The arc generated by breaking the main circuit exacerbates the ablation of the contact, which affects the life of the contactor seriously. By controlling the breaking time of the contactor and making contact break in the optimum time zone are the effective ways to weaken the arc. In this article, the contact movement characteristic is concerned directly in order to control the contact breaking time. A back-to-back double-E alternating current contactor is proposed, and its structural parameters are optimized by particle swarm optimization algorithm. The mathematical model of circuit and magnetic is established. A closed-loop control system based on velocity feedback is proposed. The simulation results show that the designed contactor and the proposed control method are correct, and the actual velocity curve of the contact is consistent with the planned motion curve. It can realize zero-crossing breaking of the main circuit to achieve the effect of no-arc breaking.

中文翻译：

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背靠背双E型交流接触器分断时间控制

主电路断路产生的电弧加剧了触头的烧蚀，严重影响了接触器的寿命。通过控制接触器的分断时间，使触点在最佳时区分断，是减弱电弧的有效途径。本文直接关注触点运动特性，以控制触点断开时间。提出了一种背靠背双E交流接触器，其结构参数通过粒子群优化算法进行优化。建立了电路和磁性的数学模型。提出了一种基于速度反馈的闭环控制系统。仿真结果表明，所设计的接触器和所提出的控制方法是正确的，接触的实际速度曲线与规划的运动曲线一致。可实现主回路过零分断，达到无电弧分断的效果。