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Metal-graphite brush and motor including a metal-graphite brush

A metal graphite and electric motor technology, applied in the field of electric motors, can solve the problems of influence and unfavorable service life of the electric motor, and achieve the effect of reducing the degree of wear and the coefficient of sliding friction

Inactive Publication Date: 2005-11-02
AISIN SEIKI KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the service life of motors with the aforementioned metal-graphite brushes is adversely affected

Method used

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  • Metal-graphite brush and motor including a metal-graphite brush
  • Metal-graphite brush and motor including a metal-graphite brush
  • Metal-graphite brush and motor including a metal-graphite brush

Examples

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Effect test

example 1

[0074] The continuous operation of the slip ring with the metal grinding brush 1 was investigated, in which a polyethylene glycol monomethyl ether liquid 21 was penetrated as the liquid 21 . According to the research results, as attached Figure 13 As shown, when the operating temperature of the slip ring is in the range of about 120°C to 200°C, the amount of wear is limited to a low level; but when the operating temperature of the slip ring is higher than about 200°C, as long as the slip ring continues for a long time Running, the amount of wear will increase. In addition, in the temperature range of about 80-150°C, the amount of wear does not increase with the increase of the temperature of the slip ring in continuous operation. In other words, when the brush 1 operates in the temperature range of 80°C to 150°C, the amount of steam of polyethylene glycol monomethyl ether between the brush 1 and the sliding contact surface of the slip ring increases with the temperature of t...

example 2

[0076] The continuous operation of the slip ring with metal stone grinding brushes 1 was investigated, in which polyethylene glycol polypropylene glycol monomethyl ether was impregnated as liquid 21 . According to the research results, as attached Figure 14 As shown, when the operating temperature of the slip ring is in the range of about 120°C to 220°C, the amount of wear is limited to a low level; but when the operating temperature of the slip ring is higher than about 200°C, if the slip ring With continuous operation, the amount of wear will increase. In addition, when operating continuously in the temperature range of about 80-180°C, the amount of wear will not increase with the increase of the temperature of the slip ring. That is to say, when the brush 1 operates in the temperature range of 80°C to 180°C, the amount of steam of polyethylene glycol polypropylene glycol monomethyl ether between the brush 1 and the sliding contact surface of the slip ring increases with t...

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Abstract

A metal-graphite brush for supplying electricity to a coil wound around a core provided at a rotor of a motor is made of sintered material having porosities at a surface of, or inside, the sintered material. The metal-graphite brush is infiltrated by a liquid containing a plurality of kinds of glycol ether having varying numbers of alkylene oxide structure units. The liquid has a boiling point higher than that of water.

Description

technical field [0001] The present invention mainly relates to a metal-graphite brush for supplying power to a motor rotor, and a motor including the metal-graphite brush. More specifically, the present invention relates to a metal-graphite brush that does not wear out even when operated at a high temperature equal to or higher than 100 degrees Celsius, thereby extending the life of the brush and a motor including the brush. service life. Background technique [0002] For motors with brushes, power is supplied through the brushes in sliding contact with the commutator. Coils wound around the rotor core are connected to the commutator. When power is supplied to the coil, the rotor starts to rotate due to the attractive and repulsive force of the permanent magnets disposed inside the motor housing and facing the rotor. [0003] In the motor having the above structure, when the motor is running, the brushes slide relative to the commutator that is in contact therewith. In t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K13/00H01R39/22H01R39/26H02K23/00
CPCH01R39/22H01R39/26
Inventor 小林博五月女道彦
Owner AISIN SEIKI KK
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