Performance Optimization of Interleaved Boost Based on Coupled Inductors
Wang Yifeng1, Wang Zhongjie1, Chen Bo1, Wang Hao2, Chen Qing3
1. Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin 300072 China; 2. Tianjin Key Laboratory of Electrical and Electronic Technology Tiangong University Tianjin 300387 China; 3. State Grid Jiangsu Electric Power Co. Ltd Nanjing 211000 China
Abstract This paper focuses on the comprehensive optimization of the steady-state and dynamic performance of the interleaved Boost converter. By using reverse-coupled inductors instead of traditional discrete inductors and taking advantage of their different equivalent inductances in different time intervals of a switching cycle, the steady-state and dynamic performance of the converter can be improved at the same time. Under high- frequency operating conditions, the use of reverse-coupled inductors can further reduce inductor losses and improve converter efficiency. This paper takes two-channel interleaved Boost converter as an example. First, the equivalent inductance of the coupled inductor is theoretically derived, and then the steady-state and dynamic performance of the converter is theoretically analyzed. The advantage of reverse-coupled inductors in improving the steady-state and dynamic performance of the converter is pointed out. Finally, combined with GaN FETs, an experimental prototype with a switching frequency of 500kHz and a rated power of 500W was built, and compared with the interleaved Boost converter using discrete inductors. The experimental results prove that the use of coupled inductors can improve the steady-state and dynamic performance of the converter, which verifies the correctness of the theoretical analysis in this paper.
Wang Yifeng,Wang Zhongjie,Chen Bo等. Performance Optimization of Interleaved Boost Based on Coupled Inductors[J]. Transactions of China Electrotechnical Society, 2022, 37(8): 2097-2106.
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2022, Vol. 37 
