冲击时的电接触现象

Electrical Contacts - 1991 Proceedings of the Thirty-Seventh IEEE HOLM Conference on Electrical Contacts Pub Date : 1900-01-01 DOI:10.1109/HOLM.1991.170814

J. McBride, S. Sharkh

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引用次数: 37

摘要

作者概述了冲击理论，因为它适用于电接触。对恢复系数的概念进行了评估，作为对撞击事件进行建模的一种手段。电触点冲击过程中发生的事件对触点的长期可靠性至关重要;因此，设计参数对冲击和弹跳动力学的影响是必须考虑的。实验研究包括冲击力、冲击时间、电流和电压特性的测量。预冲击电弧的影响在中等电流范围内进行了评估，并显示对第一次冲击期间发生的事件有影响。提出了电接触弹跳的数学模型，但表明减小电弧不一定能减小接触磨损。

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Electrical contact phenomena during impact

The authors outline the theory of impact as it applies to electrical contacts. The concept of the coefficient of restitution is evaluated as a means of modeling the events at impact. The events occurring during the impact of electrical contacts are vital to the long-term reliability of the contacts; so design parameters are considered in terms of their influence upon the dynamics of impact and bounce. Experimental studies are presented which include the measurement of impact forces, impact time, and both current and voltage characteristics. The influence of preimpact arcing is evaluated in the medium current range, and is shown to have an effect on the events occurring during the first impact. A mathematical model is proposed for electrical contact bounce, but it is shown that reducing the arcing may not always reduce contact wear.<>

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来源期刊

Electrical Contacts - 1991 Proceedings of the Thirty-Seventh IEEE HOLM Conference on Electrical Contacts

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