基于同步PWM控制的双向CLLLC谐振型直流变换器运行特性分析

doi:10.19595/j.cnki.1000-6753.tces.L80470

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Abstract Aiming at the bidirectional DC-DC converter which is required for achieving electrical isolation, energy bidirectional transmission in DC distribution network, a bidirectional CLLLC resonant converter with synchronous PWM control strategy is proposed in this paper. In this way, the proposed converter is simple in structure with good soft-switching characteristics. The control scheme is easy to implement, otherwise, compared to other bidirectional resonant converter with variable frequency control, it has the same operating characteristics no matter the direction of power flow and can change the direction of power flow automatically and smoothly between forward mode and backward mode. In this paper, the principle of proposed converter is presented, Besides, based on equivalent circuit, the characteristics of power transmission and soft-switching ability are analyzed in detail, which offers the guidance for resonant tank parameter design. Finally, the feasibility and effectiveness of the proposed converter are fully verified by the experimental results from a 1.65kW prototype based on GaN-HEMT with peak efficiency of 98.4%.

Key words： Synchronous PWM control strategy bidirectional CLLLC resonant converter GaN HEMT smooth transition

Received: 01 July 2018 Published: 02 January 2020

PACS:

TM46

Corresponding Authors: 国家重点研发计划(2018YFB0106300)和国家自然科学基金（51777084）资助项目

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	Li Shucheng
	Liu Bangyin
	Jiang Qing
	Duan Shanxu

Cite this article:

Li Shucheng,Liu Bangyin,Jiang Qing等. Performance Analysis of Bidirectional CLLLC Resonant Converter with Synchronous PWM Control Strategy[J]. Transactions of China Electrotechnical Society, 2019, 34(zk2): 543-552.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80470 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/Izk2/543

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