Non-Linear Inductor Models Comparison for Switched-Mode Power Supplies Applications

The use of non-linear power inductors, intended as devices exploited up to a current at which the inductance is halved, great interest in switched-mode supplies (SMPSs). Indeed, it allows lighter and cheaper inductors improving density. On other hand, analysis SMPSs equipped with requires appropriate modeling inductor reproducing versus current. This paper compares two main analytical models proposed literature: former based on polynomial, latter exploits arctangent function reproduce non-linearity inductance. Performance compared by considering effort retrieving model’s parameters, evaluating profile characteristic equation inductor, exploiting simulate supply. Results are given both terms computation time accuracy reference experimental values, highlighting pros cons each model.