IEEJ Journal of Industry Applications最新文献

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Mechanism of the Sliding Contact of a Ag Ag–Graphite Brush against a Au Au-plated Slip Ring for Varying Ag Content 银-银-石墨电刷与镀金滑环在不同银含量下的滑动接触机理

Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEJ Journal of Industry Applications

Pub Date : 2023-01-01 DOI: 10.1541/ieejjia.23003850

Naoki Fukuda, Koichiro Sawa, Minoru Aoyagi, Takahiro Ueno

Brushes enable the transfer of electrical current between stationary and moving conductors. Typical contacting components are a brush and commutator in direct-current machines and a brush and slip ring in alternating-current machines. In recent years, Ag–graphite brushes and noble-metal-coated slip rings have often been applied. However, there are many aspects concerning the sliding contact of these components that require clarification. This paper focuses on characteristics relating to the brush wear and contact voltage drop of Ag–graphite brushes when the Ag content is varied for a Au-plated slip ring. In this study, we conducted sliding tests, using Ag–graphite brushes (coated with Ag contents of 50, 60, 70, 80, and 90 wt%) and a Au-coated slip ring. The results showed the effects of the interposing layer on the brush wear and drop in contact voltage. In particular, there were three distinct compositional zones, namely a zone where the effect of graphite was dominant (Ag content of the brush of 50 wt%), a zone where both the graphite and Ag powder had influence (60–80 wt%), and a zone where the effect of Ag powder was dominant (90 wt%).

电刷使电流能在静止导体和运动导体之间传递。典型的接触元件是直流电动机中的电刷和换向器，交流电动机中的电刷和滑环。近年来，银石墨电刷和贵金属涂层滑环被广泛应用。然而，关于这些部件的滑动接触有许多方面需要澄清。本文着重研究了镀金滑环银含量变化时银-石墨电刷的电刷磨损和接触电压降的特性。在这项研究中，我们使用银石墨刷(镀有50%、60%、70%、80%和90%的银)和镀有au的滑环进行滑动测试。结果表明，插入层对电刷磨损和接触电压下降有显著影响。特别是，有三个不同的组成区域，即石墨影响占主导地位的区域(电刷中银含量为50 wt%)，石墨和银粉都有影响的区域(60-80 wt%)，以及银粉影响占主导地位的区域(90 wt%)。

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