摘要
继电器接触系统电动力主要由触头的HOLM力和导体的洛伦兹力组成。在冲击电流试验中,触头是否因电动力作用而斥开是考核电能表用磁保持继电器安全性和稳定性的重要标准。首先通过有限元法结构分析,计算动静触头的接触半径,再通过耦合场分析计算接触系统各部件的电流密度分布和磁场分布,进而求解出电动力。对不同触头压力和不同短路电流下的电动斥力进行了计算与分析,并研究了接触系统各部件对电动力的影响,为接触系统的改进提供基础。
The electric repulsion force of relay consists of Holm force on the contacts and Lorentz force on the conduc- tors. The safety and the stability of magnetic latching relay should be confirmed by the experiment in which the contacts should not be open by the repulsion force caused by the impulse current. In this paper, finite element structural analysis are used to calculate the contact radius of the relay, and then, the current density and magnetic field distribution in the various parts of the relay are calculated by the coupling field analysis to solve the electric repulsion force. Finally, the pa- per calculates and analyses the repulsion force in different contact pressure and short-circuit current, as well as the affects of different parts of contact system on the repulsion force. The study will provide the foundation for the improvement of the contact system of the relay.
出处
《电气开关》
2013年第4期18-21,24,共5页
Electric Switchgear
关键词
磁保持继电器
电动力
接触半径
有限元分析
magnetic latching relay, electric repulsion force, contact radius, finite element analysis ,
