机械设计参数对电接触性能的影响

Proceedings of the Thirty Fifth Meeting of the IEEE Holm Conference on Electrical Contacts Pub Date : 1989-09-18 DOI:10.1109/HOLM.1989.77932

Karl-Erik Olsson, A. Oberg

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引用次数: 3

摘要

根据机械设计参数，分析了长期使用数据以及电流循环测试的接触电阻数据。研究了表面力恒定时接触面压力分布的重要性。对于所研究的接触类型，用有限元方法计算了作用在接触表面上的机械应力。研究发现，较高的比接触压力有助于降低接触电阻，有利于其长期稳定。接触表面的压力分布对所研究的连接器的老化性能有显著影响。结果表明，制备方法对合金的时效行为有较大影响。在接触表面检测到的老化机制是微动和金属间相的形成。

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Influence of mechanical design parameters on electrical contact performance

Long-time service data as well as data from current cycle testing on electrical contact resistance have been analyzed with respect to mechanical design parameters. The importance of the pressure distribution over the contact surface was studied for a constant surface force. The mechanical stresses acting over the contact surface have been calculated by the finite-element method for the type of contact investigated. It is found that a high specific contact pressure promotes lower contact resistance and favors their long-time stability. The pressure distribution on the contact surface has a significant influence on the aging properties of the connectors studied. It was confirmed that the aging behavior is strongly affected by the preparation methods. The aging mechanisms detected on the contact surfaces studied are fretting and formation of intermetallic phases.<>

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Proceedings of the Thirty Fifth Meeting of the IEEE Holm Conference on Electrical Contacts

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