摘要
继电器的触头弹跳是无法避免的,它通常是引起电气磨损和材料侵蚀的主要原因。本文利用模态展开形式对航天继电器的两种不同的簧片系统的动态行为进行了分析研究。该动力学模型在悬臂梁系统中使用了Euler-Bernoulli梁理论,其中考虑了电磁系统的驱动力(或驱动力矩),采用Kelvin-Voigt黏弹性体接触模型模拟动静触头间的接触力。采用有限差分法计算簧片系统的非线性偏微分方程对解析结果进行了补充。计算结果表明:随着驱动力(或驱动力矩)的增加,触头的闭合时间会减小,但最大的弹跳高度和弹跳时间有先减小后增大的趋势,故其有一最小值。随着推动杆逐渐靠近触头,触头的闭合时间、最大弹跳高度和时间均有减小的趋势。在今后的设计中,该模型能用作提高继电器性能和减小弹跳的设计工具。
Contact bounce of relay, which is the main cause of electric abrasion and material erosion, is inevitable. By using the mode expansion form, the dynamic behavior of two different reed systems for aerospace relays is analyzed. The dynamic model uses Euler-Bernoulli beam theory for cantilever beam, in which the driving force (or driving moment) of the electromagnetic system is taken into account, and the contact force between moving contact and stationary contact is simulated by the Kelvin-Voigt vis-coelastic...
关键词
航天继电器
动态分析
有限差分法
接触弹跳
簧片系统
aerospace relay
dynamic analysis
finite difference method
contact bounce
reed system
