Analysis and Research on Electro-Dynamic Repulsion Force Acting on the Paralleled Conductors in Air Circuit Breaker

Yingyi LIU
Degui CHEN
Xingwen LI

Publication
IEICE TRANSACTIONS on Electronics   Vol.E90-C    No.7    pp.1466-1471
Publication Date: 2007/07/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.7.1466
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from ICEC2006))
Category: Contactors & Circuit Breakers
Keyword: 
optimization design,  air circuit breaker,  3-D FEM,  electro-dynamic repulsion force,  

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Summary: 
For the optimization design of air circuit breaker (ACB), it is important and necessary to calculate the electro-dynamic repulsion force acting on the movable contact. A method based on 3-D FEM with the equations that describe the relationships among current, magnetic field and repulsion force, which takes the ferromagnet into account, is adopted to calculate the electro-dynamic repulsion force. The method enables one to analyze the factors that affect the electro-dynamic repulsion force, including the number of the movable conductor parallel branches as well as the location of the axis and the shape of the flexible connection. The discussion of the calculation results is also presented in this paper.