After the field equations and the continuous conditions beteen the interfaces for 3-D eddy current problems under various gauges were discussed, it was pointed out in this paper that using the vector magnetic potential A, electric scalar potential φ and Coulomb gauge A=0 in eddy current regions and using magnetic scalar potential Ω in the nonconducting regions are more suitable. All field equations, the boundary conditions, the continuous conditions between the interfaces and the corresponding variational principle corresponding with this method are also given.
Proc.Conf.on the computation of Electromagnetic Fields(Graz.Austria,Aug.25~28,1987),also IEEE Trans.Mag.,24(1)(1988),13-578.
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