Abstract：Regarding the elaborate design of power electronic transformer (PET), it is essential to accurately predicate the copper losses and magnetic core losses of high-frequency transformers under non-sinusoidal voltage magnetization, and analyze its variation with operation modes. Based on the analysis of operation principle and approximate equivalent circuit model of the isolated bidirectional dual-active-bridge DC-DC converter (IBDC) in PET, an analytical calculation method for copper losses is proposed. The extended expressions of modified Steinmetz equation are presented to determinate the magnetic core losses under rectangular and trapezoidal voltage excitations that are typical for PET. The correction-coefficients are introduced accordingly, which are only correlative with duty cycle and rising time. Simulation and experimental results on a 1.2kV/0.3kV/5kV·A high-frequency transformer test model with amorphous alloy core verify the effectiveness of the above methods.
陈彬, 李琳, 赵志斌. 双向全桥DC-DC变换器中大容量高频变压器绕组与磁心损耗计算[J]. 电工技术学报, 2017, 32(22): 123-133.
Chen Bin, Li Lin, Zhao Zhibin. Calculation of High-Power High-Frequency Transformer's Copper Loss and Magnetic Core Loss in Dual-Active-Bridge DC-DC Converter. Transactions of China Electrotechnical Society, 2017, 32(22): 123-133.
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