Abstract
The phenomena in the electromagnetic field intrinsically spread over the infinite space. The purpose of this paper is to provide a useful method for numerical calculation of the electromagnetic field with open boundary.
The finite element method (FEM) and the boundary element method (BEM), which have entirely different features from each other, are useful for numerical analysis. This paper describes the hybrid finite element and boundary element method for the three-dimensional eddy current problems. The physical quantities we want to obtain finally are the eddy current density in the conductive region and the magnetic flux density in the free space. Therefore, in the hybrid method we adopt the electric field intensity E and the magnetic field intensity H directly as unknowns. The conductive region is analyzed by the FEM adopting E, on the other hand, the free space with a supply current by BEM using H. In this paper we also describe the appropriate boundary element discretization using edge elements, which is suitable for combining the FE region with the BE region.
To verify this approach some numerical results obtained by the proposed method are compared with measured ones.
