhesive, 64a first adhesive,
64b Second adhesive, 65 rib, 66 adhesive retaining groove, 67 separation groove,
68 Rotating shaft insertion hole.

Claims (5)

Rotation having a stator, a rotor disposed on the inner side of the stator and provided with a rotation shaft on an axis and rotatable with respect to the stator, and a case for supporting the stator and the rotor An electric body, a power circuit unit disposed in the case on one side of the stator in the axial direction and electrically connected to the stator winding of the stator, and power from a DC power source A rotating electrical machine comprising a control device having a field circuit section for adjusting and supplying a field current to the rotor winding of the rotor as a field current,
The power circuit unit includes a plurality of power modules, a power interconnection component having a conductor connected to each of the power module and the field circuit unit, and the power module and the power interconnection component. An annular heat sink, and is formed around the rotating shaft,
The power interconnection component is formed of the conductor and an insulator integrated with the conductor by insert molding,
The insulator is an annular body provided with a rotation shaft insertion hole through which the rotation shaft passes substantially in the center, and is provided on the flat wall portion and the flat wall portion and protrudes from one surface of the flat wall portion. An inner wall portion and an outer wall portion, the inner wall portion is provided so as to surround the periphery of the rotation shaft insertion hole, the outer wall portion is provided at an outer peripheral edge portion of the flat wall portion, and the inner wall portion and the A plurality of openings are provided in the flat wall portion between the outer wall portion,
The conductor includes a positive bus bar installed at a position radially inward of the insulator from the opening, and a negative bus bar and an electric machine installed at a position radially outside the insulator from the opening. It is made up of a child connection terminal and a field connection terminal.
The power module and the field circuit unit are disposed in an opening of the power interconnection component, and a positive terminal of the field circuit unit and a positive terminal of the power module are connected to the positive bus bar, The negative terminal of the magnetic circuit unit and the negative terminal of the power module are connected to the negative bus bar, the AC terminal of the power module is connected to the armature connection terminal, and the field terminal of the field circuit unit is It is connected to the above field connection terminal,
The power interconnection component is attached to the second attachment surface of the heat sink with an adhesive on the back surface, which is the surface opposite to the surface from which the inner wall portion and the outer wall portion of the insulator protrude, and the power module Is a rotating electrical machine attached to the first mounting surface of the heat sink by an adhesive.   The rotating electrical machine according to claim 1, wherein the first mounting surface and the second mounting surface of the heat sink are on the same plane.   The first adhesive for attaching the power module to the first attachment surface of the heat sink is different from the second adhesive for attaching the power interconnection component to the second attachment surface of the heat sink. The rotating electrical machine according to claim 1 or 2.   An adhesive holding groove is provided on the second mounting surface of the heat sink, a rib is provided on the back surface of the insulator which is an adhesive surface of the power interconnection component, and the rib inserted into the adhesive holding groove is used as the adhesive. The rotating electrical machine according to any one of claims 1 to 3, wherein the power interconnection component is attached to the heat sink by being fixed with an adhesive stored in a holding groove.   The rotating electrical machine according to any one of claims 1 to 4, wherein the heat sink is provided with a separation groove that divides the first mounting surface and the second mounting surface.

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