Eddy Current Modeling with Order-Reduction in Magnetic Equivalent Circuits

High fidelity magnetic equivalent circuits are considered as a compromise between detailed finite element models and simplified magnetic equivalent circuits. A very detailed magnetic equivalent circuit is set forth that avoid conventional geometrical simplifications. A long R-L ladder structure in magnetic domain justifies uniform flux density distribution. The proposed model accurately grasps the high frequency dynamics, corner effect, and 3-D effects. The resulted high-order model is rigorously simplified using linear model- order reduction techniques while preserving essential dynamic characteristics. The resulted reduced-order model is verified with the original full-order model in both time- and frequency- domains.