An H-ψ Formulation for the Three Dimensional Eddy Current Problem

It is a very challenging problem for the direct simulation of the three dimensional eddy currents in grain-oriented (GO) silicon steel laminations since the coating film is only several microns thick over each lamination and the magnetic permeability is nonlinear and anisotropic. In this paper, we studyan H-  formulation for the nonlinear eddy current problem.The existence and uniqueness are established for the approximate solution upon introducing proper gauge conditions.