一种高增益软开关Boost-Forward变换器

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Abstract A high gain soft-switching Boost-Forward converter is proposed in this paper.The voltage gain of the proposed converter is improved by introducing a coupled inductor.The rate of change of the turn-off voltage and the turn-off losses of the switches are greatly reduced by their parallel capacitors.Meanwhile,the switches can operat under zero-voltage turn-on condition by optimizing the dead time between their driving signals.The reverse-recovery problem of the diode is solved by the reasonable design of the leakage inductance.Furthermore,the efficiency of the converter can be improved further by choosing low-voltage rated switches because the voltage stresses of the switches are much lower than the output voltage.Additionally,the utilization rate of the coupled inductor is improved because the coupled inductor transfers energy in both switches’ ON state and OFF state.Finally,a prototype is built and the experimental results verified the theoretical analysis.

Key words： High gain coupled inductor zero voltage switching low voltage stress

Received: 19 November 2014 Published: 25 May 2015

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TM46

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	Zhang Yang
	Luo Quanming
	Gao Wei
	Sun Pengju
	Zhou Luowei

Cite this article:

Zhang Yang,Luo Quanming,Gao Wei等. A High Gain Soft-switching Boost-Forward Converter[J]. Transactions of China Electrotechnical Society, 2015, 30(7): 80-87.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I7/80

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