The Calculation Method of Nanocrystalline Core Loss Under Non-Sinusoidal Excitation and Experimental Verification
Sun He1,2, Li Yongjian1,2, Liu Huan1,2, Wan Zhenyu1,2
1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China; 2. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology Tianjin 300130 China
Abstract：In order to improve the calculation accuracy of core loss in power electronic devices under complex excitation, two core loss calculation methods under rectangular waveform with DC bias excitation (non-sinusoidal excitation for short) were proposed in this paper. Firstly, the Rectangular Extension of Steinmetz Equation (RESE) was modified, and the corresponding expressions were derived. Secondly, considering the nonlinearity of equivalent conductivity ρ under non-sinusoidal excitation, the core loss separation method was further modified. Then, based on the hysteresis loop measurement system, the core loss of Hitachi nanocrystalline core (FT-3KS) under sinusoidal and non-sinusoidal excitations was measured in the range of 20kHz. By fitting the curves of the core loss, the analytical expressions of the above two methods were acquired. Finally, the above methods were verified by the comparison between the measured values and the model predictions. The average prediction error of the two methods is controlled within 10%.
孙鹤, 李永建, 刘欢, 万振宇. 非正弦激励下纳米晶铁心损耗的计算方法与实验验证[J]. 电工技术学报, 2022, 37(4): 827-836.
Sun He, Li Yongjian, Liu Huan, Wan Zhenyu. The Calculation Method of Nanocrystalline Core Loss Under Non-Sinusoidal Excitation and Experimental Verification. Transactions of China Electrotechnical Society, 2022, 37(4): 827-836.
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