Hajime Igarashi, Shingo Hiruma, and Hayaho Sato, Graduate School of Hokkaido University E-mail: igarashi@ssi.ist.hokudai.ac.jp Recently, the development of high-speed devices using GaN and SiC has allowed magnetic devices such as power inductors and high-frequency transformers to be miniaturized. The rise in the operating frequency, however, increases the eddy current and hysteresis losses in the winding coils and soft magnetic composite widely used for magnetic cores. The computational cost of directly computing eddy currents in the coils and magnetic particles is large because of their fine structure. This paper reports a homogenization method that replaces small-structured material with homogenous material with complex permeability to allow for the fast analysis of those eddy currents. Moreover, this paper reports a method based on the homogenization method and model order reduction that makes it possible to perform an effective time-domain computation of eddy current effects in inductors and other magnetic devices.
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