一种隔离型三端口双向LCLC多谐振直流变换器

doi:10.19595/j.cnki.1000-6753.tces.170559

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Abstract In this paper, an isolated multi-resonant bidirectional DC-DC converter is proposed. The LCLC resonant tank has three resonant frequencies, by parameters design, the three resonant frequencies are two series resonant frequencies of fundamental and third order and a second order parallel resonant frequency. The resonant tank can transfer the energy of fundamental and third order frequencies to increase efficiency of the converter. The resonant current is a superposition of the fundamental and third harmonics, which effectively reduces its peak value. Power transfer is managed by controlling the phase shift angles among three ports. By adjusting the driving frequency under different load conditions, zero voltage switching (ZVS) of all the switches in three ports is guaranteed. Therefore, lower switching loss and high efficiency are achieved in full load range. Besides, in the proposed structure, leakage inductors of transformer are integrated into the resonant inductors, weakening the adverse effects of leakage inductors. At last, a 1.5kW prototype is built to verify the reliability and feasibility of the proposed topology. The maximum efficiency in the forward and reverse operating conditions is 96.7% and 96.9% respectively. When the power is above 0.5kW, the bidirectional efficiency is higher than 95.5%, which improves that the proposed converter has high efficiency in the whole load range.

Key words： Three-port multi-resonant soft switching bidirectional DC-DC converter

Received: 05 May 2017 Published: 27 July 2018

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TM46

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	Li Wei
	Wang Yifeng
	Han Fuqiang
	Chen Bo

Cite this article:

Li Wei,Wang Yifeng,Han Fuqiang等. An Isolated Three-Port Bidirectional LCLC Multi-Resonant DC-DC Converter[J]. Transactions of China Electrotechnical Society, 2018, 33(14): 3231-3244.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170559 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I14/3231

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