MODELING OF MAGNETIC FIELDS AND EDDY CURRENT LOSSES IN ELECTROMAGNETIC SCREENS BY A SUBPROBLEM METHOD

Abstract

The aim of this paper is  based on a subproblem technique with the magnetic vector potential formulation to compute magnetic fields, eddy currents and Joule power losses in electromagnetic screens that are extreamly difficult to perform by a finite element method. The subproblem method is herein developed for coupling problems in two steps: A problem starting from simplified models with stranded inductors and thin screen models can be also first considered. Then a correction problem with the actual volume thin regions is added to correct inaccuracies from previous problem. All the steps are separately performed with different meshes and geometries, which facilitates meshing and speeding up the calculation of each problem.