Analysis and Simulation of Dynamic Behavior and Contact Bounce for an Intelligent Contactor With Feedback Mechanism
Analysis and Simulation of Dynamic Behavior and Contact Bounce for an Intelligent Contactor With Feedback Mechanism
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发表时间：
2007
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通讯作者：
Ji Liang
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作者：
Ji Liang
在交流接触器的优化设计中，对其动态特性进行分析是非常重要的。动触头和铁心跳动对接触器的寿命有显著影响。针对一种新型的带反馈机构的智能接触器，建立了两组不同的周期性相互转换方程。该方程描述了电路、电磁场和机械系统的耦合，考虑了摩擦力的影响。并利用虚拟样机技术，得到了接触器的动态特性。本文引入接触电阻来研究触头的弹跳。最后，对智能接触器在不同激励下的脉宽调制（PWM）占空比进行了优化设计，并通过实验和仿真证明，在优化占空比下智能接触器的跳变时间远小于普通交流接触器。
In optimum design of AC contactors,it is important to analyze its dynamic behavior. Moreover,movable contact and core bounces have remarkable effect on the lifetime of contactors. According to a new kind of intelligent contactor with feedback mechanism,this paper builds two different sets of periodically inter-transferred equations. The equations describe coupling of electric circuit,electromagnetic field and mechanical system taking account of the influence of friction. And with virtual prototyping technology,dynamic behavior of the contactor can be gotten. The paper introduces contact resistance to investigate the bounce of contact. Finally,the paper gives an optimum design to the duty ratio of intelligent contactor’ pulse modulated wave (PWM) under different exciting,and proves,by experiment and simulation,that the bounce time of intelligent contactor working in optimized duty ratio is much less than that of general AC contactors.