零电压开关三电平Buck-Boost双向变换器

doi:10.19595/j.cnki.1000-6753.tces.161013

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Abstract A control scheme of achieving zero-voltage-switching (ZVS) for the non-isolated three-level Buck-Boost bidirectional converter is proposed is the paper. All switches can achieve ZVS in the whole load range without additional circuitry, thereby improving the power conversion efficiency. Furthermore, this scheme utilizes an out-phase control, which can double the inductor current frequency, decrease the inductor volume greatly and improve power density. Firstly, the operation principle of ZVS is analyzed. Secondly, the influence of the reverse current I_R on soft-switching during the dead-time interval is explained. Then, the expressions of dead-time and switching frequency are derived. Finally, an experiment prototype is built and tested in both Buck mode and Boost mode to verify the correctness and effectiveness of the proposed scheme.

Key words： Bidirectional converter zero-voltage switching inductor current frequency doubling reverse current

Received: 06 July 2016 Published: 31 January 2018

PACS:

TM46

Fund:国家自然科学基金（ 51077112 ）和河北省自然科学基金（E2015203407,13211907D-2）资助项目

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	Sun Xiaofeng
	Yuan Ye
	Wang Baocheng
	Li Xin
	Pan Yao

Cite this article:

Sun Xiaofeng,Yuan Ye,Wang Baocheng等. Zero-Voltage Switching Three-Level Buck-Boost Bidirectional Converter[J]. Transactions of China Electrotechnical Society, 2018, 33(2): 293-300.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.161013 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I2/293

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