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Vehicular rotary electric machine

a rotary electric machine and electric motor technology, applied in the direction of current collectors, dynamo-electric machines, supports/encloses/casings, etc., can solve the problems of more stringent requirements for electric machines and more than ever for vibration durability performance, so as to achieve the effect of improving vibration resistan

Active Publication Date: 2009-12-10
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]The present invention has been made to solve the foregoing problems, and an object of the present invention is to provide a vehicular rotary electric machine in which a connecting portion between a field circuit section and a brush holder is configured by an intermediate wiring member in which connecting terminals are separately formed from the field circuit section and a stress buffering mechanism is provided in the intermediate wiring member, whereby vibration applied to the connecting portion is absorbed and vibration resistance is improved.
[0010]According to a vehicular rotary electric machine of the present invention, an intermediate wiring member which connects a field circuit section to a brush holder, the field circuit section and the brush holder being separately mounted to a bracket, and absorbs residual stress due to each positional deviation of the field circuit section and the brush holder, whereby vibration resistance can be improved.

Problems solved by technology

On the other hand, durability of the vehicular rotary electric machine has been more strictly required, and vibration durability performance has been required more than ever before.

Method used

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  • Vehicular rotary electric machine
  • Vehicular rotary electric machine
  • Vehicular rotary electric machine

Examples

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embodiment 1

Preferred Embodiment 1

[0020]A preferred embodiment of a vehicular rotary electric machine according to the present invention will be described in detail with reference to the accompanying drawings.

[0021]FIGS. 1 to 3 are views each showing a preferred embodiment 1 of the vehicular rotary electric machine according to the present invention; FIG. 1 is a top view from the rear of the vehicular rotary electric machine; FIG. 2 is a cross-sectional of the side thereof; and FIG. 3 is a perspective view showing a field circuit section and a brush holder portion. In FIGS. 1 to 3, the vehicular rotary electric machine of the preferred embodiment 1 has a stator 2a and a rotor 3 supported by a bracket 1; and the rotor 3 has a field winding 4 which is for generating a magnetomotive force, a slip ring 5, and a cooling fan 6. A power transmission portion is provided in front of the bracket 1; on the backward side thereof, a brush holder 8 having a brush 7 which comes in contact with the slip ring 5...

embodiment 2

Preferred Embodiment 2

[0033]FIG. 6 is a top view showing a field circuit section of a vehicular rotary electric machine according to a preferred embodiment 2 of the present invention. In addition, referring to the drawings, the same reference numerals as those shown in the preferred embodiment 1 represent the same or corresponding elements.

[0034]The intermediate wiring member 34 of the preferred embodiment 1 has a shape which covers a part of the entire mounting face with respect to the field circuit section 30; however, in the preferred embodiment 2, the shape of a planar face portion 34b is changed to an intermediate wiring member 34 which seems to cover the entire field circuit section as shown in FIG. 6.

[0035]A field circuit section 30 is configured by jointing a metal substrate 38 to a heat sink for cooling field system 32, the metal substrate 38 being mounted with semiconductor switching elements for field system 31 and a control IC (not shown in the drawing) which are for sup...

embodiment 3

Preferred Embodiment 3

[0038]FIGS. 7A, 7B, and 8 are views each showing an intermediate wiring member of a vehicular rotary electric machine according to a preferred embodiment 3 of the present invention. In addition, referring to the drawings, the same reference numerals as those shown in the preferred embodiments 1 and 2 represent the same or corresponding elements.

[0039]In the case where a width of the metal wiring material 34a for use in the intermediate wiring member 34 of the preferred embodiments 1 and 2 is enlarged, the percentage of the metal wiring material 34a inserted into the planar face portion 34b increases; and accordingly, the intermediate wiring member 34 becomes difficult to be deflected. However, in the preferred embodiment 3, a stress buffering mechanism is made by providing an elastic region in the metal wiring material 34a.

[0040]That is, as shown in FIGS. 7A and 7B, the elastic region, that is, a bent portion is provided by changing the shape in the vicinity o...

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Abstract

A vehicular rotary electric machine has a stator and a rotor supported by a bracket; a field winding which is provided on the rotor and is for generating a magnetomotive force; a field circuit section which is for supplying a current to the field winding; and a brush holder having a brush, the field circuit section and the brush holder being separately mounted to the bracket. In the vehicular rotary electric machine, connecting means between the field circuit section and the brush holder is configured by an intermediate wiring member having a stress buffering mechanism.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a field winding type rotary electric machine mounted with a field circuit section which supplies a field current to a field winding of a rotor and, more particularly, relates to a vehicular rotary electric machine to be mounted in an automobile.[0003]2. Description of the Related Art[0004]In Japanese Unexamined Patent Publication No. 2008-5676, a hitherto known structure of a field winding type vehicular rotary electric machine is shown. In the field winding type vehicular rotary electric machine shown in Japanese Unexamined Patent Publication No. 2008-5676, a magnetomotive force is produced by supplying a current to a field winding provided on a rotor and generation of electricity is performed; and a current adjusted by a field circuit section is supplied from a brush incorporated in a brush holder to the field winding through a slip ring provided in the rotor. There is described a conf...

Claims

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Application Information

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IPC IPC(8): H01R39/38
CPCH01R39/385H02K9/28H02K5/24H02K5/141
Inventor SHIRAKATA, YUJIKIKUCHI, MASAOMAEDA, NAOHIDE
Owner MITSUBISHI ELECTRIC CORP