JP6342022B1 - Controller-integrated rotating electrical machine - Google Patents

Abstract

A space factor of a plurality of power modules is improved, cooling efficiency is improved, and the size is reduced. A plurality of power modules 9 are arranged in an annular shape in the circumferential direction, and each of the plurality of power modules has a trapezoidal shape with an unequal leg when viewed in the axial direction. The lower base 9LB is located radially inward and radially outward, and the slope of one leg 9LP1 and the slope of the other leg 9LP2 of each power module are different from each other. One leg and the other leg are opposed to each other via a gap 9g9 extending in the radial direction, and the heat sink 31 includes a plurality of fins 31a that extend radially and are arranged radially. A structure that is provided on the power module side facing a plurality of power modules. [Selection] Figure 4

Description

  The present invention comprises a first assembly of a motor having a stator and a rotor, and a second assembly of a control device for controlling the motor, wherein the first assembly and the second assembly are integrated. The present invention relates to a control device-integrated rotating electrical machine assembled coaxially, and more particularly to a power module included in a second assembly for controlling energization of a motor and a heat sink structure for cooling the power module.

  In this type of conventional controller-integrated rotating electrical machine, for example, an inverter in which rectangular power modules are arranged in a rectangular wave shape and heat sink cooling fins under the power module are arranged in a rectangular wave shape is exemplified. (See Patent Document 1)

Japanese Patent No. 5373936

  A conventional control device-integrated rotating electrical machine, for example, the case disclosed in Patent Document 1, has the following technical problems. In other words, the rectangular power module is arranged in a rectangular wave shape, and the heat sink cooling fins under the power module are arranged in a rectangular wave shape, so the cooling air path is not directed to the center and the outside air introduction efficiency is poor. Was bad. Further, since the rectangular power modules are arranged in a rectangular wave shape, a dead space is created.

  The present invention has been made to solve such a technical problem in the related art, and aims to improve the space factor of a plurality of power modules, improve the cooling efficiency, and reduce the size. To do.

A controller-integrated rotating electrical machine according to the present invention includes a first assembly of a motor having a stator and a rotor, and a second assembly of a control device that controls the motor, and the first assembly and the A controller-integrated rotating electrical machine in which the second assembly is integrally and coaxially assembled;
The control device includes a plurality of power modules that supply power to the motor, and a heat sink that cools the plurality of power modules,
The plurality of power modules are arranged in an annular shape in the circumferential direction,
Each of the plurality of power modules is a trapezoid with a non-regular shape when viewed in the axial direction,
The upper base of each power module of the trapezoidal unequal leg is located on the radially inner side and the lower base is located on the radially outer side, respectively.
The inclination of one leg of each power module of the trapezoid of the non-equal leg is different from the inclination of the other leg,
The circumferential direction of each power module of the non-equal leg trapezoid is the same,
The one leg and the other leg of the adjacent power modules are opposed to each other through a gap extending in the radial direction,
The gap has the same distance from the radially inner end to the radially outer end,
The heat sink is provided with a plurality of fins radially extending in the radial direction and facing the plurality of power modules on the side of the plurality of power modules.

In the controller-integrated rotating electrical machine according to the present invention, the plurality of power modules are arranged in an annular shape in the circumferential direction, and each of the plurality of power modules has a trapezoidal shape in which the shape seen in the axial direction is an unequal leg, The upper base of each power module of the trapezoid is located radially inward and the lower base is located radially outward. The slope of one leg of each power module of the non-equal trapezoid and the slope of the other leg Inclination is different, the circumferential direction of each power module of the trapezoid of the non-equal legs is the same, and one leg and the other leg of adjacent power modules extend in the radial direction Since the gaps are opposed to each other through the gap, and the gap between the radial inner end and the radial outer end is the same, the space factor of the plurality of power modules is improved, and the heat sink Each extending radially A plurality of fins arranged radially, so is provided opposite to the plurality of power modules on the side of the plurality of power modules, the effect of cooling efficiency is improved.

It is a figure which shows Embodiment 1 of this invention, and is a vertical side view of a rotary electric machine. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Embodiment 1 of this invention, and is the front view which looked at the inverter assembly (2nd assembly) from the front side (rear side) in the state which removed the protective cover. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Embodiment 1 of this invention, and is the front view which looked at the heat sink from the fin side (rear side). In the figure which shows Embodiment 1 of this invention, the structure of the vicinity of the B line terminal (power terminal) and GND line terminal (power terminal) of an inverter assembly (2nd assembly) was seen from the front side (rear side). It is a front view. It is a figure which shows Embodiment 2 of this invention, and is the front view which looked at the inverter assembly (2nd assembly) from the front side (rear side) in the state which removed the protective cover.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. 1 is a longitudinal side view of a rotating electrical machine, FIG. 2 is a front view of the inverter assembly (second assembly) viewed from the front side (rear side) with the protective cover removed, and the figure shows the heat sink on the fin side. FIG. 4 is a front view of the inverter assembly (second assembly) viewed from the front side (rear side) and the structure near the B line terminal (power terminal) and GND line terminal (power terminal) of the inverter assembly (second assembly). FIG.

In FIG. 1, a rotating electrical machine 1 includes a rotor 2 around which a field winding 2 a is wound, a stator 3 around which a three-phase stator winding 3 a is wound, a rotor 2, and a front bracket 4 that houses the stator 3. And the rear bracket 5, the magnetic pole position detection sensor 6 for detecting the rotation state of the rotor 2, the power module 9 and the field module 10 which are electronic modules for supplying power, and the electronic module (the power module 9 and the field module 10). ) And a capacitor 20 that absorbs a switching surge of a controllable semiconductor switching element (not shown) included in the power module 9 and the field module 10.
The rotating electrical machine 1 includes a first assembly 40 that constitutes a motor body as a large component, a plurality of power modules that supply power to the motor, and a control device that includes a heat sink that cools the plurality of power modules. And two assemblies 30.

First, the first assembly 40 will be described.
The rotor 2 includes a rotating shaft 11 whose both ends are rotatably supported by a front bracket 4 and a rear bracket 5 via bearings 7 and 8, respectively. One end portion of the rotating shaft 11 protrudes from the front bracket 4 to the front side, and a pulley 12 is attached to a tip portion of the rotating shaft 11 for transmitting and receiving torque to and from an internal combustion engine (not shown). It is connected to the internal combustion engine via (not shown).

A slip ring 13 for supplying a field current to the field winding 2 a of the rotor 2 is provided, and the slip ring protrudes from the rear bracket 5 to the rear side. A brush 16 slidably contacting the slip ring 13 for energizing the field winding 2a is held by the brush holder 16a.
A front-side fan 21F and a rear-side fan 21R for generating cooling air are attached to both end faces of the field core of the rotor 2. The fans 21F and 21R are both centrifugal fans.

  The magnetic pole position detection sensor 6 detects the magnetic pole position of the rotating shaft 11, that is, the rotor 2. The magnetic pole position detection sensor 6 is positioned between the slip ring 13 and the bearing 8 on the outside of the rear bracket 5 of the rotating shaft 11 and is arranged coaxially with the rotating shaft 11. The magnetic pole position detection sensor 6 includes a sensor stator 6a and a sensor rotor 6b. A sensor rotor 6b having only an iron core is rotatably provided inside the sensor stator 6a.

The connecting board 18 is insert-molded with a connecting terminal 18 a for connecting the stator lead wire 3 b and the power module 9.
The connecting board 18 is fixed to the rear side of the rear bracket 5 with screws.
The stator lead wire 3b passes through the rear bracket 5 and is exposed to the rear side, and is welded to the front side end portion of the terminal 18a of the connecting board 18 at this exposed portion.
After this welding, the second assembly 30 is removably assembled to the rear side of the rear bracket 5, and is insert-molded into the rear end of the connecting terminal 18 a of the connecting board 18 and the case 14 of the second assembly 30. The terminal 14a is fixed with screws, and the stator winding (armature winding) 3a and the power module 9 are electrically connected via the connecting terminal 18a.

Next, the second assembly 30 will be described.
The second assembly 30 includes a plurality of power modules 9 in which switching elements that perform functions of an inverter that supplies an armature current when driving a motor and a converter that rectifies the armature current when generating electric power, together with its peripheral circuits. A field module 10 in which switching elements for controlling the field current are gathered together with peripheral circuits thereof, a power module 9 and the field module 10 mounted thereon, and a heat sink for cooling the power module 9 and the field module 10 31, a case 14 having a terminal connected to a power system terminal of each module, a control board 17 configured with a control circuit for controlling the power module 9 and the field module 10, and a switching surge It is comprised with the capacitor | condenser 20 to absorb.

The brush holder 16 a is disposed in a space 31 s through which the center rotation shaft 11 of the heat sink 31 passes. The brush holder 16a is connected to the field module 10 via a terminal insert-molded in the case 14.
The sensor stator 6 a of the magnetic pole position detection sensor 6 is attached to the heat sink 31. The output signal wiring of the magnetic pole position detection sensor 6 is connected to the control board 17.

The power module 9 and the field module 10 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. Each power module 9 is configured in a trapezoidal shape, and is arranged in an annular shape so that the hypotenuse of the trapezoid is directed substantially in the radial direction. The heat sink cooling fins 31a located immediately below the power module 9 when viewed from the front side (rear side) are arranged so as to be directed in the radial direction.
The heat sink 31 is provided with a plurality of fins 31a radially extending in the radial direction, facing the plurality of power modules 9, 9,... On the side of the plurality of power modules. ing.
In addition, as illustrated in FIG. 3, the cooling air generated by the rotation of the centrifugal fans 21 </ b> F and 21 </ b> R flows between the plurality of fins 31 a toward the radial center.

  As shown in FIGS. 2 and 4, each of the plurality of power modules 9, 9, 9, 9,... Arranged in an annular shape is a trapezoid whose shape in the axial direction is non-equal. The upper base 9TB of each of the power modules of the non-equal trapezoidal shape is located on the radially inner side, and the lower base 9LB is located on the radially outer side. The slope of one leg 9LP1 and the slope of the other leg 9LP2 of each power module of an unequal leg trapezoid are different. In the illustrated example, the slope of one leg 9LP1 is 0 °, The inclination of the leg 9LP2 is about −45 °.

The one leg 9LP1 and the other leg 9LP2 of the adjacent power modules face each other via a gap 9g9 extending in the radial direction, and this gap 9g9 extends from the radially inner end to the radially outer end. Spacing is substantially the same as shown in FIGS. Therefore, the space factor of the plurality of power modules 9, 9,... Is improved, and the radial size can be reduced.
Note that the one leg 9LP1 and the other leg 9LP2 of the adjacent power modules face each other through a gap 9g9 extending in the radial direction, and the gap 9g9 is radially outward from the radially inner end. If the structure in which the distance between the ends is substantially the same as shown in FIGS. 2 and 4 can be formed, the inclination of one leg 9LP1 is necessarily 0 ° and the inclination of the other leg 9LP2 is about −45 °. However, the inclination of one leg 9LP1 may be about + 45 °, and the inclination of the other leg 9LP2 may be 0 °, or may be 45 ° ± α and 0 ° ± α.

  The battery side common terminal 32, also referred to as the B line terminal, and the ground side common terminal 33, also referred to as the GND line terminal, are arranged inside the case 14 in parallel in the axial direction, and each power module 9, 9,. .. are joined by welding or the like to a power supply terminal 9a called a B terminal and a power supply unit 9b called a GND terminal. The welding location of the B terminal (power supply terminal) 9a and the GND terminal (power supply terminal) 9b of each power module 9, 9,... Is joined to the lower side (front side) of the control board 17, ,... Are connected to the control board.

The power terminals 9a, 9b of the power modules 9, 9,... Of the non-equal trapezoidal shape are respectively provided on the upper base 9TB so as to be displaced in the circumferential direction and the axial direction.
A plurality of signal terminal rows 9c of each of the power modules 9, 9,... Of the non-equal trapezoidal shape are respectively provided on the lower base 9LB.

The battery-side common terminal 32 and the ground-side common terminal 33 are both U-shaped when viewed in the axial direction, and are surrounded by a plurality of power modules 9, 9,. Insulated in 31s.
The battery side common terminal 32 is at the same potential (B voltage or battery voltage) as the connecting terminal 18 a and is connected to a B line terminal external connection terminal 320 extending to the outside of the case 14.
The ground side common terminal 33 has the same potential as the rear bracket 5 (GND potential or ground potential), and is connected to the B line terminal external connection terminal 320 extending to the outside of the case 14.
The ground side common terminal 33 and the battery side common terminal 32 are arranged in parallel to the axial direction, and the direction of the current flowing through the ground side common terminal is opposite to the direction of the current flowing through the battery side common terminal.

  After the assembly of the second assembly 30, the second assembly 30 is mounted on the rear side of the rear bracket 5 of the first assembly 40, and then the protective cover 15 is mounted.

As described above, according to the first embodiment, the power module is configured in a trapezoidal shape, and the oblique sides of the trapezoid are arranged in an annular shape so as to be directed substantially in the radial direction, thereby reducing the dead space and reducing the outer diameter of the power module. Since the heat sink cooling fins below the power module are arranged in the radial direction, the heat sink cooling fins can be efficiently arranged at an equal pitch, and the power module is efficiently cooled.
Further, since the heat sink cooling fins are arranged so as to be directed in the radial direction, the cooling air is efficiently introduced toward the center, and the cooling performance can be improved.
Moreover, since all the power modules are configured in the same shape, the cost can be reduced.

Embodiment 2. FIG.
The second embodiment of the present invention will be described below. FIG. 5 is a front view of the inverter assembly (second assembly) viewed from the front side (rear side) with the protective cover removed. However, constituent elements and similar elements in the first embodiment are given the same reference numerals. Since the basic configuration is the same as that of the first embodiment, a description thereof will be omitted.

  As shown in FIG. 5, a plurality of signal terminal rows 9c of each of the power modules 9, 9,... Of the control device are arranged in a row in the circumferential direction, and the signal terminals 9c of all the power modules are The second assembly 30 having an inverter function is disposed on the outer wall side (the trapezoid base) of the case 14.

  As described above, according to the second embodiment, since the signal terminal 9c is arranged on the outer wall side of the case, the component mounting of the control board can be effectively utilized. Moreover, since the component mounting area of the control board can be used effectively, the inverter can be downsized.

In the present invention, the embodiments can be appropriately combined, modified, and omitted within the scope of the invention.
In addition, in each figure, the same code | symbol shows the same or equivalent part.

1 rotating electrical machine, 2 rotor, 2a field winding, 3 stator, 3a three-phase stator winding,
3b Stator lead wire, 4 front bracket, 5 rear bracket,
6 magnetic pole position detection sensor, 6a sensor stator, 6b sensor rotor,
7 bearings, 8 bearings, 9 non-regular trapezoidal power modules,
9a Power module's B terminal (power supply terminal), b Power module's GND terminal (power supply terminal), 9c Power module's signal terminal, 9LB Lower base of power module with non-equal legs, 9LP1 One leg of the power module,
9LP2 The other leg of the trapezoidal power module with an unequal leg, the upper base of the 9TB trapezoidal power module with an unequal leg, the gap between the 9g9 power modules, the 10 field module,
11 Rotating shaft, 12 Pulley, 13 Slip ring, 14 Case, 14a Insert-molded terminal, 15 Cover, 16 Brush, 16a Brush holder, 17 Control board, 18 Connecting board, 18a Connecting terminal, 19a Inserting into connecting board 19b connecting terminal to the stator coil side, 19b connecting terminal terminal to the power module side, 20 capacitor, 21F front fan, 21R rear fan, 30 inverter assembly (second assembly) ), 31 heat sink,
31a Heat sink cooling fin, space surrounded by 31s power module, 32 B line terminal (battery side common terminal), 320 B line terminal external connection terminal, 33 GND line terminal (ground side common terminal), 330 GND line terminal external connection terminal 40 Motor assembly (first assembly)

Claims (9)

A first assembly of a motor having a stator and a rotor, and a second assembly of a control device for controlling the motor, wherein the first assembly and the second assembly are integrally and coaxially assembled. A controller-integrated rotating electrical machine,
The control device includes a plurality of power modules that supply power to the motor, and a heat sink that cools the plurality of power modules,
The plurality of power modules are arranged in an annular shape in the circumferential direction,
Each of the plurality of power modules is a trapezoid with a non-regular shape when viewed in the axial direction,
The upper base of each power module of the trapezoidal unequal leg is located on the radially inner side and the lower base is located on the radially outer side, respectively.
The inclination of one leg of each power module of the trapezoid of the non-equal leg is different from the inclination of the other leg,
The circumferential direction of each power module of the non-equal leg trapezoid is the same,
The one leg and the other leg of the adjacent power modules are opposed to each other through a gap extending in the radial direction,
The gap has the same distance from the radially inner end to the radially outer end,
The heat sink is provided with a plurality of fins radially extending in a radial direction and provided on the side of the plurality of power modules so as to face the plurality of power modules. Controller-integrated rotating electrical machine.     The controller-integrated rotating electrical machine according to claim 1, wherein cooling air flows between the plurality of fins toward a radial center. The gap is, controller-integrated electric rotating machine according to claim 1 or 2, characterized that you have linearly extending What Wataru from its radially inner end to the radially outer end. Each of the plurality of power modules, controller-integrated electric rotating machine according to any one of claims 1 to 3 in which the columns of the plurality of signal terminals, characterized that you have had the lower base . Controller-integrated electric rotating machine according to claim 4, rows of said signal terminals of each of the plurality of power modules and wherein a row der Rukoto circumferentially. Wherein each of the plurality of power modules, a power supply terminal and forming a pair, controller-integrated electric rotating machine according to claim 1, any one of 4, wherein that you have had the upper base. The ground-side terminal of the power supply terminal forming the each of the pair of the plurality of power modules is connected to the ground side common terminal, said plurality of power modules each power supply terminal said pair of battery-side terminal battery side common terminal The controller-integrated dynamoelectric machine according to any one of claims 1 to 6, wherein the controller-integrated dynamoelectric machine is connected to the controller. The ground-side common terminal and the battery side common terminal is insulated from it is arranged in a space surrounded by the plurality of power modules arranged annularly in the circumferential direction in claim 7, wherein The controller-integrated rotating electrical machine described. The ground-side common terminal and the battery side common terminal is disposed in parallel to the axial direction, and the direction of the current flowing in the direction of the current flowing to the ground side common terminal wherein the battery side common terminal is Ru opposite der The controller-integrated dynamoelectric machine according to claim 7 or 8.

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