谐振软开关耦合电感高增益DC-DC变换器

doi:10.19595/j.cnki.1000-6753.tces.171105

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Abstract ：A soft-switched high step-up converter with coupled inductor is proposed in this paper. By replacing the output diode of conventional Boost converter with an active switch, zero-voltage-switched turn-on of power switches and zero-current-switched turn-off of diodes can be achieved, which reduce switching loss and alleviate reverse-recovery problem of diodes. Owing to the output-series of three units, the proposed converter can achieve high voltage gain without extreme high duty cycle and high voltage stress. Thus low-voltage-rated MOSFETs can be utilized to improve the efficiency. By designing the resonance between the leakage inductor of coupled inductor and multi-voltage capacitor, the current of switches can be decreased when they are turned off, which can reduce switching loss. The steady-state operating characteristics and the requirement of the ZVS of the proposed converter are analyzed in detail. Experimental results of a 160W prototype verify the theoretical analysis.

Key words： Soft-switched high step-up voltage gain coupled inductor resonance

Received: 27 July 2017 Published: 01 March 2019

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TM46

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	Lin Xuefeng
	Xu Jianping
	Zhou Xiang

Cite this article:

Lin Xuefeng,Xu Jianping,Zhou Xiang. Soft-Switched High Step-Up DC-DC Converter with Coupled Inductor of Resonance[J]. Transactions of China Electrotechnical Society, 2019, 34(4): 747-755.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171105 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I4/747

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