Steady state eddy current analysis in multiply-excited magnetic systems with arbitrary terminal conditions

A novel finite-element formulation is presented for the classical steady-state eddy-current problem in multiply excited magnetic systems with arbitrary terminal conditions. The formulation consists of obtaining the magnetic vector potential, the electric field, and the total measurable currents in a magnetic circuit that is coupled with a lumped electrical circuit, given the terminal voltage. The algorithm presented preserves the symmetry of the resulting matrix. This procedure provides an efficient one-step solution technique for solving eddy-current problems in conductors with specific terminal voltages and external impedances. An example illustrates the procedure