一种双变压器结构的多谐振型软开关直流变换器

doi:10.19595/j.cnki.1000-6753.tces.180055

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Abstract ：A dual transformer-structured multi-resonant soft-switching DC-DC converter is proposed in this paper. Through the introduction of high-frequency transformers into the resonant tank, the converter obtains several resonant points including a unique resonant zero point. By properly configuring the resonance point position, the converter is able to transmit the 1st and the 3rd harmonic active power simultaneously in a wide frequency range. Thus, it contributes to the improved utilization rate of the resonant current and the reduced reactive circulation in the resonant tank. Moreover, inherent over-current protection is also obtained for the converter thanks to the adoption of the resonant zero point. Besides, the converter achieves the excellent turn-on zero-voltage switching (ZVS) for all the power switching devices in the primary side. Meanwhile, all the diodes in the secondary side realize the turn-on zero-current switching (ZCS) and turn-off zero-current quasi-soft-switching (Q-ZCS). Therefore, high conversion efficiency is assured due to the switching loss restricted effectively. To verify the feasibility of the proposed converter and the rationality of parameter design method, a 330W prototype is built in the laboratory. The maximum efficiency is 94.7% for experimental tests.

Key words： Dual transformer multi-resonant tank the utilization rate of resonant current resonant zero point transfer efficiency

Received: 15 January 2018 Published: 01 March 2019

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TM46

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	Articles by authors
	Wang Yifeng
	Han Fuqiang
	Yang Liang
	Chen Bo
	Lin Song

Cite this article:

Wang Yifeng,Han Fuqiang,Yang Liang等. A Dual Transformer-Structured Multi-Resonant Soft-Switching DC-DC Converter[J]. Transactions of China Electrotechnical Society, 2019, 34(4): 738-746.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180055 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I4/738

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