Transactions of China Electrotechnical Society  2019, Vol. 34 Issue (zk2): 543-552    DOI: 10.19595/j.cnki.1000-6753.tces.L80470
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Performance Analysis of Bidirectional CLLLC Resonant Converter with Synchronous PWM Control Strategy
Li Shucheng, Liu Bangyin, Jiang Qing, Duan Shanxu
State Key Laboratory of Electromagnetic Engineering and New Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China

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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 wordsSynchronous 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
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Jiang Qing
Duan Shanxu
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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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