【作者】 刘颖异； 陈德桂； 纽春萍； 季良；

【Author】 (Xi’an JiaoTong University,710049,Xi’an) Liu yingyi Chen degui Niu chunping Ji liang

【机构】 西安交通大学；

【摘要】 接触器的动态特性分析对于其优化设计非常重要,触头及铁心的振动弹跳直接影响接触器的寿命。该文针对一种新型带反馈的智能接触器,提出了2组周期性相互转换的方程组,耦合了电路、电磁场和可动部分摩擦的影响,并采用虚拟样机技术,研究其闭合的动态过程。提出结合触头接触电阻,对触头的弹跳情况进行仿真。最后,利用提出的方法,优化了不同电压下智能接触器脉宽调制(PWM)波的占空比,并采用仿真和实验2种方法验证了在该最优占空比下,智能接触器的弹跳时间较普通交流接触器大幅减少。更多还原

【Abstract】 In the optimum design of AC contactors,it is important to analyze the 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 the coupling of the electric circuit,electromagnetic field and mechanical system taking account of the influence of friction.And with virtual prototyping technology,the dynamic behavior of the contactor can be gotten.The paper introduces the contact resistance to investigate the bounce of the contact.Finally,the paper gives an optimum design to the duty ratio of the intelligent contactor’ pulse modulated wave(PWM)under different exciting,and proves,by experiment and simulation,that the bounce time of the intelligent contactor working in the optimized duty ratio is much less than that of the general AC contactors.更多还原