Comprehensive SPICE Model for Inductors Considering Magnetic Losses Under DC Bias Current

This study presents a SPICE model that accurately represents magnetic loss under DC current conditions in inductors. The proposed circuit enhances the accuracy of frequency response and loss characteristics by introducing a parameter dependent on DC current and a resonance circuit to consider parasitic capacitance. This methodology was validated using a power inductor, revealing precise inductor loss analysis. Additionally, the inductor loss evaluation is compared with the results from a method based on the improved Generalized Steinmetz Equation.