一种双CLT谐振软开关直流变换器设计与实现

doi:10.19595/j.cnki.1000-6753.tces.162026

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Abstract In this paper, a dual-CLT resonant soft-switching DC-DC converter is proposed. By the implementation of the dual-transformer structure, the voltage gain curve of the converter not only has two resonance frequency points, but also possesses a unique zero point, which extremely extends the output voltage range and ensures the output voltage adjustable within the range from zero to rated value. The converter guarantees the switches turn-on zero voltage switching (ZVS), and the diodes turn-on quasi zero current switching (Q-ZCS) and turn-off ZCS within full load range. From half load to rated load range, turn-off Q-ZCS characteristics for switches are achieved, while at light load, the turn-off losses diminish as well. Consequently, the switching losses are weakened efficiently. Besides, in the dual-CLT structure, the leakage inductors of the two transformers can be integrated into the resonant inductors, which relieves the side effects caused by leakage inductors. At last, a 1kW prototype is designed in this paper, and its maximum efficiency reaches 95.3%. The experiments also verify the reliability of the theoretical analysis.

Key words： Soft switching resonance transformer high efficiency DC-DC converter

Received: 31 December 2016 Published: 12 April 2018

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TM46

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	Yang Liang
	Wang Yifeng
	Chen Bo
	Qie Wei
	Zhong Xu

Cite this article:

Yang Liang,Wang Yifeng,Chen Bo等. The Design and Implementation of a Dual-CLT Resonant Soft-Switching DC-DC Converter[J]. Transactions of China Electrotechnical Society, 2018, 33(7): 1461-1471.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.162026 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I7/1461

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