A New Potential-Based Finite Element Algorithm for Eddy-Current Problems

In this paper we investigate the potential-based finite element algorithms for eddy-current problems. In our models the source coil carries a pulse excitation current generating a transient field. As distinguished from the traditional coupled algorithm whose discrete equation system including both vector and scalar potential unknowns is solved at every time-step, a novel decoupled algorithm is presented here. Because the vector and scalar unknowns are calculated at two different equation systems respectively, it decreases the storage amount of non-zero entries of coefficient matrix and computational costs, and achieves the better results under the alike CPU time. Some computer simulation results of eddy-current densities for two eddy-current models (IEEJ model and TEAM Workshop Problem 7) are demonstrated to verify the feasibility and efficiency of our algorithm.