A Boundary Integral Formulation for Eddy Current Problems Based on the Cell Method

A finite formulation for 3-D eddy current problems in unbounded domains is presented. This approach is based on the discrete magnetic vector potential to model conducting regions and on the magnetic scalar potential to model free space. In order to avoid meshing of the air region, integral boundary conditions coupling Dirichlet and Neumann data are used. A numerical strategy based on the Schur complement approach is used in order to improve the convergence properties of the iterative solver. Simulation results show that the proposed approach is both fast and accurate.