Extraction of dynamic, low-order models for magnetic devices based on finite element analysis with hysteresis

This paper presents a method to extract low-order, dynamic models for magnetic devices based on finite element analysis (FEA) modeling with hysteresis. Hysteresis introduces more complexity and higher computational cost in time domain simulation. The proposed method extracts low-order, dynamic models without compromising assumptions that sacrifice accuracy or utility, and yields both good local and global properties. Also, a new model order reduction (MOR) procedure is proposed to select and store the linearized systems according to the multiple-valued hysteresis characteristic. The resulting low-order models are simulated much more easily. This work provides a foundation for more automated analysis of complicated magnetic devices, such as multi-phase coupled inductors, actuators, and machines.