Abstract：Due to the wide-range applications and soft switching characteristic, bidirectional LLC resonant converters are becoming popular in the fields of electric vehicles, solar power system, power electronic transformers. A better topology of bidirectional LLC resonant converter is first analyzed in this paper. The topology has symmetrical structure in forward mode and backward mode operations, which can realize bidirectional power flow. The operation principle and soft switching characteristic of the topology under pulse-frequency-modulation (PFM) control or phase-shift (PS) control are then analysed in detail, and a new control method combined PFM with PS is proposed. Compared with single PFM control, pulse frequency modulation-phase shift (PFM-PS) control realizes wide voltage gain and full-range soft switching, thereby improving converter efficiency. Finally, feasibility and superiority of PFM-PS control are verified by PSIM simulation and the prototype experiment.
陶文栋, 王玉斌, 张丰一, 曲增彬, 潘腾腾. 双向LLC谐振变换器的变频-移相控制方法[J]. 电工技术学报, 2018, 33(24): 5856-5863.
Tao Wendong, Wang Yubin, Zhang Fengyi, Qu Zengbin, Pan Tengteng. Pulse Frequency Modulation and Phase Shift Combined Control Method for Bidirectional LLC Resonant Converter. Transactions of China Electrotechnical Society, 2018, 33(24): 5856-5863.
[1] Azizi I, Radjeai H.A bidirectional DC-DC converter fed DC motor for electric vehicle application[C]// IEEE International Conference on Electrical Engin- eering, Boumerdes, 2016: 1-5. [2] Patel A.A new bidirectional DC-DC converter for fuel cell, solar cell and battery systems[C]//IEEE Applied Power Electronics Conference and Expo- sition, Long Beach, CA, 2016: 150-155. [3] 武琳, 刘志刚, 洪祥. 隔离式双向全桥DC-DC变换器的功率控制特性比较与分析[J]. 电工技术学报, 2013, 28(10): 179-187.Wu Lin, Liu Zhigang, Hong Xiang. Comparison and analysis of power control characteristic for isolated bidirectional full-bridge DC-DC converter[J]. Transa- ctions of China Electrotechnical Society, 2013, 28(10): 179-187. [4] 张晓峰, 吕征宇. 混合动力车用全数字电流控制型双向DC/DC变换器[J]. 电工技术学报, 2009, 24(8): 84-89.Zhang Xiaofeng, Lü Zhengyu. Digital current controlled bi-directional DC/DC converter in the hybrid electric vehicle[J]. Transactions of China Electrotechnical Society, 2009, 24(8): 84-89. [5] Dusmez S, Khaligh A, Hasanzadeh A.A zero- voltage-transition bidirectional DC/DC converter[J]. IEEE Transactions on Industrial Electronics, 2015, 62(5): 3152-3162. [6] Kim M, Rosekeit M, Sul S K, et al.A dual- phase-shift control strategy for dual-active-bridge DC-DC converter in wide voltage range[C]//IEEE International Conference on Power Electronics and Ecce Asia, Jeju, 2011: 364-371. [7] 马棡, 瞿文龙, 刘圆圆. 一种新型双向软开关DC/ DC变换器及其软开关条件[J]. 电工技术学报, 2006, 21(7): 15-19.Ma Gang, Qu Wenlong, Liu Yuanyuan. A novel soft switching bidirectional DC/DC converter and its ZVS condition[J]. Transactions of China Electrotechnical Society, 2006, 21(7): 15-19. [8] Li Xiaodong, Bhat A K S. Analysis and design of high- frequency isolated dual-bridge series resonant DC/DC converter[J]. IEEE Transactions on Power Electronics, 2010, 25(4): 850-862. [9] Li Yuewei, Xing Yan, Lu Yangjun, et al.Perfor- mance analysis of a current-fed bidirectional LLC resonant converter[C]//IEEE Industrial Electronics Society, IECON 2016-Conference of the IEEE, Florence, 2016: 2486-2491. [10] Jiang Tianyang, Chen Xiliang, Zhang Junming, et al.Bidirectional LLC resonant converter for energy storage applications[C]//IEEE Applied Power Elec- tronics Conference and Exposition, Long Beach, 2013: 1145-1151. [11] Jiang Tianyang, Zhang Junming, Wu Xinke, et al.A bidirectional LLC resonant converter with auto- matic forward and backward mode transition[J]. IEEE Transactions on Power Electronics, 2014, 30(2): 757-770. [12] Jung J H, Kim H S, Ryu M H, et al.Design methodology of bidirectional CLLC resonant con- verter for high-frequency isolation of DC distribution systems[J]. IEEE Transactions on Power Electronics, 2012, 28(4): 1741-1755. [13] Liu Chaohui, Wang Jiabin, Colombage K, et al.A CLLC resonant converter based bidirectional EV charger with maximum efficiency tracking[C]//IET International Conference on Power Electronics, Machines and Drives, Glasgow, 2016: 1-6. [14] Fang Xiang, Hu Haibing, Shen Z J, et al.Operation mode analysis and peak gain approximation of the LLC resonant converter[J]. IEEE Transactions on Power Electronics, 2012, 27(4): 1985-1995. [15] 胡海兵, 王万宝, 孙文进, 等. LLC谐振变换器效率优化设计[J]. 中国电机工程学报, 2013, 33(18): 48-56.Hu Haibing, Wang Wanbao, Sun Wenjing, et al. Optimal efficiency design of LLC resonant con- verters[J]. Proceedings of the CSEE, 2013, 33(18): 48-56. [16] 杨子靖, 王聪, 辛甜, 等. 双向全桥LLC谐振变换器的理论分析与仿真[J]. 电源学报, 2012, 10(3): 48-51.Yang Zijing, Wang Cong, Xin Tian, et al. Theoretical analysis and simulation of the bidirectional LLC resonant DC/DC converter[J]. Journal of Power Supply, 2012, 10(3): 48-51. [17] De Simone S, Adragna C, Spini C, et al.Design- oriented steady-state analysis of LLC resonant converters based on FHA[C]//IEEE International Symposium on Power Electronics, Electrical Drives, Automation and Motion, Taormina, 2006: 200-207. [18] Kim J H, Kim C E, Kim J K, et al.Analysis on load-adaptive phase-shift control for high efficiency full-bridge LLC resonant converter under light-load conditions[J]. IEEE Transactions on Power Elec- tronics, 2016, 31(7): 4942-4955. [19] 李菊, 阮新波. 全桥LLC谐振变换器的混合式控制策略[J]. 电工技术学报, 2013, 28(4): 72-79.Li Ju, Ruan Xinbo. Hybrid control strategy of full bridge LLC converter[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 72-79.
2018, Vol. 33 
