Dynamic Characteristic Analysis and Optimization for the Energy-Saving and Bounce-Reducing Double-Coil Contactor

Degui CHEN  Yingyi LIU  Weixiong TONG  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E89-C   No.8   pp.1194-1200
Publication Date: 2006/08/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e89-c.8.1194
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from IS-EMD2005))
Category: Contactors & Circuit Breakers
Keyword: 
energy-saving and bouncing-reducing double-coil contactor,  dynamic characteristic,  optimum design,  

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Summary: 
In the optimum design of contactors, it is important to analyze the dynamic behaviors. In this paper, it proposes a new computational approach for analyzing dynamic characteristic of the energy-saving and bouncing-reducing double-coil contactor. According to the contactor's unique characteristic that it has two transferable coils, the paper builds two different sets of equations. One describes the period before the transfer position, and the other describes the period after the transfer position. The equations deal with the electrical circuit, electromagnetic field that can be calculated by using 3-D finite element method and mechanical system considering the influence of friction. The validity of the proposed method is confirmed by experiment. Finally, the paper gives an optimum design for the transfer position of the two coils. The result of the optimum design reduces both of the first and the second bounces of the movable contact.