JP2017085692A - Inverter-integrated rotating electrical machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an inverter-integrated rotating electric machine that can be miniaturized.SOLUTION: An inverter-integrated rotating electric machine has a rotating electrical machine body 1 having a rotating shaft 105, a rotor 106 provided on the rotating shaft 105, and a stator 107 provided radially outside the rotor 106, an electronic module for exchanging electric current with the rotating electric machine body 1, a heat sink 203 to which an electronic module is attached and through which heat is transferred to and from the electronic module, and a heat sink cover 206 provided so that the heat sink 203 is disposed between the heat sink cover 206 and the electronic module and in which a coolant passage 208 is formed between the heat sink cover 206 and the heat sink 203. The coolant passage 208 is disposed radially outward of the rotation shaft 105.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inverter-integrated rotating electrical machine in which a rotating electrical machine main body and an inverter device are integrally provided.

  Conventionally, a motor having a rotating shaft, a rotor provided on the rotating shaft, a stator provided on the radially outer side of the rotor, a motor case in which the rotating shaft, the rotor and the stator are accommodated, and the rotor Inverter integrated type comprising: an inverter for transferring current between each of the rotor winding and the stator winding of the stator; and an inverter device having an inverter case in which the inverter is housed and a refrigerant passage is formed A motor device is known (see, for example, Patent Document 1).

JP 2006-197781 A

  However, since the refrigerant passage is arranged away from the rotating shaft in the axial direction, there is a problem that the dimensions of the inverter-integrated rotating electrical machine in the axial direction of the rotating shaft are increased.

  The present invention provides an inverter-integrated rotating electrical machine that can be miniaturized.

  An inverter-integrated rotating electrical machine according to the present invention includes a rotating electrical machine body having a rotating shaft, a rotor provided on the rotating shaft, and a stator provided on a radially outer side of the rotor, and a current between the rotating electrical machine body. Between the electronic module, the heat sink between which the electronic module is attached and the electronic module is mounted and heat transfer is performed between the electronic module and the electronic module. And a heat sink cover in which a refrigerant passage is formed, and the refrigerant passage is disposed radially outside the rotation shaft.

  According to the inverter-integrated rotating electrical machine according to the present invention, since the refrigerant passage is disposed on the radially outer side of the rotating shaft, the dimensions of the inverter-integrated rotating electrical machine in the axial direction of the rotating shaft can be reduced. . Thereby, size reduction of an inverter integrated rotating electrical machine can be achieved.

It is sectional drawing which shows the inverter integrated rotary electric machine which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the principal part of the inverter integrated rotary electric machine of FIG. It is a side view which shows the inverter assembly of FIG. It is a side view which shows the inverter assembly of FIG. It is a side view which shows the inverter assembly in the inverter integrated rotary electric machine which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the inverter integrated rotary electric machine which concerns on Embodiment 3 of this invention. It is a side view which shows the rear bracket of FIG.

Embodiment 1 FIG.
1 is a cross-sectional view showing an inverter-integrated dynamoelectric machine according to Embodiment 1 of the present invention. The inverter-integrated rotating electrical machine includes a rotating electrical machine main body 1 and an inverter assembly 2 that exchanges current with the rotating electrical machine main body 1.

  The rotating electrical machine body 1 includes a front bracket 101, a rear bracket 102 fixed to the front bracket 101, a bearing 103 attached to the front bracket 101, a bearing 104 attached to the rear bracket 102, a bearing 103, and A rotary shaft 105 provided over the bearing 104, a rotor 106 provided on the rotary shaft 105, and a stator 107 provided on the radially outer side of the rotor 106 and fixed to the front bracket 101 and the rear bracket 102. And a magnetic pole position sensor 108 for detecting the magnetic pole position of the rotor 106. The front bracket 101 and the rear bracket 102 constitute a bracket portion.

  The rotating electrical machine body 1 includes a plurality of fans 109 provided on the rotor 106, a pulley 110 provided on one end of the rotor 106, and a slip ring 111 provided on the other end of the rotor 106. The brush 112 that contacts the slip ring 111 and the brush holder 113 in which the brush 112 is housed are provided.

  The rotating shaft 105 is rotatably supported by the front bracket 101 and the rear bracket 102 via the bearing 103 and the bearing 104. The rotating shaft 105 passes through the front bracket 101 and the rear bracket 102. One end of the rotation shaft 105 protrudes from the front bracket 101 to the outside of the front bracket 101. The other end of the rotation shaft 105 protrudes from the rear bracket 102 to the outside of the rear bracket 102.

  The rotor 106 is accommodated inside the front bracket 101 and the rear bracket 102. The rotor 106 rotates with the rotating shaft 105. The rotor 106 includes a rotor core 114 and a rotor winding 115 attached to the rotor core 114. In this example, the rotor winding 115 is a field winding.

  The stator 107 is accommodated inside the front bracket 101 and the rear bracket 102. The stator 107 is disposed so as to face the rotor 106 in the radial direction. The stator 107 has a stator core 116 and a stator winding 117 provided on the stator core 116. In this example, the stator winding 117 is an armature winding and is a three-phase winding.

  The magnetic pole position sensor 108 is disposed outside the front bracket 101 and the rear bracket 102. The magnetic pole position sensor 108 is disposed between the bearing 104 and the slip ring 111. The magnetic pole position sensor 108 includes a sensor rotor 118 fixed to the rotating shaft 105 and a sensor stator 119 provided on the radially outer side of the sensor rotor 118 and fixed to the rear bracket 102. The sensor stator 119 is disposed so as to face the sensor rotor 118 in the radial direction. The sensor rotor 118 is composed only of an iron core. As the rotating shaft 105 rotates, the rotor 106 and the sensor rotor 118 rotate. The sensor stator 119 detects the magnetic pole position of the rotor 106 using information on the position of the sensor rotor 118 in the rotation direction.

  The fan 109 is a radially outer portion of the rotor 106 and is attached to an axially outer portion of the rotor 106. As the rotor 106 rotates, the fan 109 rotates and cooling air is generated.

  The pulley 110 is disposed outside the front bracket 101 and the rear bracket 102. In this example, the pulley 110 is disposed such that the front bracket 101 is disposed between the rear bracket 102 and the pulley 110 in the axial direction of the rotation shaft 105. The pulley 110 is provided with a belt (not shown). The pulley 110 transmits and receives torque to and from the internal combustion engine via a belt.

  The slip ring 111 is disposed outside the front bracket 101 and the rear bracket 102. In this example, the slip ring 111 is disposed such that a rear bracket is disposed between the front bracket 101 and the slip ring 111 in the axial direction of the rotation shaft 105. A field current supplied to the rotor winding 115 flows through the slip ring 111.

  The inverter assembly 2 includes a plurality of power modules 201 that exchange current with the stator winding 117, one field module 202 that exchanges current with the rotor winding 115, The module 201 and the field module 202 are attached so as to be in surface contact with each other, heat sinks 203 to which heat is transmitted from the power module 201 and the field module 202, and terminals of the power systems of the power module 201 and the field module 202 A case 204 having a terminal to be connected and a control module 205 for controlling the power module 201 and the field module 202 are provided.

  The inverter assembly 2 has a heat sink cover 206 attached to the heat sink 203 and a protective cover 207 attached to the heat sink 203. Between the heat sink 203 and the heat sink cover 206, a refrigerant passage 208 through which the refrigerant passes is formed. A magnetic pole position sensor 108 is disposed between the refrigerant passage 208 and the rotary shaft 105 in the radial direction.

  The power module 201 supplies an armature current to the stator winding 117 when the rotating electrical machine body 1 is driven, and rectifies the armature current supplied from the stator winding 117 when the rotating electrical machine body 1 generates power. The switching element for this purpose and the peripheral circuit of this switching element are collected. The field module 202 is a collection of switching elements for controlling the field current supplied to the rotor winding 115 and peripheral circuits of the switching elements. In this example, each of the power module 201 and the field module 202 constitutes an electronic module. The power module 201 and the field module 202 have a structure in which a switching element or the like is mounted on a lead frame for wiring and the whole is resin-molded. The control module 205 includes a control circuit for controlling the power module 201 and the field module 202. A signal wiring of the sensor stator 119 is connected to the control module 205.

  FIG. 2 is a cross-sectional view showing a main part of the inverter-integrated dynamoelectric machine of FIG. The inverter assembly 2 further includes a connecting board 209 attached to the rear bracket 102. The connecting board 209 is insert-molded with a terminal 210 for electrically connecting the stator lead wire 120 of the stator 107 and the power module 201. The connecting board 209 is fixed to the rear bracket 102 using screws (not shown).

  Stator lead wire 120 penetrates rear bracket 102. The stator lead wire 120 is joined to a terminal 210 insert-molded on the connecting board 209 by welding or the like.

  In the case 204, the terminal 211 of the connecting board 209 and the terminal 211 fixed by using screws are insert-molded. The terminal 211 is electrically connected to the terminal 210 by being fixed to the terminal 210 using a screw.

  The terminal 211 insert-molded in the case 204 and the power system terminal 212 of the power module 201 are joined by welding or the like.

  3 is a side view showing the inverter assembly 2 of FIG. 1, and FIG. 4 is a side view showing the inverter assembly 2 of FIG. 3 shows a view of the inverter assembly 2 of FIG. 1 viewed from the left, and FIG. 4 shows a view of the inverter assembly 2 of FIG. 1 viewed from the right. Six power modules 201 and one field module 202 are attached to the heat sink 203 in surface contact. Further, the inverter assembly 2 has three smoothing capacitors 213.

  The heat sink cover 206 is disposed so that at least a part of each of the power module 201, the field module 202, the smoothing capacitor 213, and the refrigerant passage 208 overlap when viewed in the axial direction.

  The negative terminal 214 of each power module 201 is fixed to the heat sink 203 with screws. The negative terminal 214 of each power module 201 is electrically connected to the heat sink 203. Therefore, the heat sink 203 constitutes a part of the earth circuit. Smoothing capacitor 213 is electrically connected between B / GND in each power module 201 and field module 202.

  The inverter assembly 2 includes a nipple 215 that is attached to the heat sink cover 206 and allows refrigerant to enter the refrigerant passage 208, and a nipple 216 that is attached to the heat sink cover 206 and that discharges refrigerant from the refrigerant passage 208. Have.

  Next, a method for assembling the inverter-integrated rotating electrical machine will be described. The rotating electrical machine main body 1 is assembled except for the brush 112 and the brush holder 113, and the inverter assembly 2 is assembled except for the protective cover 207.

  Thereafter, the brush 112 and the brush holder 113 are assembled to the inverter assembly 2, and finally, the protective cover 207 is attached to the inverter assembly 2. This completes the assembly of the inverter-integrated rotating electrical machine.

  As described above, according to the inverter-integrated electric rotating machine according to Embodiment 1 of the present invention, the rotating shaft 105, the rotor 106 provided on the rotating shaft 105, and the radially outer side of the rotor 106 are provided. A rotating electrical machine main body 1 having a stator 107, an electronic module that transmits and receives current between the rotating electrical machine main body 1, a heat sink 203 to which the electronic module is attached and heat is transmitted to and from the electronic module; A heat sink 203 is provided so as to be disposed between the electronic module and the heat sink 203. A refrigerant passage 208 is formed between the heat sink 203 and the refrigerant passage 208. Since it is arranged on the outside, the size of the inverter-integrated rotating electrical machine in the axial direction of the rotating shaft 105 can be reduced.Thereby, size reduction of an inverter integrated rotating electrical machine can be achieved.

  Further, since the refrigerant passage 208 is arranged so that at least a part of the electronic module overlaps the refrigerant passage 208 when viewed in the axial direction of the rotating shaft 105, the cooling performance of the electronic module can be improved. it can. In addition, since the heat source is intensively cooled, it is possible to reduce the size of the inverter-integrated rotating electrical machine.

  In addition, since the heat sink 203 constitutes a part of the ground circuit, the use of the bus bar for grounding can be eliminated. Thereby, the number of parts of the inverter-integrated rotating electrical machine can be reduced, and the manufacturing cost can be reduced.

Embodiment 2. FIG.
5 is a side view showing an inverter assembly in an inverter-integrated dynamoelectric machine according to Embodiment 2 of the present invention. Each of the plurality of smoothing capacitors 213 is disposed adjacent to the refrigerant passage 208 in the circumferential direction. Other configurations are the same as those in the first embodiment.

  As described above, the inverter-integrated dynamoelectric machine according to Embodiment 2 of the present invention further includes the smoothing capacitor 213 that is electrically connected to the electronic module. Since they are adjacent in the circumferential direction, dead space in the inverter assembly 2 can be reduced. Thereby, further miniaturization of the inverter-integrated rotating electrical machine can be achieved.

Embodiment 3 FIG.
6 is a sectional view showing an inverter-integrated dynamoelectric machine according to Embodiment 3 of the present invention, and FIG. 7 is a side view showing a rear bracket 102 of FIG. FIG. 7 shows the rear bracket 102 of FIG. 6 as viewed from the left. The heat sink cover 206 is formed integrally with the rear bracket 102. That is, the heat sink cover 206 is constituted by a part of the rear bracket 102. Other configurations are the same as those in the first embodiment. Note that, as described in the second embodiment, the smoothing capacitor 213 may be disposed adjacent to the refrigerant passage 208 in the circumferential direction.

  As described above, according to the inverter-integrated dynamoelectric machine according to Embodiment 3 of the present invention, the heat sink cover 206 is composed of a part of the rear bracket 102 in which the stator 107 is provided. The number of parts of the inverter-integrated rotating electrical machine can be reduced, the manufacturing cost can be reduced, and the inverter-integrated rotating electrical machine can be reduced in size.

  1 rotating electrical machine body, 2 inverter assembly, 101 front bracket, 102 rear bracket, 103 bearing, 104 bearing, 105 rotating shaft, 106 rotor, 107 stator, 108 magnetic pole position sensor, 109 fan, 110 pulley, 111 slip ring, 112 Brush, 113 Brush holder, 114 Rotor core, 115 Rotor winding, 116 Stator core, 117 Stator winding, 118 Sensor rotor, 119 Sensor stator, 120 Stator lead wire, 201 Power module, 202 Field Module, 203 Heat sink, 204 Case, 205 Control module, 206 Heat sink cover, 207 Protective cover, 208 Refrigerant passage, 209 Connecting board, 210 terminal, 211 terminal, 212 end , 213 smoothing capacitor, 214 minus terminal, 215 nipple, 216 nipple.

An inverter-integrated rotating electrical machine according to the present invention includes a rotating electrical machine body having a rotating shaft, a rotor provided on the rotating shaft, and a stator provided on a radially outer side of the rotor, and a current between the rotating electrical machine body. Between the electronic module, the heat sink between which the electronic module is attached and the electronic module is mounted and heat transfer is performed between the electronic module and the electronic module. And a heat sink cover in which a refrigerant passage is formed. The refrigerant passage is disposed radially outside the rotation shaft, and the magnetic pole position of the rotor is disposed between the refrigerant passage and the rotation shaft in the radial direction of the rotation shaft. A magnetic pole position sensor for detecting is disposed .

Claims (5)

A rotating electrical machine main body having a rotating shaft, a rotor provided on the rotating shaft, and a stator provided on a radially outer side of the rotor;
An electronic module that exchanges current with the rotating electrical machine body;
A heat sink to which the electronic module is attached and heat is transferred to and from the electronic module;
A heat sink cover provided so that the heat sink is disposed between the electronic module and a refrigerant passage formed between the heat sink and the heat sink;
The refrigerant passage is an inverter-integrated dynamoelectric machine that is disposed on a radially outer side of the rotating shaft.   2. The inverter-integrated dynamoelectric machine according to claim 1, wherein the refrigerant passage is disposed so that at least a part of the electronic module overlaps the refrigerant passage when viewed in an axial direction of the rotation shaft. A smoothing capacitor electrically connected to the electronic module;
The inverter-integrated rotating electrical machine according to claim 1, wherein the smoothing capacitor is adjacent to the refrigerant passage in the circumferential direction.   4. The inverter-integrated rotating electrical machine according to claim 1, wherein the heat sink cover is configured by a part of a bracket portion in which the stator is provided. 5.   The inverter-integrated dynamoelectric machine according to any one of claims 1 to 4, wherein the heat sink constitutes a part of a ground circuit.

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