Validation of the Eddy-Current Energy Losses in The Gyrator-Capacitor Model of Nanocrystalline Soft Magnetic Core

Abstract

The paper presents the results of validating the gyrator-capacitor model of frequency dependence characteristic of an inductive core made of Fe_73.5Cu₁Nb₃Si_15.5B₇ nanocrystalline alloy. The model, focused on eddy current losses, was implemented using the LTSpice software. Experimental results confirmed that a relatively simple description of eddy current losses enables effective modeling of the magnetic hysteresis loop for the driving frequencies up to 36 kHz. Very good agreement of modeling and experimental results was confirmed quantitatively by the R² coefficient exceeding 0.995. Moreover, results indicate that further research should consider the more detailed functional models of the frequency dependence of the coercive field.