Numerical modeling for 3D eddy current calculation in magneto-quasistatic approximation

Abstract

In general, magnetic excitation of eddy current density is calculated in a 3-dimensional system to gain the most accurate results leading to long computational times. However, the long computational time might be problematic due to needs for high computational effort. In order to improve this disadvantageous point, this paper deals with a finite-difference approximation considering the curl and divergence operator of eddy current density. In particular, by using this numerical modeling calculation, the proposed method in this paper can quickly implement the eddy current calculation in the 3-dimensional system and build the eddy currents modeling of a specific part of interest. Lastly, the comparative analysis with a commercial tool for 3-D FEM is carried out, and the accuracy of the 3 dimensional finite difference method (3-D FDM) is verified.