摘要
为了提高复杂激励下电力电子装置中铁心损耗的计算精度,该文提出两种用于计算矩形波叠加直流偏置激励(即非正弦激励)下铁心损耗的计算方法。首先,修正延伸到矩形波激励计算的斯坦梅茨公式(RESE)以适应非正弦激励,并推导出相应的计算式。其次,考虑在非正弦激励下,等效电导率ρ的非线性,对铁耗分离法做进一步修正。然后,构建磁滞回线测试平台,在20kHz范围内对日立纳米晶铁心样品FT-3KS(Fe_(73.5)CuNd_(3)Si1_(3.5)B_(9))进行正弦及非正弦激励下损耗测试。对损耗测量结果进行数值拟合,得到各方法的解析计算式。最后,通过实测值与模型预测值对比分析,两种方法的平均预测误差控制在10%以内,验证了上述方法的有效性。
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 conductivityρunder 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-3 KS)under sinusoidal and non-sinusoidal excitations was measured in the range of 20 kHz.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%.
作者
孙鹤
李永建
刘欢
万振宇
Sun He;Li Yongjian;Liu Huan;Wan Zhenyu(State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin,300130 China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology Tianjin,300130 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2022年第4期827-836,共10页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51777055)
河北省百名优秀创新人才支持计划(SLRC2017031)
河北省杰出青年科学基金(E2018202284)资助项目。
关键词
铁心损耗
矩形波叠加直流偏置激励
修正RESE公式法
修正铁耗分离法
Core loss
rectangular waveform with DC bias excitation
modified RESE empirical formula method
modified core loss separation method
