A Practical Core Loss Model for Filter Inductors of Power Electronic Converters

• Published in: IEEE journal of emerging and selected topics in power electronics 2018-03, Vol.6 (1), p.29-39
• Main Authors: Matsumori, Hiroaki, Shimizu, Toshihisa, Wang, Xiongfei, Blaabjerg, Frede
• Format: Article
• Language: English
• Subjects: Converter; Core loss; eddy current loss; hysteresis loss; inductor; Inductors; Loss measurement; Magnetic cores; Magnetic flux; Mathematical model; Power electronics
• ISSN: 2168-6777; 2168-6785
• DOI: 10.1109/JESTPE.2017.2761127

This paper proposes a core loss model for filter inductors of power electronic converters. The model allows a computationally efficient analysis on the core loss of the inductor under the square voltage excitation and the premagnetization condition. First, the core loss of the filter inductor under buck chopper excitation is evaluated with the proposed model and compared with the conventional methods. The comparison shows that the proposed method results in a better core loss prediction under the premagnetized condition than that of conventional alternatives. Then, the core loss of the filter inductor with the pulsewidth modulated inverter excitation is evaluated, which shows that the proposed model not only accurately predicts the core loss but also identifies the hysteresis loss part. These results demonstrate that the approach can further be used for the development of magnetic materials for power electronic applications.