MODELING OF ELECTROMAGNETIC FORCE WITH A MAGNETIC VECTOR POTENTIAL FORMULATION VIA A SUBPROBLEM FINITE ELEMENT METHOD

Abstract

The aim of this study is  based on a subproblem finite element method with a magnetic vector potential formulation to anaylize electromagnetic forces due to the distribution of leakge magnetic flux densities  in air gaps and electric current denisities in coils that are somewhat difficult to apply directly a finite element method as some studied conducting regions are very small in comparison with overall of the whole studied domain. The method is herein presented for coupling problems in several steps: A problem invloved with simplified models (stranded inductors) is first solved. The next problem consisting of one or two conductive regions can be added to improve errors from previous subproblems. All the steps are independently solve with different meshes and geometries, which facilitates meshing and reduces calculation time for each subproblem.