Dynamic Modeling of Magnetic Core Materials for Sub-MHz Range using Cauer Circuit

In this study, the frequency response of nanocrystalline soft magnetic materials for sinusoidal and pulse inputs in the sub-MHz range was simulated using a combination of a play model and the Cauer circuit. The resistance and static hysteretic properties of the inductors in the circuit were determined from B-H loop measurements at two frequencies. For the convenience of parameter identification, several analytical solutions of the eddy current field were introduced and compared. The proposed model could accurately represent the loss for the sub-MHz range.