JP2009044869A - Rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electric machine which can reduce the size in the rotor rotation axis direction and can shorten the assembling process in the rotary electric machine, such as a motor or a power generator for leading out a lead wire connected to a terminal board in the rotor rotating axis direction. <P>SOLUTION: The lead wire 22 is led out to the coil end of a stator coil 21 of respective phases, and the lead wire 22 and a terminal member 23 are connected. A long hole is formed in the terminal member 23, in the rotor rotation axis direction so that the rotor rotation axis direction can be adjusted finely. Likewise, a long hole is formed in the terminal board 30 in a rotor radial direction so that the rotor radial direction can be adjusted finely. Female screws 28 are arranged at both ends of the bus bar 25, and positioning can be performed freely, by moving screws 24 and 26 inserted into the terminal member 23 and the terminal board 30 in the long holes. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine that is an electric motor or a generator, and in particular, a terminal block that connects a stator having a stator coil, a rotor that is rotatably provided in the stator, a power line that transmits electric power, and the stator coil. And a rotary electric machine.

  Conventionally, there are an electric vehicle, a hybrid vehicle, a fuel cell vehicle, and the like as a vehicle for driving the vehicle by an electric motor. In these vehicles, an electric motor is generally provided in a driving device that transmits power to wheels, and the electric motor and the like are also lubricated and cooled with oil. Further, the electric power supplied to the electric motor is converted into a high voltage by an inverter and supplied to the electric motor in order to improve the running performance of the vehicle.

  Since the electric motor is driven by a high-voltage three-phase alternating current converted by the inverter, the power line connecting the inverter and the electric motor has three power lines (hereinafter referred to as power cables) having high voltage and large current capacity. .) Each power cable and each winding terminal of the electric motor are fixed to each other by screwing to a terminal block that secures a space insulation distance with other metal parts. For this reason, the terminal block connecting the power cable and the winding of the stator occupies a relatively large space for the electric motor.

  For example, in the electric motor shown in Patent Document 1, the lead wire drawn in the radial direction of the rotor is configured to be connected to the terminal block while being slightly shifted in the radial direction of the rotor and the rotation axis direction of the rotor. When the electric motor is attached to the drive device, the lead wire can be moved to a position where it can be screwed to the terminal block. However, when the lead wire and the terminal block are connected using this terminal block, there is a problem that the terminal block becomes larger in the radial direction so that the terminal block can be connected even if the lead wire moves.

  Patent Document 2 discloses a technique for solving such a problem and reducing the size of the electric motor in the rotation axis direction. 4 shows the configuration of the electric motor of Patent Document 2. The electric motor 200 of FIG. 4 includes a case 40, a stator 20, a rotor 10 that rotates in the stator, and a power cable (not shown) that transmits electric power to the stator 20. A terminal block 30 to be connected and a case 40 are provided.

  The rotor 10 includes a rotating shaft 11 and a permanent magnet fixed to the rotating shaft 11, the case 40 includes a bearing 12 that holds the rotating shaft 11, and a terminal block 30, and the stator 20 includes a stator core 27. And a U-phase, V-phase, and W-phase stator coil 21. Lead wires 22 are taken out from the coil ends of the stator coils 21 of the respective phases, and terminal members 23 are connected to the respective lead wires 22. Furthermore, each terminal member 23 is bent in an L shape in the radial direction from the rotation direction of the rotor 10, and a long hole is provided in the central portion of the terminal member 23.

  Here, the L-shaped terminal member 23 is arranged in the rotational axis direction of the rotor 10, and the lead wire 22 whose position is adjusted and the terminal member 23 arranged in the radial direction of the rotor 10 are used as power. The wire is fixed to the terminal block 30. By using the terminal member 23 and the terminal block 30 as described above, it is possible to reduce the size in the direction of the rotation axis in the electric motor 200 of the type in which the lead wire 22 is taken out in the direction of the rotation axis of the rotor 10.

  FIG. 5 shows an assembly process (C) in which the terminal block 30 is attached from the processing process (A) in which the terminal member 23 connected to the lead wire 22 is bent. FIG. 5A shows the state of the stator 20 housed in the case 40, and the lead wire 22 extends from the stator coil 21 around which the stator core 27 is wound, and the terminal member 23 is connected to the lead wire 22. In this state, the lead wire 22 and the terminal member 23 extend in a straight line from the coil end in the direction of the rotation axis, and are approximately positioned in the diameter direction in consideration of the height of the terminal block 30. Next, the lead wire 22 is fixed by impregnating the coil end with varnish.

  As shown in FIG. 5 (B), in order to attach the terminal member 23 in accordance with the position of the surface of the terminal block 30 in the rotation axis direction, the terminal member 23 is L using a lead wire fixing tool 61 and a bending tool 62. Bend into a letter shape. Thereafter, as shown in FIG. 5C, the lead wire fixing tool 61 and the bending tool 62 are removed, the terminal block 30 is attached, and the terminal block 30 and the terminal member 23 are fixed by the screws 24.

JP 11-98755 A JP 2005-151660 A

  When the technique shown in Patent Document 2 described above is used, the arrangement space of the electric motor in the rotation axis direction and the radial direction of the rotor can be reduced. However, it is necessary to perform a bending step of bending the terminal member into an L-shape in order to position the lead wire attached to the motor case and to position in the rotation axis direction, and it is difficult to further shorten the assembly step.

  Therefore, the present invention provides a rotating electrical machine that can reduce the size in the direction of the rotating shaft in a rotating electrical machine such as an electric motor or a generator that is taken out in the direction of the rotating shaft of the rotor, and can shorten the assembly process. Objective.

  In order to achieve the above object, a rotating electrical machine according to the present invention connects a stator having a stator coil, a rotor provided rotatably in the stator, a power line for transmitting electric power, and the stator coil. In a rotating electrical machine comprising a terminal block, a coil terminal taken out from the coil end of the stator coil in the rotation axis direction of the rotor, a bus bar having one end connected to the coil terminal and the other end connected to the terminal block, The bus bar is an L-shaped conductive metal having one end connected to the coil terminal, the other end facing the coil end, and bent from the rotation axis direction of the rotor to the radial direction of the rotor. And

  In the rotating electrical machine according to the present invention, one end of the bus bar is fixed to the coil terminal with a screw, and the other end of the bus bar is fixed to the terminal block facing the coil end with the screw.

  Furthermore, in the rotating electrical machine according to the present invention, the coil terminal has a long hole extending in the rotation axis direction of the rotor, the terminal block has a long hole extending in the rotor radial direction, and the bus bar is screwed at both ends. The terminal block and the coil terminal are adjustably connected by two screws.

  By using the present invention, the position of the lead wire attached to the case is positioned, and the rotor rotating shaft can be obtained without performing a bending process of bending the terminal member into an L-shape for positioning in the rotating shaft direction. There is an effect that it is possible to reduce the size in the direction of the rotation axis in a rotating electrical machine such as an electric motor or a generator that is taken out in the direction.

  Hereinafter, embodiments of the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings. In addition, since the electric motor and generator which are the rotary electric machines which concern on this invention have the same structure, the description regarding a generator is omitted and an electric motor is described. The same members as those in the conventional configuration are denoted by the same reference numerals, and redundant description is omitted.

(First embodiment)
FIG. 1 shows the configuration of an electric motor 100 in the first embodiment. A lead wire 22 is taken out from the coil end of the stator coil 21 of each phase, and the lead wire 22 and the terminal member 23 are connected. The terminal member 23 is provided with a long hole in the rotor rotation axis direction, and fine adjustment in the rotor rotation axis direction is possible. Similarly, the terminal block 30 is provided with a long hole in the rotor radial direction, and fine adjustment in the rotor radial direction is possible. Furthermore, female screws 28 are provided at both ends of the bus bar 25, and the screws 24 and 26 inserted into the terminal member 23 and the terminal block 30 can be freely positioned by moving through the long holes.

  A conductive bar 34 is provided inside the terminal block 30, the bus bar 25 and the conductive bar 34 are connected by screws 26, and the conductive bar 34 is connected to the power cable terminal 32 by screws 31. Further, the power cable terminal 32 is connected to the power cable 33.

  FIG. 2 shows a terminal block portion in the present embodiment. A characteristic feature of the present embodiment is that the terminal member 23 is adjusted by using the bus bar 25 that adjusts the position in the rotor rotation axis direction and the rotor radial direction shown in FIG. And the terminal block 30 are combined.

  Yet another matter is that the bus bar 25 extending in the rotor radial direction is disposed at a position facing the coil end surface of the stator coil 21. With this arrangement, the screws 24 and 26 overlap in the rotor rotation axis direction, so that the length in the rotor rotation axis direction can be shortened.

(Second Embodiment)
FIG. 3 shows a terminal block portion in the electric motor according to the second embodiment. The difference from the first embodiment is that a bus bar 25 extending in the rotor diameter direction is disposed on the surface opposite to the coil end surface of the stator coil 21. By adopting such an arrangement, the terminal member 23 is fixed in a space surrounded by an L shape, although it extends in the rotor rotation axis direction by the plate pressure (L) of the bus bar 25 from the first embodiment. A sufficient space insulation distance can be obtained by hiding the screw 24, and the rotor rotation axis direction and the rotor shown in FIG. 2 can be obtained without bending the terminal member 23 when assembling the terminal member 23 as in the first embodiment. The terminal member 23 and the terminal block 30 can be coupled using the bus bar 25 that adjusts the radial position.

  As described above, by using this embodiment, the bending process of positioning the lead wire attached to the case and bending the terminal member into an L-shape for positioning in the rotation axis direction is performed. Without performing this, it is possible to reduce the size in the direction of the rotating shaft in a rotating electric machine such as an electric motor or a generator that is taken out in the direction of the rotor rotating shaft.

  In addition, although this embodiment demonstrated the electric motor, it is not limited to this, and it cannot be overemphasized that you may use for the generator which has the same structure.

It is sectional drawing which shows the structure of the electric motor which concerns on the 1st Embodiment of this invention. It is the expanded sectional view which expanded the terminal block part in the electric motor which concerns on the 1st Embodiment of this invention. It is the expanded sectional view which expanded the terminal block part in the electric motor which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the structure of the conventional electric motor. It is explanatory drawing explaining the assembly process of the terminal block part in the conventional electric motor.

Explanation of symbols

  10 rotor, 11 rotating shaft, 12 bearing, 20 stator, 21 stator coil, 22 lead wire, 23 terminal member, 24, 26, 31 screw, 25 bus bar, 27 stator core, 28 female screw, 30 terminal block, 32 power cable terminal, 33 Power cable, 34 Conductive bar, 40 Case, 61 Lead wire fixing tool, 62 Bending tool, 100, 110, 200 Electric motor.

Claims (3)

In a rotating electrical machine comprising a stator having a stator coil, a rotor rotatably provided in the stator, and a terminal block for connecting a power line for transmitting electric power and the stator coil,
A coil terminal taken out from the coil end of the stator coil in the direction of the rotation axis of the rotor;
A bus bar having one end connected to the coil terminal and the other end connected to the terminal block;
With
The bus bar is an L-shaped conductive metal having one end connected to the coil terminal, the other end facing the coil end, and being bent from the rotation axis direction of the rotor to the radial direction of the rotor. Electric. In the rotating electrical machine according to claim 1,
One end of a bus bar is fixed to a coil terminal with a screw, and the other end of the bus bar is fixed to a terminal block facing the coil end with a screw. In the rotating electrical machine according to claim 1 or 2,
The coil terminal has a long hole extending in the rotation axis direction of the rotor,
The terminal block has a long hole extending in the rotor radial direction,
The bus bar has nuts for fixing screws at both ends, and the terminal block and the coil terminal are connected to each other by two screws so as to be adjustable.

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