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Adaptive estimation method for determining inductor core losses in the medium frequency range using time response analysis

Chojowski Maciej, Sosnowski Robert, Baszyński Marcin, Stobiecki Andrzej, Dudek Roman, Dziadecki Aleksander, Konstantinou Charalambos

Archives of Electrical Engineering

2025

Vol. 74, nr 2

375--389

This paper presents a novel approach for measuring losses in magnetic components intended for medium-frequency power electronic applications. The proposed method enables accurate determination of core losses in power inductors using only voltage and current measurements. Real inductors, consisting of a copper litz winding and low-loss core, are used to test the effectiveness of the method across multiple operating points. The estimation method is able to match the losses with 6.13% accuracy, showing that it is sufficient with only voltage and current measurements, and is efficient in estimating the losses with low overhead.