JP2018186588A - Controller-integrated rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller-integrated rotary electric machine capable of improving vibration resistance of a controller.SOLUTION: A controller-integrated rotary electric machine comprises a rotary electric machine body 2 and a controller 3 which is arranged in the rotary electric machine body 2 and transmits and receives power with the rotary electric machine body 2. The controller 3 comprises: a power module 25; a control board 26 for controlling the power module 25; fins 31 which are installed on the circuit board 26 and comprise vertical sections 311 extending in a direction vertical to a component mounting face in the circuit board 26; a case 28 for surrounding the power module 25, the control board 26 and the fins 31; and silicone gel 29 filled inside the case 28.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a rotating electrical machine main body and a controller-integrated rotating electrical machine that integrates a rotating electrical machine body and a control device that transmits and receives power to and from the rotating electrical machine body.

  2. Description of the Related Art Conventionally, a control device-integrated rotating electrical machine in which a rotating electrical machine body and a control device that transmits and receives power between the rotating electrical machine body are integrated, the control device converts DC power into AC power, and A controller-integrated dynamoelectric machine having a power circuit unit that converts AC power into DC power and a control circuit unit that controls the power circuit unit is known. The power circuit unit has a plurality of molded power modules, and each power module is disposed on a heat sink. The control circuit unit has a control board, and a terminal of the power module is connected to the control board (see, for example, Patent Document 1).

International Publication No. 2014/188803

  However, when the control device-integrated rotating electrical machine is installed and used in the engine room, the control board vibrates, which causes a problem that the vibration resistance of the control device is poor.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a controller-integrated dynamoelectric machine that can improve the vibration resistance of the controller.

  A controller-integrated rotating electrical machine according to the present invention includes a rotating electrical machine main body, and a control device that is provided in the rotating electrical machine main body and transmits and receives electric power to and from the rotating electrical machine main body, and the control device includes a power module, A control board for controlling the power module, a fin provided on the control board and including a vertical portion extending in a direction perpendicular to the component mounting surface of the control board, a case surrounding the power module, the control board and the fin, A gel-like viscoelastic member filled inside the case.

  According to the control device-integrated dynamoelectric machine according to the present invention, the control device surrounds the fin including the vertical portion extending in the direction perpendicular to the component mounting surface of the control board, the power module, the control board, and the periphery of the fin. Since the case and the gel-like viscoelastic member filled inside the case are provided, the vibration resistance of the control device can be improved.

It is sectional drawing which shows the control apparatus integrated rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view which shows the power module and control board | substrate potted with the silicone gel of FIG. It is arrow sectional drawing seen along the III-III line of FIG. It is arrow sectional drawing seen along the IV-IV line of FIG. FIG. 6 is a plan view showing a modification of the control device-integrated rotating electrical machine according to the first embodiment. It is arrow sectional drawing seen along the VI-VI line of FIG. It is arrow sectional drawing seen along the VII-VII line of FIG. It is a top view which shows the control apparatus integrated rotary electric machine which concerns on Embodiment 2 of this invention. It is arrow sectional drawing seen along the IX-IX line of FIG. It is arrow sectional drawing seen along the XX line of FIG. It is a top view which shows the control apparatus integrated rotary electric machine which concerns on Embodiment 3 of this invention. It is arrow sectional drawing seen along the XII-XII line | wire of FIG. It is arrow sectional drawing seen along the XIII-XIII line | wire of FIG.

  Hereinafter, a controller-integrated rotating electrical machine according to an embodiment of the present invention will be described with reference to the drawings. In each figure, the X direction, the Y direction, and the Z direction are shown for clarity of explanation. In addition, this invention is not limited to the following description, In the range which does not deviate from the summary of this invention, it can change suitably. In each figure, for easy understanding, the scale of each member may be different from the actual scale, and configurations not related to the features of the present invention are omitted.

Embodiment 1 FIG.
Embodiment 1 shows an example in which a controller-integrated rotating electrical machine is mounted on a vehicle and applied to an AC generator motor used for driving assistance and power generation. 1 is a cross-sectional view showing a control device-integrated dynamoelectric machine according to Embodiment 1 of the present invention.

  A controller-integrated rotating electrical machine 1A according to Embodiment 1 of the present invention includes a rotating electrical machine main body 2 and a control device 3 that transmits and receives electric power between the rotating electrical machine main body 2 and the rotating electrical machine main body 2. The rotating electrical machine body 2 includes a rotating shaft 4 and a rotor 5 fixed to the rotating shaft 4. The rotor 5 includes a rotor core 6 and a rotor winding 7 wound around the rotor core 6.

  The rotating electrical machine main body 2 is provided on the front bracket 8, the rear bracket 9 provided adjacent to the front bracket 8 in the axial direction, the bearing 10 provided on the front bracket 8, and the rear bracket 9. And a bearing 11. The rotating shaft 4 is rotatably supported by the front bracket 8 and the rear bracket 9 via the bearing 10 and the bearing 11.

  The rotating electrical machine main body 2 includes a stator 12 that is sandwiched and held between the front bracket 8 and the rear bracket 9 in the axial direction. The stator 12 includes a stator core 13 and a stator winding 14 wound around the stator core 13.

  The rotating electrical machine main body 2 is installed on a pulley 15 attached to an end of the rotating shaft 4 protruding outward from the front bracket 8 and a portion of the rotating shaft 4 protruding outward from the rear bracket 9. And a rotational position detecting device 16 for detecting the rotational state of the motor.

  The rotating electrical machine main body 2 includes a pair of slip rings 17 that supply current to the rotor core 6, a pair of brushes 18 that are in sliding contact with the slip rings 17, and a brush holder 19 that holds the pair of brushes 18. I have.

  The control device 3 includes a power circuit unit 20 electrically connected to the stator winding 14, a field circuit unit 21 electrically connected to the rotor winding 7, the power circuit unit 20 and the field circuit. A control circuit unit 22 that controls the unit 21 and a heat sink 23 that cools the power circuit unit 20 and the control circuit unit 22 are provided. The heat sink 23 is made of an aluminum alloy that is inexpensive and has good thermal conductivity. The heat sink 23 is fixed to the rear bracket 9. On the surface of the heat sink 23 on the rear bracket 9 side, heat radiating fins 24 for increasing the cooling capacity are formed.

  The power circuit unit 20 includes six power modules 25 mounted on the surface of the heat sink 23 opposite to the surface on which the radiation fins 24 are formed. The power module 25 is formed by molding using an insulating resin. The power module 25 incorporates two MOSFETs (Metal-Oxide-Semiconductor-Field-Effect-Transistor) as switching elements. The power module 25 includes a power supply wiring 251 that is electrically connected to an external battery (not shown), a stator winding wiring (not shown) that is electrically connected to the stator winding 14, and a control circuit unit 22. A control signal terminal 252 connected to the control board 26 and a ground wiring 253 having the same potential with respect to the heat sink 23 are provided. The control signal terminal 252 is a lead portion of the power module 25. Two sets of three-phase inverter circuits are formed by the six power modules 25.

  The field circuit unit 21 includes one field module 27 mounted on the same surface as the surface on which the power module 25 is mounted in the heat sink 23. The field module 27 is formed by molding using an insulating resin. The field module 27 includes a power supply wiring 271 electrically connected to an external battery (not shown), a brush wiring (not shown) for energizing the brush 18, and a control signal connected to the control board 26 in the control circuit unit 22. A terminal 272 and a ground wiring (not shown) having the same potential with respect to the heat sink 23 are provided. For the control board 26, a glass epoxy resin having good electrical characteristics and mechanical characteristics is used as a base material. A component 261 for controlling the power circuit unit 20 and the field circuit unit 21 is mounted on the control board 26.

  The control device 3 further includes a case 28 fixed to the heat sink 23. The case 28 is fixed to the heat sink 23 using screws and an adhesive. The case 28 surrounds the power module 25, the field module 27, and the control board 26. The case 28 is formed using a thermoplastic resin such as PPS (Poly Phenylene Sulfide), PBT (Poly Butylene Terephthalate). The case 28 has a shape in which openings are formed in the ceiling and bottom.

  The control device 3 is filled with a silicone gel 29 that is a gel-like viscoelastic member filled inside the case 28. The power module 25, the field module 27, and the control board 26 are integrally potted by the silicone gel 29.

  The control device-integrated rotating electrical machine 1 </ b> A includes a control device cover 30 provided on a portion of the control device 3 opposite to the rear bracket 9. The control device 3 is surrounded by a rear bracket and a control device cover 30.

  The controller-integrated dynamoelectric machine 1A according to Embodiment 1 of the present invention has a function of an electric motor that assists driving and a function of a generator that generates electric power.

  Next, a case where the control apparatus-integrated dynamoelectric machine 1A functions as an electric motor will be described. When the controller-integrated rotating electrical machine 1A functions as an electric motor, DC power supplied from an external battery to the power circuit unit 20 is converted into three-phase AC power by ON / OFF control of switching elements of the power circuit unit 20. And supplied to the stator winding 14.

  Further, the DC power supplied from the external battery to the field circuit unit 21 is supplied to the rotor winding 7 adjusted by the field circuit unit 21. As a result, a rotating magnetic field is generated around the rotor winding 7 and the rotating shaft 4 rotates.

  The rotational force of the rotary shaft 4 is transmitted to an engine (not shown) via a pulley 15 and a transmission belt (not shown) wound around the pulley 15. The control circuit unit 22 controls the power circuit unit 20 and the field circuit unit 21 based on information input from an external device and information input from the rotational position detection device 16.

  Next, a case where the control apparatus-integrated rotating electrical machine 1A functions as a generator will be described. When the controller-integrated rotating electrical machine 1A functions as a generator, the rotational force of the engine is transmitted to the rotating shaft 4 via the transmission belt and the pulley 15. As a result, the rotor 5 rotates and three-phase AC power is excited in the stator winding 14. The control circuit unit 22 converts the three-phase AC power excited in the stator winding 14 into DC power by ON / OFF control of the switching element of the power circuit unit 20. The converted DC power is supplied to an external battery, and this battery is charged.

  Next, the potting structure by the silicone gel 29 will be described in detail. 2 is a plan view showing the power module 25 and the control board 26 potted by the silicone gel 29 of FIG. 1, FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2, and FIG. It is arrow sectional drawing seen along line IV-IV.

  The power module 25 is disposed on the surface of the heat sink 23 opposite to the surface on the rear bracket 9 side through a high thermal conductive insulating resin (not shown). The power supply wiring 251 and the ground wiring 253 of the power module 25 are connected to the copper power supply wiring 281 and the ground wiring 282 formed integrally with the case 28 by welding, respectively.

  The control device 3 includes fins 31 fixed on both sides of the control board 26. Each fin 31 has a vertical portion 311 extending in a direction perpendicular to the component mounting surface of the control board 26. The fins 31 are made of a light insulating resin having excellent mechanical properties, such as a glass epoxy resin that is the same material as the control board 26 and PPS that is the same material as the case 28. The fins 31 are fixed to the base portion of the control board 26 using an adhesive (not shown) and screws (not shown).

  A plurality of control signal terminals 252 in the power module 25 are connected to the control board 26 using solder 32.

  The fins 31 fixed to the control board 26 are disposed inside the case 28. Further, the fin 31 is potted with a silicone gel 29 together with the power module 25 and the field module 27.

  The plate-shaped control substrate 26 arranged in the silicone gel 29 is resistant to vibration and impact in the direction perpendicular to the component mounting surface, in other words, the Z-direction, which is the direction in which the contact area with the silicone gel 29 is large. On the other hand, the damping force acts greatly. On the other hand, the control board 26 has a small damping force acting on vibrations and shocks in the direction parallel to the component mounting surface, in other words, the direction of small contact area, in other words, the X direction and the Y direction.

  However, since the fin 31 having the vertical portion 311 extending in the direction perpendicular to the component mounting surface of the control board 26 is fixed to the control board 26, the direction parallel to the component mounting surface of the control board 26 is fixed. The damping force also acts greatly on the vibrations and shocks.

  Since the fins 31 are fixed not to the component 261 mounted on the control board 26 but to the base material portion of the control board 26, the damping force may be concentrated on the component 261. It acts on the entire control board 26.

  As described above, according to the control apparatus-integrated dynamoelectric machine 1A according to the first embodiment of the present invention, any vibration and impact in the X direction, the Y direction, and the Z direction from the outside can be achieved. The vibration of the control board 26 is attenuated, and the control board 26 itself can be prevented from cracking, the component 261 mounted on the control board 26 falling off, the cracks occurring in the solder 32, etc., and the vibration resistance of the control device 3 can be improved. become.

  Further, since the fins 31 are arranged on both surfaces of the control board 26, the contact area between the silicone gel 29 and the fins 31 is increased, and a larger damping force acts on the control board 26 in a balanced manner.

  Further, since the fins 31 are made of a lightweight resin, the controller-integrated rotating electrical machine 1A having high vibration resistance can be provided without reducing the natural frequency of the control board 26.

  5 is a plan view showing a modification of the controller-integrated rotating electrical machine 1A according to the first embodiment, FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 5, and FIG. It is arrow sectional drawing seen along the VII-VII line. The fin 31 may include a vertical portion 311 extending in a direction perpendicular to the component mounting surface of the control board 26 and a parallel portion 312 extending in a direction parallel to the component mounting surface of the control board 26. A groove 313 having the same width as the base material of the control board 26 is formed in the vertical part 311, and the peripheral part of the base material of the control board 26 is sandwiched in the groove 313. Thereby, the control board 26 and the fins 31 are fixed to each other. In this case, since the fin 31 is fixed to the peripheral portion of the control board 26 having a large vibration displacement, the vibration can be attenuated more efficiently and the positioning of the fin 31 and the control board 26 can be easily fixed. Thus, the productivity of the control device-integrated rotating electrical machine 1A is improved.

Embodiment 2. FIG.
8 is a plan view showing a control apparatus-integrated dynamoelectric machine according to Embodiment 2 of the present invention, FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. 8, and FIG. It is arrow sectional drawing seen along-X-ray. In the second embodiment, as in the first embodiment, an example in which the controller-integrated rotating electrical machine is mounted on a vehicle and applied to an AC generator motor used for driving assistance and power generation will be described. In the control apparatus-integrated dynamoelectric machine 1B according to the second embodiment of the present invention, the configuration of the control board 26, the configuration of the fins 31, and the fixing method between the control board 26 and the fins 31 are the same as in the first embodiment. is there.

  The control device 3 includes an adhesive 33 provided between the fins 31 and the control board 26 and the inner wall of the case 28. The adhesive 33 is made of a silicone material having a higher elastic modulus than that of the silicone gel 29. The fins 31 and the control board 26 are fixed to the inner wall of the case 28 by the adhesive 33. The adhesive 33 is potted with a silicone gel 29 together with the power module 25 and the field module 27.

  As described above, according to the controller-integrated dynamoelectric machine 1B according to the second embodiment of the present invention, with respect to vibrations and shocks in any of the X direction, the Y direction, and the Z direction from the outside, As in the first embodiment, the vibration of the control board 26 is attenuated. Further, according to the control device-integrated dynamoelectric machine 1B, the overall displacement of the control board 26 relative to the case 28 can be reduced. Thereby, the vibration resistance of the controller-integrated dynamoelectric machine 1B can be further improved.

Embodiment 3 FIG.
11 is a plan view showing a control device-integrated dynamoelectric machine according to Embodiment 3 of the present invention, FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. 11, and FIG. 13 is XIII in FIG. It is arrow sectional drawing seen along the -XIII line. In the third embodiment, as in the first and second embodiments, an example is shown in which the controller-integrated rotating electrical machine is mounted on a vehicle and applied to an AC generator motor used for driving assistance and power generation. In the control device-integrated dynamoelectric machine 1C according to the third embodiment of the present invention, the fin 31 has a vertical portion 311 extending from the control board 26 toward the power module 25 in a direction perpendicular to the component mounting surface of the control board 26. And an engaging portion 314 between which the control signal terminal 252 of the power module 25 is sandwiched between the vertical portion 311. The engaging portion 314 is fixed to the control signal terminal 252.

  As in the first embodiment, the fins 31 are formed from an insulating material that is lightweight and excellent in mechanical properties, such as glass epoxy resin and PPS resin. The fins 31 are fixed to the base material portion of the control board 26 using an adhesive and screws, and are also fixed to the control signal terminal 252. As in the first embodiment, the power module 25 and the field module 27 are potted with a silicone gel 29.

  As described above, according to the control device-integrated dynamoelectric machine 1C according to the third embodiment of the present invention, with respect to vibrations and shocks in any of the X direction, the Y direction, and the Z direction from the outside, As in the first embodiment, the vibration of the control board 26 is attenuated. Further, according to the control device-integrated rotating electrical machine 1C, the control signal terminal 252 and the control board 26 of the power module 25 are fixed by the fins 31, so that even if there is vibration and temperature change, the control signal Displacement between the terminal 252 and the control board 26 is less likely to occur, the stress acting on the solder 32 can be reduced, and not only the vibration resistance of the controller-integrated rotating electrical machine 1C but also the controller-integrated rotating electrical machine. The temperature deformation resistance of 1C can also be improved.

  In the present invention, the embodiments can be appropriately combined, modified, or omitted within the scope of the invention.

  1A, 1B, 1C Controller-integrated rotating electrical machine, 2 Rotating electrical machine main body, 3 Controller, 4 Rotating shaft, 5 Rotor, 6 Rotor core, 7 Rotor winding, 8 Front bracket, 9 Rear bracket, 10 Bearing , 11 Bearing, 12 Stator, 13 Stator core, 14 Stator winding, 15 Pulley, 16 Rotation position detector, 17 Slip ring, 18 Brush, 19 Brush holder, 20 Power circuit section, 21 Field circuit section, 22 control circuit part, 23 heat sink, 24 heat radiation fin, 25 power module, 26 control board, 27 field module, 28 case, 29 silicone gel, 30 control device cover, 31 fin, 32 solder, 33 adhesive, 251 power supply wiring 252 Control signal terminal 253 Ground wiring 261 Parts 271 Power wiring 2 72 control signal terminal, 281 power supply wiring, 282 ground wiring, 311 vertical portion, 312 parallel portion, 313 groove, 314 engaging portion.

A controller-integrated rotating electrical machine according to the present invention includes a rotating electrical machine main body, and a control device that is provided in the rotating electrical machine main body and transmits and receives electric power to and from the rotating electrical machine main body, and the control device includes a power module, A control board for controlling the power module, a fin fixed to the control board and including a vertical portion extending in a direction perpendicular to a component mounting surface of the control board, and a case surrounding the power module, the control board and the fin , The gel-like viscoelastic member filled inside the case, and the vertical part attenuates the vibration of the control board in the direction parallel to the component mounting surface by contacting the gel-like viscoelastic member Let

Claims (7)

A rotating electrical machine body;
A control device that is provided in the rotating electrical machine body and transmits and receives power to and from the rotating electrical machine body,
The control device includes a power module, a control board that controls the power module, a fin that is provided on the control board and includes a vertical portion that extends in a direction perpendicular to a component mounting surface of the control board, and the power A controller-integrated dynamoelectric machine having a module, a case surrounding the control board and the fins, and a gel-like viscoelastic member filled inside the case.   The control apparatus-integrated dynamoelectric machine according to claim 1, wherein the vertical portion is provided on both surfaces of the control board.   The control device-integrated rotating electrical machine according to claim 1, wherein the fin is made of resin.   4. The control device-integrated dynamoelectric machine according to claim 1, wherein the fin is fixed to a peripheral portion of the control board. 5. The fin includes a parallel portion parallel to the component mounting surface,
The parallel part is formed integrally with the plurality of vertical parts,
The controller-integrated dynamoelectric machine according to any one of claims 1 to 4, wherein a groove in which a peripheral edge portion of the control board is fitted is formed in the plurality of vertical portions.   The control device according to claim 1, wherein the fin or the control board is fixed to the case using an adhesive having a higher elastic modulus than the gel-like viscoelastic member. Integrated rotating electric machine. The fin is made of an insulating material,
The control device-integrated dynamoelectric machine according to any one of claims 1 to 6, wherein the fin is engaged with a lead portion of the power module.

Images