Abstract：The symmetry half-bridge bidirectional converter’s zero voltage switching (ZVS) is achieved by the resonance between the circuit’s parasitic elements, including parasitic capacitors of the switches and the leak inductance of the transformer. In application, the additional resonance elements could help the ZVS operation if the parasitic elements are not enough. The topology and operation principle of symmetry half-bridge bidirectional converter is briefly introduced, which could easily achieve zero voltage switching (ZVS). Based on the analysis of its operation modes, the realization of ZVS is indicated. By analyzing the equivalent circuit of the ZVS operation mode, the relationship between the circuit’s resonance elements’ parameters and the converter’s steady operation requirements is built, which could be used to choose the switch’s parasitic capacitors and the additional resonance elements. The experimental results verify the illustrated conditions.
[1] Peng Z, Hui L, GuiJia S, et al. A new ZVS bidirectional DC-DC converter for fuel cell and battery application[J]. IEEE Transactions on Power Electronics, 2004, 19(1): 54-65. [2] 马学军. 数字移相控制隔离型半桥双向DC-DC变换器研究[D]. 武汉: 华中科技大学, 2005. [3] 马, 瞿文龙. 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): 16-19. Ma Gang, Qu Wenlong. A novel soft switching bidirectional DC-DC converter and its ZVS condition[J]. Transactions of China Electrotechnical Society, 2006, 21(7): 16-19. [4] Xiao Huafeng, Xie Shaojun. A ZVS bidirectional DC-DC converter with phase-shift plus PWM control scheme[J]. IEEE Transactions on Power Electronics, 2008, 32(2): 813-823. [5] Bhajana, V, Reddy R. A novel ZVS-ZCS bidirectional DC-DC converter for fuel cell and battery application[C]. Proceedings of the IEEE Power Electronics Specialist Conference, 2009: 12-17. [6] Lenke U, Hu Jiefang, De Doncker W. Unified steady-state description of phase-shift-controlled ZVS-operated series-resonant and non-resonant single-active-bridge converters[C]. Proceedings of the IEEE Energy Conversion Congress and Exposition, 2009: 796-803. [7] Han S, Shin Y, ChangSeop K. A pulse frequency modulated full bridge DC-DC converter with series boost capacitor[J]. IEEE Transactions on Industrial Electronics, 2011, 99(3): 1～8. [8] Kim E, Kwon B. Zero-voltage and zero-current switching full-bridge converter with secondary resonance[J]. IEEE Transactions on Industrial Electronics, 2010, 57(3): 1017-1025. [9] Liu F, Yan J, Ruan X. Zero-voltage and zero- current-switching PWM combined three-level DC-DC converter[J]. IEEE Transactions on Industrial Electronics, 2010, 57(5): 1644-1654. [10] Qiao Chongming, Keyue S. An isolated full bridge boost converter with active soft switching[C]. Proceedings of the IEEE Power Electronics Specialist Conference, 2004: 896-903. [11] 胡红林, 李春华, 邵波. 移相全桥零电压PWM软开关电路的研究[J]. 电力电子技术, 2009, 43(1): 12-14. Hu Honglin, Li Chunhua, Shao Bo. Reseach on phase shifted full-bridge ZVS converter[J]. Power Electronics, 2009, 43(1): 12-14. [12] 陈仲, 张鑫, 季飚, 等. 一种基于变压器串联和新型辅助网络的ZVS移相全桥变换器[J]. 电工技术学报, 2009, 24(12): 95-100. Chen Zhong, Zhang Xin, Ji Biao, et al. A ZVS phase-shifted full-bridge converter with series- connection of transformer and auxiliary network[J]. Transactions of China Electrotechnical Society, 2009, 24(12): 95-100. [13] 袁进行, 马瑞卿, 樊平. 带辅助谐振的移相全桥ZVS DC-DC变换器研究[J]. 电力电子技术, 2008, 42(5): 23-25. Yuan jinxing, Ma Ruiqing, Fan Ping. Research on phase-shifted full-bridge ZVS DC-DC converter with auxiliary branch[J]. Power Electronics, 2008, 42(5): 23-25. [14] Jeon SeongJeub, Cho GyuHyeong. A zero-voltage and zero-current switching full bridge DC-DC converter with transformer isolation[J]. IEEE Transactions on Power Electronics, 2001, 16(5): 573-580. [15] Khairy F, Lee Hyun Woo, Tomokaze M, et al. Boost-half bridge single power stage PWM DC-DC converter for small scale fuel cell stack[C]. Proceedings of the IEEE International Conference on Power and Energy, 2006: 426-431. [16] Mao Hong, AbuQahouq J, Luo Shiguo, et al. Zero- voltage-switching half-bridge DC-DC converter with modified PWM control method[J]. IEEE Transactions on Power Electronics, 2004, 19(4): 947-958. [17] Chung H, Cheung Wai Leung, Tang S. A ZCS bidirectional flyback DC-DC converter[J]. IEEE Transactions on Power Electronics, 2004, 19(11): 1426-1434. [18] 徐德鸿, 马皓, 汪槱生. 电力电子技术[M]. 北京: 科学出版社, 2006. [19] 姜雪松. 隔离升压全桥 DC-DC 变换器拓扑理论和控制技术研究[D]. 北京: 中科院电工所, 2006.
2011, Vol. 26 
