Thermal, Thermoelastic, and Dynamic Effects in Electrical Brushes

集电器(电刷)的磨损是电机故障的主要原因，而且，由此产生的停机维修时间严重影响了生产率。这项工作的目的是提供一个改进的高电流密度电刷物理理论模型，包括动态和热弹性效应。具体地说，将研究电流、转子转速和几何形状、接触力等主体变量对电刷中缓慢移动的热点形成的影响。随着对画笔物理的更好理解，该模型应该会导致改进画笔设计。

Wear of current collectors (electrical brushes) is a major cause of failure in motors, further, resultant down time for repair has a serious impact on productivity. The objective of this effort is to provide an improved theoretical model of high current density brush physics that includes both dynamic and thermoelastic effects. Specifically, the effects of bulk variables such as current, rotor speed and geometry, contact force, and others on the formation of slowly moving hot spots in the brush will be investigated. With better understanding of brush physics, the model should lead to improved brushdesign.