JP2019129611A - Power supplying device for rotary electric machine and method of manufacturing the same - Google Patents

Abstract

To provide a power supplying device for a rotary electric machine that has a structure capable of discharging a generated gas to the exterior of a smoothing capacitor, and of preventing water from being infiltrated into an inverter circuit and the smoothing capacitor, and to provide a method of manufacturing the same.SOLUTION: A power supplying device 3 for a rotary electric machine comprises: a potting resin 27 that encapsulates an inverter circuit in a container 55; and a housing space formation member 41 that forms a tightly-sealed housing space 40 for housing a smoothing capacitor 29. The housing space formation member 41 is formed with a through-hole 32 that penetrates to communicate between the housing space 40 and the exterior, and an encapsulation member 43 for tightly sealing the through-hole 32 is attached to the through-hole 32.SELECTED DRAWING: Figure 5

Description

  The present disclosure relates to a power supply device for a rotating electrical machine and a method for manufacturing the same.

  As a power supply device for a rotating electrical machine, a rotating electrical machine device in which a rotating electrical machine, a power supply device, and a control device are integrally configured as disclosed in Patent Document 1 is known. In the technique of Patent Document 1, a power circuit that converts DC power and AC power, a smoothing capacitor that absorbs a ripple current generated when a switching element of the power circuit operates, and a field winding of a rotating electrical machine are supplied. And a control circuit for controlling the power circuit and the field circuit. The power circuit, the smoothing capacitor, the field circuit and the control circuit are housed in a space constituted by a heat sink, a case and the like.

International Publication No. 2014/188803

  Depending on the usage environment of the power supply device, durability against humidity and vibration is required. However, Patent Document 1 does not disclose in detail measures against humidity and vibration.

  In order to improve durability against humidity and vibration, it is conceivable to seal each circuit of the power supply device in a container with potting resin. The smoothing capacitor may generate gas from an internal electrolytic substance during use. If the smoothing capacitor is also sealed directly in the potting resin, the generated gas can not be discharged to the outside of the smoothing capacitor, so the internal pressure of the smoothing capacitor increases, which may lead to failure of the smoothing capacitor.

  Therefore, a power supply device for a rotating electrical machine that can discharge the generated gas to the outside of the smoothing capacitor and prevent water from entering the inverter circuit and the smoothing capacitor, and a method for manufacturing the same are desired.

A power supply device for a rotating electrical machine according to this disclosure includes:
An inverter circuit for converting DC power supplied to the power connection terminal and AC power supplied to the rotating electrical machine;
A smoothing capacitor connected to an electric wire connecting the power connection terminal and the inverter circuit;
A container,
Potting resin in which the inverter circuit is sealed in the container;
A housing space forming member that forms a sealed housing space for housing the smoothing capacitor, and
A through hole penetrating the housing space and the outside is formed in the housing space forming member,
A sealing member for sealing the through hole is attached to the through hole.

  According to the power supply device of the rotating electrical machine, the inverter circuit can be sealed in the container with the potting resin, and durability against humidity and vibration can be enhanced. The gas generated inside the smoothing capacitor during use can be discharged into the accommodation space. Since the storage space is sealed, the internal pressure increases due to the discharged gas. However, since the volume of the storage space is larger than the internal volume of the smoothing capacitor, an increase in pressure can be suppressed. Therefore, it can suppress that a smoothing capacitor fails by the increase in pressure. Also, in the manufacturing process, heat may be applied to the device to accelerate the curing of the potting resin and the like. At that time, if the storage space is sealed, the internal pressure in the storage space is increased by heating. Due to the increased internal pressure, uncured resin or the like may be pushed away, and there is a possibility that a vent hole that connects the accommodation space and the outside is formed. Since the through-hole is formed in the housing space forming member, the internal pressure of the housing space can be released from the through-hole when heating in the manufacturing process, and a vent hole is formed in the uncured resin and adhesive. Can be prevented. And if a through-hole is sealed with a sealing member after completion | finish of a heating, it can prevent that a water penetrate | invades into an accommodation space and a smoothing capacitor during use through a through-hole.

A method of manufacturing a power supply device for a rotating electrical machine according to the present disclosure includes: an inverter circuit that converts direct current power supplied to a power supply connection terminal to alternating current power supplied to the rotating electrical machine; A housing space for housing the smoothing capacitor connected to the electric wire to be connected, an uncured potting resin having a heat curing promoting property, and the smoothing capacitor is formed, and a through hole penetrating the housing space and the outside is formed. A member preparing step of preparing a housing space forming member and a sealing member for sealing the through hole;
A capacitor housing step of housing the smoothing capacitor in the housing space formed by the housing space forming member in a state in which the sealing member is not attached to the through hole after the member preparation step;
After the capacitor housing step, a resin filling step of filling the uncured potting resin into a container in a state where the inverter circuit is disposed inside,
After the resin filling step, a heating step of heating and curing the potting resin,
After the heating step, a through-hole sealing step of attaching a sealing member to the through-hole and sealing the accommodation space is performed.

  According to the method for manufacturing a power supply device for a rotating electrical machine, the heating process can shorten the hardening time of the potting resin, and the process can be shifted to the next process at an early stage, thereby improving productivity. Since the sealing member is not attached to the through hole during the heating process, the internal pressure of the accommodation space can be released from the through hole when heated, and a vent hole is formed in the uncured resin or the like. Can be prevented. Since the through hole is sealed by the sealing member by the through hole sealing step, it is possible to prevent water from entering the housing space and the smoothing capacitor through the through hole during use of the power supply device.

1 is a cross-sectional view of a rotating electrical machine apparatus according to Embodiment 1. FIG. 1 is a circuit diagram of a rotating electrical machine apparatus according to Embodiment 1. FIG. It is the figure which looked at the electric power supply apparatus of the state except the potting resin and control apparatus which concern on Embodiment 1 from the opening side. It is the figure which looked at the electric power supply apparatus of the state sealed by the potting resin which concerns on Embodiment 1 from the opening side. 1 is a cross-sectional view of a main part of a power supply device according to a first embodiment. It is the figure which looked at the heat sink concerning Embodiment 1 from the bottom side. It is the elements on larger scale of FIG. 7 is a flowchart illustrating a method of manufacturing the power supply device according to the first embodiment. FIG. 10 is a cross-sectional view of main parts of a power supply device according to a second embodiment. FIG. 10 is a cross-sectional view of main parts of a power supply device according to a third embodiment. FIG. 6 is a cross-sectional view of a main part of a power supply device according to a third embodiment. FIG. 6 is a cross-sectional view of a main part of a power supply device according to a third embodiment. FIG. 6 is a cross-sectional view of a main part of a power supply device according to a fourth embodiment. It is the figure which looked at the heat sink which concerns on Embodiment 4 from the bottom side. 10 is a side view of a sealing member according to Embodiment 4. FIG. FIG. 6 is a cross-sectional view of a main part of a power supply device according to a fourth embodiment. FIG. 10 is a cross-sectional view of a main part of a power supply device according to a fifth embodiment. It is the figure which looked at the insertion hole of the plate-shaped member which concerns on Embodiment 5 from the bottom side.

Embodiment 1
A power supply device 3 of the rotary electric machine 1 according to Embodiment 1 (hereinafter simply referred to as a power supply device 3) will be described with reference to the drawings. In the present embodiment, the rotating electrical machine 1, the power supply device 3, and the control device 20 are integrally configured. FIG. 1 is a cross-sectional view of a rotating electrical machine apparatus. FIG. 2 is a circuit diagram of the rotating electrical machine apparatus.

<Rotating electrical machine 1>
In the present embodiment, the rotating electrical machine apparatus is mounted on a vehicle, and has a function of a generator that generates electric power by a driving force of the internal combustion engine and a function of a motor that assists the driving power of the internal combustion engine. The rotary electric machine 1 is a winding field type synchronous rotary electric machine in which a three-phase winding 11 is provided on a stator 12 and a field winding 6 is provided on a rotor 5.

  The rotary electric machine 1 is housed in a front blanket 7 and a rear blanket 8. The rotating shaft 4 of the rotor 5 is rotatably supported by the front blanket 7 via the front bearing 9 and is rotatably supported by the rear blanket 8 via the rear bearing 10. The stator 12 is fixed to the front blanket 7 and the rear blanket 8.

  The rotary shaft 4 of the rotary electric machine 1 protrudes on one side (hereinafter referred to as the front side) in the axial direction with respect to the front blanket 7, and the pulley 13 is fixed to the front end of the rotary shaft 4 . The pulley 13 is connected to the crankshaft of the internal combustion engine via a belt. The rotating shaft 4 of the rotating electrical machine 1 protrudes from the rear blanket 8 to the other side in the axial direction (hereinafter referred to as the rear side). A rotational position detection sensor 14 is provided on the rotary shaft 4 on the rear side of the rear bearing 10. A positive and negative slip ring 15 connected to the field winding 6 is provided at the rear end of the rotating shaft 4. The brush 17 held by the brush holder 16 is in sliding contact with the slip ring 15. Power is supplied from the power supply 3 to the field winding 6 via the contact surfaces of the slip ring 15 and the brush 17.

<Power supply device 3>
Power supply device 3 and control device 20 are distributed in the circumferential direction in a cylindrical space on the rear side in the axial direction of rotating electric machine 1 (rear blanket 8) and radially outside the rear side protruding portion of rotating shaft 4 Has been placed. The power supply device 3 and the control device 20 are integrally configured, and the rear side and the radially outer side of the power supply device 3 and the control device 20 are covered by a drive device cover 28.

  As shown in FIG. 2, the power supply device 3 includes a power connection terminal 56 connected to the DC power supply 50, a DC power supplied to the power connection terminal 56 and an AC supplied to the three-phase winding 11 of the rotating electrical machine 1. An inverter circuit 39 for converting electric power, and a smoothing capacitor 29 connected to an electric wire connecting the power supply connection terminal 56 and the inverter circuit 39 are provided.

  In the present embodiment, two sets of the three-phase winding 11 and the inverter circuit 39 are provided. The inverter circuit 39 of each group includes a switching element 40a on the positive electrode side connected to the positive electrode terminal (power supply connection terminal 56) of the DC power supply 50 and a negative electrode connected to the negative electrode terminal (ground in this example) of the DC power supply 50. Three sets of series circuits in which the switching elements 40b on the side are connected in series are provided corresponding to the windings of the three phases. The connection point of the two switching elements 40a and 40b in each series circuit is connected to the winding 11 of the corresponding phase. As the switching element, a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), an IGBT (Insulated Gate Bipolar Transistor) in which diodes are connected in reverse parallel, or the like is used.

  The gate terminal of each switching element is connected to the control device 20 (not shown). Therefore, each switching element is turned on or off by the control signal output from the control device 20.

  A series circuit of the switching element 40 a on the positive side and the switching element 40 b on the negative side is a modularized power module 23. A total of six power modules 23 are provided, three for each set of inverter circuits 39. As shown in FIG. 3, the power module 23 is formed in the shape of a rectangular flat chip in which two switching elements 40a and 40b and wires are sealed with resin, as shown in the circuit arrangement, and connection terminals are provided on the sides. It protrudes. The power module 23 includes a positive electrode side connection terminal 23a connected to the positive electrode side wiring 26a, a control signal connection terminal 23b such as a gate terminal of a switching element, and a winding connection terminal connected to the winding via the connection line 26b. A ground connection terminal 23d connected to the negative electrode side wiring 26c is provided. Here, the positive electrode side wire 26 a is connected to the power supply connection terminal 56, and the negative electrode side wire 26 c is connected to the ground.

  The power supply device 3 includes a field winding drive circuit 24 that controls the supply of DC power to the field winding 6. Field winding drive circuit 24 includes three switching elements 24e, 24f, 24g connected in series between the positive electrode terminal (power supply connection terminal 56) of DC power supply 50 and the negative electrode terminal (ground) of DC power supply 50. ing. A connection point between the two switching elements 24e and 24f on the positive electrode terminal side and a connection point between the two switching elements 24f and 24g on the negative electrode terminal side is a field winding 6 via the brush 17 and the slip ring 15, respectively. Are connected to both terminals.

  The field winding drive circuit 24 is a modularized field module 24. As shown in FIG. 3, the field module 24 is formed in the shape of a rectangular flat chip in which three switching elements 24e, 24f, 24g and wiring are sealed with resin, and the connection terminals project laterally. Yes. The field module 24 includes a positive electrode side connection terminal 24 a connected to the positive electrode side wiring 26 a, a control signal connection terminal 24 b such as a gate terminal of a switching element, and two field magnets connected to both ends of the field winding 6. Winding connection terminals 24c1 and 24c2 and a ground connection terminal 24d connected to the negative electrode side wiring 26c are provided.

  The smoothing capacitor 29 absorbs the ripple current generated when the switching element of the inverter circuit 39 operates. The smoothing capacitor 29 is connected between the positive terminal (power connection terminal 56) of the DC power supply 50 and the negative terminal (ground) of the DC power supply 50. In the present embodiment, four smoothing capacitors 29 are provided. For the smoothing capacitor 29, an electrolytic capacitor, a conductive polymer capacitor, a conductive polymer hybrid aluminum electrolytic capacitor or the like is used.

<Control device 20>
The control device 20 controls the rotating electrical machine 1 by turning on and off the switching element of the inverter circuit 39 and the switching element of the field winding drive circuit 24. The control device 20 includes a plurality of processing circuits. For example, the control device 20 includes, as a processing circuit, an arithmetic processing device such as a central processing unit (CPU), a storage device for exchanging data with the arithmetic processing device, an input circuit for inputting an external signal to the arithmetic processing device, and an arithmetic processing device An output circuit for outputting a signal to the outside, a communication circuit for the arithmetic processing unit to communicate with an external device, and the like. The input circuit includes an A / D converter that converts output signals of various types of sensors. The output circuit includes a gate drive circuit that outputs a drive signal to the gate terminal of each switching element.

  Each processing circuit of the control device 20 is mounted on the control board 25. The control board 25 is mounted with an external connector for connecting the communication circuit to an external device. The control substrate 25 is made of glass epoxy resin having good electrical characteristics and mechanical characteristics as a base material.

<Resin sealing of power supply device 3 and control device 20>
A rotating electrical machine apparatus mounted on a vehicle such as in an engine room is required to have durability against humidity and vibration. Each circuit of the power supply device 3 excluding the smoothing capacitor 29 is sealed in a container 55 with a potting resin 27. In the present embodiment, the control device 20 is also sealed in the same container 55 by the potting resin 27. By preventing water from entering the power supply device 3 and the control device 20, the reliability of the power supply device 3 and the control device 20 with respect to humidity is improved. Furthermore, since the periphery of each circuit is fixed with resin, the life against vibration can be improved. The potting resin 27 has heat curing acceleration characteristics. The potting resin 27 is, for example, an epoxy resin. The potting resin 27 may have normal temperature curing characteristics, but curing is accelerated by heating.

  FIG. 4 is a view of a single sealing module viewed from the opening side of the container 55 in a state where the power supply device 3 and the control device 20 are sealed in the container 55 by the potting resin 27. FIG. 5 is a cross-sectional view of the main part cut at the cross-sectional position along the line AA in FIG. 4 and FIG. 3. 3 shows the sealing module in a state in which the potting resin 27 and the control device 20 are removed from the opening side of the container 55 in order to explain the arrangement of each circuit of the power supply device 3 in the container 55. FIG. FIG. 6 is a view of the heat sink 21 near the accommodation space 40 as viewed from the bottom side of the container 55. A control board 25 of the control device 20 is provided on the opening side of each circuit of the power supply device 3 (see FIG. 5), and the control system of the power module 23 and the field module 24 extending to the opening side is connected. Connected to terminal. The opening side of the container 55 coincides with the rear side in the axial direction.

  The container 55 is formed in a bottomed cylindrical shape. In the present embodiment, at the center of the container 55, an opening for disposing the rotation shaft 4 and the brush 17 or the like is provided. The container 55 has a double-walled bottom with a side wall 51 on the outer diameter side, a side wall 52 on the inner diameter side, and an annular bottom wall 53 closing between the side wall 51 on the outer diameter side and the side wall 52 on the inner diameter side. It is formed in a cylindrical shape. A part of the outer side wall 51, the inner side side wall 52, and the bottom wall 53 of the container 55 is constituted by a resin case 30. A part of the outer peripheral side wall 51 and a part of the inner peripheral side wall 52 are connection terminals to which connection terminals of the power system of the power module 23 and the field module 24 are connected.

  The bottom wall 53 of the container 55 is constituted by the case 30, the heat sink 21, and a substrate 44 of a smoothing capacitor to be described later. Specifically, the bottom wall of the case 30 is formed with a plurality of openings for bringing the power module 23 and the field module 24 into contact with the heat sink 21 and for arranging the smoothing capacitor substrate 44. In the opening portion, the heat sink 21 or the substrate 44 of the smoothing capacitor constitutes the bottom wall 53 of the container 55.

  The surface of the heat sink 21 on the opening side of the container 55 is formed in a flat shape, and constitutes the bottom surface of the container 55. The heat sink 21 is formed in an annular shape in accordance with the shape of the bottom wall 53 of the container 55. As shown in part in FIG. 5, the case 30 is bonded to the surface of the heat sink 21 on the opening side of the container 55 by an adhesive 46 having heat curing acceleration characteristics. The heat sink 21 is formed of a metal such as an aluminum alloy having good thermal conductivity. The heat sink 21 is provided with a plurality of flat plate-like heat radiation fins 22 and a plurality of columns 79 on the bottom side opposite to the opening side of the container 55.

  As described above, a part of the bottom wall 53 of the container 55 is constituted by the substrate 44 of the smoothing capacitor. In the present embodiment, a recess that is recessed toward the bottom of the container 55 is formed on the surface of the heat sink 21 on the opening side of the container 55, and the opening of the recess is covered with the substrate 44 of the smoothing capacitor. The opening side of the recess coincides with the opening side of the container 55, and the bottom side of the recess coincides with the bottom side of the container 55.

  The case 30 is fixed to the heat sink 21, and the smoothing capacitor substrate 44 is attached to the recess of the heat sink 21, thereby forming the container 55. Then, after the power supply device 3 and the control device 20 are disposed in the container 55, the potting resin 27 which is not cured is filled.

<Smoothing capacitor storage space>
Incidentally, the smoothing capacitor 29 may generate gas (for example, hydrogen gas) from an internal electrolytic substance during use. Unlike the present embodiment, if the periphery of the smoothing capacitor 29 is sealed directly in the potting resin 27, the generated gas can not be discharged to the outside of the smoothing capacitor 29, so the internal pressure of the smoothing capacitor 29 is There is a possibility that the smoothing capacitor 29 may be damaged due to an increase. Therefore, it is desirable to have a structure that can discharge the generated gas to the outside of the smoothing capacitor 29 and prevent water from entering the smoothing capacitor 29.

  Therefore, in the present embodiment, as shown in the cross-sectional view of FIG. 5, the power supply device 3 includes a housing space forming member 41 that forms a sealed housing space 40 that houses the smoothing capacitor 29. A through hole 32 is formed in the housing space forming member 41 so as to penetrate through the housing space 40 and the outside. A sealing member 43 for sealing the through hole 32 is attached to the through hole 32. A space is provided between the smoothing capacitor 29 and the accommodation space forming member 41.

  According to this configuration, the gas generated inside the smoothing capacitor 29 during use can be discharged from the inside of the smoothing capacitor 29 to the accommodation space 40. Since the storage space 40 is sealed, the internal pressure increases due to the exhausted gas. However, since the volume of the storage space 40 is larger than the internal volume of the smoothing capacitor 29, an increase in pressure can be suppressed. Therefore, it can suppress that the smoothing capacitor 29 breaks down by the increase in pressure. Further, since the housing space 40 is sealed, water can be prevented from entering the housing space 40 and the smoothing capacitor 29.

  Also, in the manufacturing process, heat may be applied to the device to accelerate the curing of the potting resin 27 and the adhesives 31, 46 and the like. At this time, if the housing space 40 is sealed, the internal pressure in the housing space 40 is increased by heating. Due to the increased internal pressure, the uncured resin and the adhesive may be pushed away, and there is a possibility that a vent hole that connects the accommodation space 40 and the outside is formed. According to said structure, since the through-hole 32 is formed in the accommodation space formation member 41, when heating in a manufacturing process, the internal pressure of the accommodation space 40 can be relieved from the through-hole 32, and uncured resin In addition, it is possible to prevent the formation of air holes in the adhesive. When the through hole 32 is sealed with the sealing member 43 after the heating is completed, water can be prevented from entering the accommodation space 40 and the smoothing capacitor 29 through the through hole 32 during use.

  In the present embodiment, in the accommodation space forming member 41, the recess forming member 45 in which the recess is formed in which the smoothing capacitor 29 is disposed, and the opening of the recess are closed. And the substrate 44 of the smoothing capacitor. The through hole 32 is formed in the recess forming member 45. The concave portion whose opening is blocked becomes the accommodation space 40.

  According to this configuration, the accommodation space 40 can be easily formed simply by disposing the smoothing capacitor substrate 44 so that the surface on which the smoothing capacitor 29 is disposed faces the concave portion and closes the opening of the concave portion. The smoothing capacitor 29 can be easily disposed in the accommodation space 40.

  The recess forming member 45 and the substrate 44 of the smoothing capacitor are bonded by an adhesive 31 having a heat curing promoting property. The adhesives 31 and 46 are, for example, epoxy resin or silicone rubber. Although the adhesives 46 and 31 may have a cold curing property, curing is promoted by heating. The area of the smoothing capacitor substrate 44 is larger than the opening area of the recess, and the annular end surface of the recess forming member 45 is opposed to the bottom surface of the smoothing capacitor substrate 44. An adhesive 31 is provided on the opposite portion over the entire circumference.

  According to this configuration, the adhesive 31 can close the gap between the recess forming member 45 and the substrate 44 of the smoothing capacitor, and improve the sealing performance of the accommodation space 40. Further, in the manufacturing process, if the adhesive 31 having the heat curing acceleration property is heated, the curing time can be shortened, and the process can be shifted to the next process at an early stage, thereby improving the productivity. During this heating, the internal pressure of the accommodation space 40 can be released from the through hole 32, and the formation of a vent hole in the uncured adhesive 31 can be prevented. When the through hole 32 is sealed in the sealing member 43 after the heating is completed, waterproofness can be secured.

  If the adhesive 31 for bonding the recess forming member 45 (heat sink 21) and the substrate 44 of the smoothing capacitor is the same adhesive as the adhesive 46 for bonding the case 30 and the heat sink 21, two bondings are performed in the same process. The agents 31, 46 can be applied to the surface of the heat sink 21 and the two adhesives 31, 46 can be heated and cured in the same step.

  The surface on the accommodation space 40 side (bottom side) of the substrate 44 of the smoothing capacitor forms a wall surface of the accommodation space 40 that closes the opening of the recess, and the smoothing capacitor 29 is disposed on the accommodation space 40 side of the substrate 44 of the smoothing capacitor. ing. The surface of the smoothing capacitor on the side (opening side) opposite to the accommodation space 40 side of the substrate 44 of the smoothing capacitor is covered with the potting resin 27.

  According to this configuration, the potting resin 27 can further improve the sealing performance of the connecting portion between the recess forming member 45 and the smoothing capacitor substrate 44. Even when the potting resin 27 having the heat curing promoting property is heated, the internal pressure of the accommodation space 40 can be released from the through hole 32, and the formation of a vent hole can be prevented.

  As described above, the potting resin 27 seals the inverter circuit 39 (in this example, the field winding drive circuit 24 and the control device 20) in the container 55. A part of the container 55 is formed. According to this configuration, the potting resin 27 for sealing each circuit can be effectively used to enhance the sealing property of the housing space 40.

  As described above, the recess forming member 45 is integrally formed with the heat sink 21. According to this configuration, it is not necessary to provide a dedicated member for forming the recess, and it is only necessary to provide the recess in the heat sink 21, so that an increase in cost can be suppressed. In addition, the heat generated by the smoothing capacitor 29 can be transmitted to the heat sink 21 through the smoothing capacitor substrate 44 to be dissipated, and be efficiently dissipated by the heat sink 21 surrounding the periphery of the smoothing capacitor 29. Can do.

  The substrate 44 of the smoothing capacitor comprises a positive electrode wire 47 for connecting the positive electrode side terminal of the smoothing capacitor 29 to the positive electrode terminal, and a negative electrode wire 48 for connecting the negative electrode side terminal of the smoothing capacitor 29 to the negative electrode terminal. And a substrate member 49 that supports the positive electrode wire 47 and the negative electrode wire 48. The positive electrode wire 47 and the negative electrode wire 48 are plate-like copper members. The substrate member 49 is made of resin and seals the positive electrode wire 47 and the negative electrode wire 48. The negative electrode wire 48 is connected to the heat sink 21 connected to the ground by the screw 81. The positive electrode wire 47 is connected to the positive electrode side wire 26 a (not shown). The portion of the heat sink 21 in which the screw 81 is screwed is a columnar support 79, and the strength is increased.

  The smoothing capacitor 29 is an insertion mounting type capacitor having two lead wires 29a and 29b. The smoothing capacitor 29 is disposed on the housing space 40 side of the substrate 44 of the smoothing capacitor, and the two lead wires 29a and 29b are inserted into the two insertion holes 91 and 92 penetrating the substrate 44 of the smoothing capacitor. And connected to the substrate 44 of the smoothing capacitor. The two insertion holes 91 and 92 are closed with the solder 33 in a state where the two lead wires 29a and 29b are inserted. The two insertion holes 91 and 92 are formed in the positive electrode wire 47 and the negative electrode wire 48, respectively. In the present embodiment, four smoothing capacitors 29 are provided, and a total of four sets of two lead wires 29a and 29b and two insertion holes 91 and 92 are provided.

  According to this configuration, even if an insertion mounting type capacitor is used, the two insertion holes 91 and 92 into which the two lead wires 29a and 29b are inserted are closed by the solder 33. Sex is enhanced. When an insertion mounting type capacitor is used, the mounting area of the substrate can be reduced as compared with the case of using a surface mounting type capacitor having a base larger than the outer diameter of the capacitor body. Therefore, a plurality of smoothing capacitors 29 are arranged more densely. And the size of the apparatus can be reduced. Moreover, since the two insertion holes 91 and 92 blocked by the solder 33 are covered with the potting resin 27, the airtightness can be more reliably ensured.

  In the present embodiment, the sealing member 43 is an elastic member such as rubber. According to this configuration, the sealing member 43 can be made in close contact with the through hole 32 to improve the sealing property.

  As a partially enlarged view of FIG. 5 is shown in FIG. 7, the through hole 32 is formed in a stepped cylindrical shape whose radius changes in two steps. The outer step is a large-diameter hole portion 32a, and the step on the accommodation space 40 side is a small-diameter hole portion 32b having a smaller diameter than the large-diameter hole portion 32a. The sealing member 43 is also formed in a stepped cylindrical shape whose radius changes in three steps in accordance with the shape of the through hole 32. The sealing member 43 has a large diameter pillar portion 43a corresponding to the large diameter hole portion 32a of the through hole 32, and a small diameter pillar portion 43b corresponding to the small diameter hole portion 32b of the through hole 32, smaller in diameter than the large diameter pillar portion 43a. And a distal end large-diameter column portion 43c that is disposed closer to the accommodation space 40 than the small-diameter column portion 43b and has a larger diameter than the small-diameter column portion 43b. The sealing member 43 can be reliably fixed to the through hole 32 by sandwiching the small diameter hole portion 32b from both sides by the large diameter column portion 43a and the tip large diameter column portion 43c. The distal end of the distal end large-diameter column portion 43 c on the accommodation space 40 side has a gradually decreasing radius, and the sealing member 43 can be easily inserted into the through hole 32 from the outside of the accommodation space 40.

<Manufacturing method of power supply device>
A method of manufacturing the power supply device 3 will be described with reference to FIG.
First, member preparation process S01 which prepares each member of the electric power supply apparatus 3 is performed. Specifically, an inverter circuit 39, a smoothing capacitor 29, an uncured potting resin 27 having a heat curing promoting property, a housing space forming member 41, and a sealing member 43 are prepared. In addition, uncured adhesive 31, 46 having heat curing promoting properties, the heat sink 21, the case 30, the control device 20, and the substrate 44 of the smoothing capacitor with the smoothing capacitor 29 attached are also prepared.

  After the member preparing step S01, a capacitor housing step S02 for housing the smoothing capacitor 29 in the housing space 40 formed by the housing space forming member 41 in a state where the sealing member 43 is not attached to the through hole 32 is executed. . In the present embodiment, in the capacitor housing step S02, the gaps between the housing space forming members 41 other than the through holes 32 are closed with the uncured adhesive 31, and the adhesive 31 is heated and cured. The housing space forming member 41 includes a recess forming member 45 and a smoothing capacitor substrate 44, and an uncured adhesive 31 is applied to a gap between the recess forming member 45 and the smoothing capacitor substrate 44. During this heating, the housing space forming member 41 is also heated, and the gas in the housing space 40 expands. However, the expanded gas can be discharged from the through hole 32 to the outside of the housing space 40, and is uncured. The formation of vent holes in the agent 31 can be prevented. In the capacitor housing step S02, the heat sink 21, the case 30, and the smoothing capacitor substrate 44 are bonded to assemble the container 55.

  After the capacitor housing step S02, a resin filling step S03 is performed in which the uncured potting resin 27 is filled into the container 55 in a state where the inverter circuit 39 is disposed inside. In the present embodiment, the controller 20 is also disposed inside the container 55, and is filled with the uncured potting resin 27. Through the resin filling step S03, the surface of the smoothing capacitor 44 opposite to the accommodation space 40 side is covered with the uncured potting resin 27.

  After the resin filling step S03, a heating step S04 of heating and curing the potting resin 27 is executed. By this heating step S04, the curing time of the potting resin 27 can be shortened, and the process can be shifted to the next step at an early stage, thereby improving the productivity. During this heating, the accommodation space forming member 41 is also heated, and the gas in the accommodation space 40 expands, but the expanded gas can be discharged from the through hole 32 to the outside of the accommodation space 40, and is uncured resin. In addition, it is possible to prevent the formation of air holes in the adhesive.

  After the heating step S04, a through-hole sealing step S05 for attaching the sealing member 43 to the through-hole 32 and sealing the accommodation space 40 is performed. Water can be prevented from entering the accommodation space 40 and the smoothing capacitor 29 through the through holes 32 during use of the power supply device 3.

Second Embodiment
Next, the power supply device 3 according to Embodiment 2 will be described. Description of the same components as those of the above-described first embodiment will be omitted. FIG. 9 is a cross-sectional view of relevant parts according to the present embodiment, taken along the line AA in FIGS. 4 and 3, similarly to FIG. 5.

  In the present embodiment, the sealing member 43 is an adhesive 43. In the present embodiment, the adhesive 43 is applied so as to cover the opening outside the through hole 32. According to this configuration, there is no need to prepare a dedicated molded part, and the through hole 32 can be sealed simply by applying the adhesive 43 to the through hole 32 and curing it.

Third Embodiment
Next, the power supply device 3 according to Embodiment 3 will be described. The description of the same components as those in the first embodiment is omitted. 10, 11 and 12 are main-portion cross-sectional views according to the present embodiment, which are cut at the cross-sectional position of AA in FIGS. 4 and 3 in the same manner as FIG.

  In the present embodiment, the sealing member 43 is formed with an internal space 95 connected to the storage space 40, and the internal space 95 expands or contracts according to a pressure change in the storage space 40. In the present embodiment, the sealing member 43 has a cylindrical main body 97 fitted to the inner peripheral surface of the through-hole 32 and a bag-like shape that extends outward from the main body 97 and forms an internal space 95. A bag-like portion 98. A vent hole is provided in the center of the main body 97, and the outside of the vent hole is connected to the opening of the bag-like part 98 and is closed by the bag-like part 98. The bag-like portion 98 is provided outside the accommodation space 40. The sealing member 43 is an elastic member such as rubber.

  According to this configuration, the expansion or contraction of the internal space 95 can suppress the pressure change of the accommodation space 40. For example, in the state where the power supply device 3 is at a high temperature, when cold water is applied and the pressure in the storage space 40 decreases, the bag-shaped portion 98 contracts and deforms as shown in FIG. The pressure drop is suppressed. Thereby, it can suppress that water is attracted | sucked by the negative pressure from the fitting part of the sealing member 43 and the through-hole 32, and water permeates into the accommodation space 40. On the other hand, when the pressure in the accommodation space 40 is increased by the gas generated from the smoothing capacitor 29, the bag-like portion 98 is inflated and deformed as shown in FIG. Thereby, it can suppress that the sealing member 43 blows off from the through-hole 32 by falling of the pressure of the accommodation space 40, and drops out.

Fourth Embodiment
Next, the power supply device 3 according to Embodiment 4 will be described. Description of the same components as those of the above-described first embodiment will be omitted. FIG. 13 is a cross-sectional view of relevant parts according to the present embodiment, taken along the line AA in FIGS. 4 and 3, similarly to FIG. FIG. 14 is a view of the heat sink 21 near the accommodation space 40 as seen from the bottom side of the container 55. FIG. 15 is a side view of a screw as the sealing member 43 according to the present embodiment.

  In the present embodiment, a thread is formed in the through hole 32, and the sealing member 43 is a screw that is screwed into the thread. According to this configuration, the sealing member 43 can be firmly attached to the through-hole 32, and the sealing member 43 can be prevented from dropping from the through-hole 32 due to a pressure change in the accommodation space 40. The screw comprises, for example, a screw and a head, as shown in FIG. The screw is screwed into the through hole 32 from the outside of the accommodation space 40.

  The sealing resin 100 is applied between the screw as the sealing member 43 and the thread of the through hole 32. For example, as shown in FIG. 15, after applying the uncured sealing resin 100 to the screw portion, the screw is screwed into the through hole 32. Alternatively, after applying the uncured sealing resin 100 to the thread of the through hole 32, the screw is screwed into the through hole 32. According to this configuration, the sealing resin 100 can further improve the airtightness.

  Further, as shown in FIG. 16, the opening on the accommodation space 40 side of the through hole may be covered by the sheet member 99. According to this configuration, it is possible to prevent chips generated when screws are screwed together from being blocked by the sheet member 99 and entering the accommodation space 40. A conductive aluminum alloy chip or the like can prevent a short circuit in the connection of the smoothing capacitor 29.

  Before covering the opening of the recess forming member 45 (heat sink 21) with the substrate 44 of the smoothing capacitor, the sheet member 99 is attached to the opening on the side of the accommodation space 40 of the through hole with an adhesive. The sheet member 99 has a minute gap so that the gas expanded or contracted in the heating process can pass therethrough, and does not have airtightness.

Embodiment 5
Next, the power supply device 3 according to Embodiment 5 will be described. The description of the same components as those in the first embodiment is omitted. FIG. 17 is a cross-sectional view of the main part according to the present embodiment, taken along the line AA in FIGS. 4 and 3, similarly to FIG. FIG. 18 is an enlarged view of a main part when the insertion hole 75a of the plate-like member 75 is viewed from the bottom side.

  Similar to the fourth embodiment, a thread is formed in the through-hole 32, and the sealing member 43 is a screw screwed into the thread. In the present embodiment, the screw as the sealing member 43 is screwed into the screw thread through the insertion hole 75 a provided in the plate-like member 75. According to this configuration, fixing of the plate-like member 75 and sealing of the through hole 32 can be performed simultaneously, and the number of parts can be reduced. The plate-like member 75 is a metal plate-like member. The plate member 75 is formed in an annular shape in accordance with the shape of the heat sink 21. The plate-like member 75 is in contact with the heat dissipating fins 22 of the heat sink 21, the support column 79, and the bottom surface of the recess forming member 45. The plate-like member 75 can increase the heat radiation area and improve the heat radiation of the heat sink 21.

  As shown in FIG. 18, the insertion hole 75a of the plate-like member 75 has a notch portion 75b having an enlarged diameter at one or a plurality of locations (four locations in this example) in the circumferential direction. In FIG. 18, a screw as the sealing member 43 is indicated by a broken line. When the sealing resin 100 is applied between the screw serving as the sealing member 43 and the through hole 32, the screw applied with the sealing resin 100 is screwed into the thread of the through hole 32 from the bottom side. Sometimes, the excess sealing resin 100 comes out to the bottom side of the through hole 32. The discharged sealing resin 100 is accumulated in the notch portion 75b of the insertion hole 75a, and the bottom side of the insertion hole 75a is covered by the head of the screw, whereby the discharged sealing resin 100 is inserted into the insertion hole 75a. Can be prevented from being scattered outside.

[Other Embodiments]
Finally, other embodiments of the present disclosure will be described. The configuration of each embodiment described below is not limited to one applied individually, and may be applied in combination with the configuration of the other embodiments as long as no contradiction arises.

(1) In each of the above embodiments, the case where the rotating electrical machine 1, the power supply device 3, and the control device 20 are integrally configured has been described as an example. However, embodiments of the present disclosure are not limited to this. That is, the rotary electric machine 1, the power supply device 3, and the control device 20 may be separately configured in any combination. For example, the power supply device 3 and the control device 20 may be configured integrally, and the rotating electrical machine 1 may be configured separately, and the rotating electrical machine 1, the power supply device 3, and the control device 20 are configured separately. May be.

(2) In each of the above embodiments, the case where the control device 20 is sealed in the container 55 with the potting resin 27 together with each circuit of the power supply device 3 excluding the smoothing capacitor 29 has been described as an example. . However, embodiments of the present disclosure are not limited to this. That is, the control device 20 may not be sealed with the potting resin 27 in the container 55, and may be configured separately from the power supply device 3.

(3) In each of the above embodiments, the accommodation space forming member 41 is configured by the recess forming member 45 and the smoothing capacitor substrate 44, and the through hole 32 is formed in the recess forming member 45. It has been described as an example. However, the housing space forming member 41 may be a member having any shape and material as long as it forms a sealed housing space 40 that houses the smoothing capacitor 29. For example, the concave portion forming member 45 may be a bottomed cylindrical case member made of resin, or may be a plate member made of resin instead of the substrate 44 of the smoothing capacitor.

(4) In each of the above embodiments, the rotating electrical machine 1 is a winding field type synchronous rotating electrical machine, and the power supply device 3 includes the field winding drive circuit 24 as an example. explained. However, the rotating electrical machine 1 is a permanent magnet type synchronous rotating electrical machine in which a permanent magnet is provided on the rotor, and the power supply device 3 may not include the field winding drive circuit 24.

(5) In each of the above embodiments, the case where a part of the accommodation space forming member 41 is covered with the potting resin 27 has been described as an example. However, the housing space forming member 41 may not be covered by the potting resin 27.

(6) In the above embodiments, examples of the plurality of sealing members 43 have been described. However, the sealing member 43 may be a member having any shape and material as long as it is a member that is attached to the through hole 32 and seals the through hole 32.

(7) In each above-mentioned embodiment, the case where four smoothing capacitors 29 were provided was explained as an example. However, any number of smoothing capacitors 29 may be provided.

  Within the scope of the disclosure, the present disclosure can be freely combined with each other, or can be appropriately modified or omitted.

DESCRIPTION OF SYMBOLS 1 rotary electric machine, 3 electric power supply apparatus, 21 heat sink, 20 control apparatus, 27 potting resin, 29 smoothing capacitor, 29a, 29b lead wire, 31 adhesive agent, 32 through holes, 39 inverter circuit, 40 accommodation space, 41 accommodation space formation Member, 43 sealing member, 44 smoothing capacitor substrate, 45 recess forming member, 55 container, 56 power connection terminal, 75 plate member, 75a plate member insertion hole, 75b notch, 91, 92 insertion hole, 95 internal space, 99 sheet member, S01 member preparation process, S02 capacitor accommodation process, S03 resin filling process, S04 heating process, S05 through hole sealing process

A power supply device for a rotating electrical machine according to this disclosure includes:
An inverter circuit for converting DC power supplied to the power connection terminal and AC power supplied to the rotating electrical machine;
A smoothing capacitor connected to an electric wire connecting the power connection terminal and the inverter circuit;
A container,
Potting resin in which the inverter circuit is sealed in the container;
A housing space forming member that forms a sealed housing space for housing the smoothing capacitor, and
The accommodation space forming member is formed with a through hole penetrating the accommodation space and the outside,
A sealing member for sealing the through hole is attached to the through hole ,
The housing space forming member includes a recess forming member in which a recess is formed in which the smoothing capacitor is disposed, and a substrate which closes the opening of the recess and in which the smoothing capacitor is disposed and connected on the recess side. Composed of
The through hole is formed in the recess forming member.

Claims (18)

An inverter circuit for converting DC power supplied to the power connection terminal and AC power supplied to the rotating electrical machine;
A smoothing capacitor connected to an electric wire connecting the power connection terminal and the inverter circuit;
A container,
Potting resin in which the inverter circuit is sealed in the container;
A housing space forming member that forms a sealed housing space for housing the smoothing capacitor, and
The accommodation space forming member is formed with a through hole penetrating the accommodation space and the outside,
The electric power supply apparatus of the rotary electric machine by which the sealing member which seals the said through-hole is attached to the said through-hole. The housing space forming member includes a recess forming member in which a recess is formed in which the smoothing capacitor is disposed, and a substrate which closes the opening of the recess and in which the smoothing capacitor is disposed and connected on the recess side. Composed of
The power supply device for a rotating electrical machine according to claim 1, wherein the through hole is formed in the recess forming member.   The power supply device for a rotating electrical machine according to claim 2, wherein the recess forming member and the substrate are bonded to each other with an adhesive having heat curing acceleration characteristics. The surface on the accommodation space side of the substrate forms a wall surface of the accommodation space that closes the opening of the recess, and the smoothing capacitor is disposed on the accommodation space side of the substrate.
The power supply device for a rotating electrical machine according to claim 2 or 3, wherein the surface of the substrate opposite to the accommodation space side is covered with potting resin.   The power supply device for a rotating electrical machine according to claim 4, wherein the substrate constitutes a part of the container. A heat sink is further provided,
The power supply device for a rotating electrical machine according to any one of claims 2 to 5, wherein the recess forming member is integrally formed with the heat sink. The smoothing capacitor is an insertion mounting type capacitor having two lead wires, and two insertion holes through which the two lead wires penetrate the substrate in a state of being disposed on the accommodation space side of the substrate Connected to the substrate,
The power supply device for a rotating electrical machine according to any one of claims 2 to 6, wherein the two insertion holes are closed with solder in a state where the two lead wires are inserted.   The power supply device for a rotating electrical machine according to any one of claims 1 to 7, wherein the potting resin has a heat curing promoting property.   The power supply device for a rotating electrical machine according to any one of claims 1 to 8, wherein the sealing member is an elastic member.   10. The power supply device for a rotating electrical machine according to claim 9, wherein an inner space connected to the accommodation space is formed in the sealing member, and the inner space expands or contracts according to a change in pressure of the accommodation space.   The power supply device for a rotating electrical machine according to claim 1, wherein the sealing member is an adhesive.   2. The power supply device for a rotating electrical machine according to claim 1, wherein a screw thread is formed in the through hole, and the sealing member is a screw screwed into the screw thread.   The power supply device for a rotating electrical machine according to claim 12, wherein a sealing resin is applied between the screw and the screw thread.   The power supply device for a rotating electrical machine according to claim 12 or 13, wherein the screw is screwed into the screw thread through an insertion hole provided in a plate-like member.   The electric power supply apparatus for a rotating electrical machine according to claim 14, wherein the insertion hole provided in the plate-like member has a notch portion having an enlarged diameter at one or a plurality of locations in the circumferential direction.   The power supply device of the rotary electric machine according to any one of claims 12 to 15, wherein an opening on the accommodation space side of the through hole is covered with a sheet member. An inverter circuit for converting direct current power supplied to a power supply connection terminal to alternating current power supplied to a rotating electrical machine, a smoothing capacitor connected to an electric wire connecting the power supply connection terminal and the inverter circuit, and heat and curing promoting characteristics An accommodation space forming member for forming an accommodation space for accommodating the uncured potting resin having the above, and the smoothing capacitor, in which a through hole penetrating the accommodation space and the outside is formed, and for sealing the through hole A member preparing step for preparing a sealing member;
A capacitor housing step of housing the smoothing capacitor in the housing space formed by the housing space forming member in a state in which the sealing member is not attached to the through hole after the member preparation step;
After the capacitor housing step, a resin filling step of filling the uncured potting resin into a container in a state where the inverter circuit is disposed inside,
A heating step of heating and curing the potting resin after the resin filling step;
The manufacturing method of the electric power supply apparatus of the rotary electric machine which attaches a sealing member to the said through-hole after the said heating process, and performs the through-hole sealing process of sealing the said accommodation space. In the member preparation step, an uncured adhesive having heat curing promoting properties is further prepared,
The manufacturing method of the power supply device according to claim 17, wherein in the capacitor housing step, the gaps between the housing space forming members other than the through holes are closed with the uncured adhesive, and the adhesive is heated and cured. Method.

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