Three dimensional eddy currents using a four component finite element formulation

A method to solve general three dimensional eddy currents is presented. A four component formulation is used. The unknowns are the three components of magnetic vector potential A, and the scalar electric potential φ. A discussion of the role of the scalar potential in insuring the continuity of the eddy currents is included. The method is formulated using eight noded brick finite elements. Several examples are given which illustrate the validity of the formulation.