Numerical analysis of electromagnetic forces in low voltage AC circuit breakers using 3-D finite element method taking into account eddy currents

Author

Ito, Shokichi ; Takato, Yoshiaki ; Kawase, Yoshihiro ; Ota, Tomohiro

Author_Institution

Dept. of Electron., Fukuoka Inst. of Technol., Japan

Volume

34

Issue

5

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

2597

Lastpage

2600

Abstract

It is necessary for the optimum design of low voltage circuit breakers to analyze electromagnetic forces acting on the contact systems when the circuit breakers interrupt fault currents. In this paper, the forces which are known as the magnetic blowout force acting on the arc and the electromagnetic repulsion force acting on the moving contact arm are obtained by using the 3-D finite element analysis taking into account eddy currents. It is shown that our 3-D analysis is capable of evaluating a new design of contact systems in low voltage ac switching devices

Keywords

circuit breakers; eddy currents; electromagnetic forces; finite element analysis; 3D finite element method; arc; contact design; eddy current; electromagnetic force; electromagnetic repulsion force; fault current interruption; low voltage AC circuit breaker; magnetic blowout force; numerical analysis; switching device; Circuit analysis; Circuit breakers; Eddy currents; Electromagnetic analysis; Electromagnetic forces; Fault currents; Finite element methods; Low voltage; Magnetic analysis; Numerical analysis;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.717600

Filename

717600