Homogenization Method Based on Model Order Reduction for FE Analysis of Multi-Turn Coils

This paper presents a homogenization method based on the model order reduction (MOR) for finite element (FE) analysis of multi-turn coils. The multi-turn coils are replaced by a homogenous material with the complex permeability that is expressed by a rational polynomial of frequency. After the MOR process, the complex permeability can readily be computed at any frequency. It is shown that the present method can drastically reduce the computational time without loss of accuracy.