Simulation and analysis on dynamic characteristics of permanent magnetic contactor with current feedback

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Abstract

It is important to analyze dynamic behaviors for the optimum design of AC contactors. Based upon a kind of intelligent permanent magnetic (PM) contactor with current-feedback system, this paper presented a method to obtain the dynamic characteristics of the contactor, and constructed a set of multi-field equations with the state coupled with feedback current signals, the peak value of internal toothed wave, and outputs of several comparators in the circuit. The experimental results proved the correctness of the method. Then, the influence of the hardware's parameters on the performance of the control system was analyzed with this method; and the design criterion was given to these parameters based on the analysis results. The experiments prove that the intelligent permanent contactor with optimal parameters can reduce the contact bounce and save the energy.

Original languageEnglish
Pages (from-to)118-124
Number of pages7
JournalZhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
Volume30
Issue number15
StatePublished - 25 May 2010

Keywords

  • Current-feedback system
  • Dynamic characteristics
  • Intelligent permanent contactor
  • Multi-field equations set

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