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Rotating electrical machine

一种旋转电机、电刷的技术，应用在旋转式集电器、电路、集电器等方向，能够解决磨损速度变大、电刷寿命降低等问题，达到防止温度过度上升的效果

Active Publication Date: 2013-12-18
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, when the brush is in a high-temperature state, the wear rate increases, so there is a problem that the life of the brush is reduced

Method used

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  • Rotating electrical machine
  • Rotating electrical machine
  • Rotating electrical machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0037] Hereinafter, a rotating electrical machine according to Embodiment 1 of the present invention will be described with reference to the drawings. figure 1 It is a cross-sectional view of the rotating electrical machine according to Embodiment 1 of the present invention. The rotating electric machine according to Embodiment 1 shows an alternator motor (motor generator) for a vehicle, but it can also be applied to an alternator for a vehicle.

[0038] exist figure 1 Among them, the rotating electrical machine 100 includes: a front bracket 6 and a rear bracket 7 as a casing; a rotating shaft 1, which is supported to be freely rotatable by a bearing 19a of the front bracket 6 and a bearing 19b of the rear bracket 7; a stator 5, which 5 is fixed on the front support 6 and the rear support 7, and has an armature winding; the rotor 10, which is fixed on the rotating shaft 1 and has an excitation core 2 and an excitation winding 3; and a pulley 20, which is fixed to the rotating...

Embodiment approach 2

[0059] Figure 5 It is a schematic diagram showing a cross section including a connection surface between a brush holder and a heat sink of the rotating electric machine according to Embodiment 2 of the present invention. exist Figure 5 Among them, the first metal member 810 of the brush cooling metal member 81 exposed from the brush holder 80 extends toward the base surface 30g1 side of the heat sink 30g, and its end 8101 is folded so as to face the base surface 30g1 of the heat sink 30g. Curved to form a protrusion. The end portion 8101 of the first metal member 810 abuts and is connected to the base surface 30g1 of the heat sink 30g.

[0060]According to the second embodiment, the contact area of ​​the connecting portion between the brush cooling metal member 81 and the heat sink 30g can be set to be large. Therefore, the thermal contact resistance of the connecting portion can be reduced, which is advantageous in terms of dissipating heat from the brush 8 . In additio...

Embodiment approach 4

[0064] Figure 7 is a perspective view of a resin-molded brush holder of a rotating electrical machine according to Embodiment 4 of the present invention, Figure 7 (a) shows the brush holder, Figure 7 (b) shows the brushes, the terminals for energization, and the metallic member for cooling the brushes provided inside the brush holder. Such as Figure 7 (a), Figure 7 As shown in (b), the brush cooling metal member 81 is composed of a first metal member 810, a second metal member 811 and a plurality of third metal members 812, wherein the first metal member 810 is along the periphery of the brush 8. Surface configuration, the second metal member 811 extends from the surface of the first metal member 810 in a direction at right angles, and the plurality of third metal members 812 extends from the surface of the first metal member 810 in a direction at right angles, and is bent in the middle Roughly at right angles. The first metal member 810 is embedded in the resin cons...

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PUM

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Abstract

[Problem] To provide a rotating electrical machine capable of efficiently release heat generated near a contact portion between a brush and a slip ring to the outside of a brush holder to thereby prevent the temperature of the brush from excessively increasing. [Solution] A brush holder for holding a brush for supplying a field current to a field winding via a slip ring is provided with a current-carrying terminal for electrically connecting a field circuit and the brush, and a brush cooling metallic member for cooling the brush, and heat generated near a contact portion between the brush and the slip ring is released to the outside of the brush holder by means of the brush cooling metallic member.

Description

technical field [0001] The present invention relates to a rotating electrical machine, and particularly relates to a structure of a brush holder capable of preventing temperature rise of brushes and the brush holder. Background technique [0002] Conventionally, in a field-coil type rotating electrical machine for vehicles, for example, a field current is supplied from a brush to a field coil of a rotor via a slip ring. At this time, the brush slides while being pressed by a spring mounted behind the brush. Brushes and slip rings generate heat due to electrical losses in sliding parts, sliding friction, and electrical losses in the respective energization paths. One set of slip rings and brushes is provided on the positive side and one set on the negative side. These brushes and slip rings are generally covered and held by insulating resin or the like in order to ensure electrical insulation between the positive electrode side and the negative electrode side. [0003] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K9/28
CPCH02K9/28H01R39/38H02K5/141H02K5/225H02K19/365
Inventor 深濑达也矶田仁志前田直秀藤田畅彦中岛泰
Owner MITSUBISHI ELECTRIC CORP
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