Title :
Numerical analysis of axial magnetic field acting on the arc in vacuum circuit breakers by 3-D finite element method taking into account eddy currents
Author :
Kawase, Yoshihiro ; Inoue, Hiroalu ; Ota, Tomohiro ; Ito, Shokichi
Author_Institution :
Dept. of Electron. & Comput. Eng., Gifu Univ., Japan
fDate :
9/1/1998 12:00:00 AM
Abstract :
It is necessary for the optimum design of vacuum circuit breakers with axial magnetic field electrodes to analyze the residual magnetic field between the contacts in vacuum chambers at the instant when the arc current becomes zero. The residual magnetic field is generated by the eddy currents flowing in the electrodes. In this paper, the residual magnetic field is obtained by using a 3-D finite element analysis taking into account eddy currents. It is shown that the eddy currents are greatly influenced by the configuration of the electrodes, for example the number of slits in the contacts
Keywords :
eddy currents; finite element analysis; magnetic fields; vacuum circuit breakers; 3D finite element method; axial magnetic field; contact slits; eddy currents; residual magnetic field; vacuum chambers; vacuum circuit breakers; Circuit breakers; Coils; Conductivity; Electrodes; Fault currents; Ignition; Magnetic analysis; Magnetic fields; Numerical analysis; Vacuum arcs;
Journal_Title :
Magnetics, IEEE Transactions on
