一种双变压器结构的多谐振型软开关直流变换器
|
摘要
提出一种双变压器结构的多谐振型软开关直流变换器。通过在谐振腔内引入辅助高频变压器,变换器获得了包含谐振零点在内的多个谐振频率点。通过合理配置谐振点位置,变换器可在较宽频率范围内保证基波和3次谐波有功功率的同时传递,提高谐振电流利用率并起到抑制无功环流的作用。同时,谐振零点的引入使得变换器具备固有的限流保护能力。此外,变换器能够在全负载范围内实现开关管的零电压开通、二极管的零电流开通和准零电流关断,减小了开关损耗。最后,为了验证所提拓扑的有效性和参数设计方法的合理性,搭建一台额定功率330W的样机进行实验验证,最高效率可达到94.7%。
A dual transformer-structured multi-resonant soft-switching DC-DC converter is proposed in this paper. Through the introduction of high-frequency transformers into the resonant tank,the converter obtains several resonant points including a unique resonant zero point. By properly configuring the resonance point position, the converter is able to transmit the 1 st and the 3 rd harmonic active power simultaneously in a wide frequency range. Thus, it contributes to the improved utilization rate of the resonant current and the reduced reactive circulation in the resonant tank. Moreover,inherent over-current protection is also obtained for the converter thanks to the adoption of the resonant zero point. Besides, the converter achieves the excellent turn-on zero-voltage switching(ZVS) for all the power switching devices in the primary side. Meanwhile, all the diodes in the secondary side realize the turn-on zero-current switching(ZCS) and turn-off zero-current quasi-soft-switching(Q-ZCS). Therefore, high conversion efficiency is assured due to the switching loss restricted effectively. To verify the feasibility of the proposed converter and the rationality of parameter design method, a 330 W prototype is built in the laboratory. The maximum efficiency is 94.7% for experimental tests.
A dual transformer-structured multi-resonant soft-switching DC-DC converter is proposed in this paper. Through the introduction of high-frequency transformers into the resonant tank,the converter obtains several resonant points including a unique resonant zero point. By properly configuring the resonance point position, the converter is able to transmit the 1 st and the 3 rd harmonic active power simultaneously in a wide frequency range. Thus, it contributes to the improved utilization rate of the resonant current and the reduced reactive circulation in the resonant tank. Moreover,inherent over-current protection is also obtained for the converter thanks to the adoption of the resonant zero point. Besides, the converter achieves the excellent turn-on zero-voltage switching(ZVS) for all the power switching devices in the primary side. Meanwhile, all the diodes in the secondary side realize the turn-on zero-current switching(ZCS) and turn-off zero-current quasi-soft-switching(Q-ZCS). Therefore, high conversion efficiency is assured due to the switching loss restricted effectively. To verify the feasibility of the proposed converter and the rationality of parameter design method, a 330 W prototype is built in the laboratory. The maximum efficiency is 94.7% for experimental tests.
引文
[1]Wang Fei,Duarte J L,Hendrix M A M.Gridinterfacing converter systems with enhanced voltage quality for micro grid application-concept and implementation[J].IEEE Transactions on Power Electronics,2011,26(12):3501-3513.
[2]吴卫民,何远彬,耿攀,等.直流微网研究中的关键技术[J].电工技术学报,2012,27(1):98-107.Wu Weimin,He Yuanbin,Geng Pan,et al.Key technologies for DC micro-grids[J].Transactions of China Electrotechnical Society,2012,27(1):98-107.
[3]陈武,吴小刚,蒋玮,等.一种适用于新能源并网的谐振升压变换器[J].电工技术学报,2016,31(8):27-33.Chen Wu,Wu Xiaogang,Jiang Wei,et al.A step-up resonant converter for grid-connected renewable energy sources[J].Transactions of China Electrotechnical Society,2016,31(8):27-33.
[4]Ho-Sung Kim,Myung-Hyo Ryu,Ju-Won Baek,et al.High-efficiency isolated bidirectional AC-DCconverter for a DC distribution system[J].IEEETransactions on Power Electronics,2013,28(4):1642-1654.
[5]Peng Fangzheng,Li Hui,Su Guijia,et al.A new ZVSbidirectional DC-DC converter for fuel cell and battery application[J].IEEE Transactions on Power Electronics,2004,19(1):54-65.
[6]刘闯,刘艳鹏,刘海洋,等.高频隔离型电动汽车快速直流充电器研究[J].电工技术学报,2016,31(3):40-49.Liu Chuang,Liu Yanpeng,Liu Haiyang,et al.Quick DC charger for high-frequency isolation electric vehicles[J].Transactions of China Electrotechnical Society,2016,31(3):40-49.
[7]Zhang Zhe,Ouyang Ziwei,Thomsen O C,et al.Analysis and design of a bidirectional isolated DC-DC converter for fuel cells and supercapacitors hybrid system[J].IEEE Transactions on Power Electronics,2012,27(2):848-859.
[8]Tan N M L,Abe T,Akagi H.Design and performance of a bidirectional isolated DC-DC converter for a battery energy storage system[J].IEEE Transactions on Power Electronics,2012,27(3):1237-1248.
[9]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,LüZhengyu.Digital current controlled bi-directional DC/DC converter in the hybrid electric vehicle[J].Transactions of China Electrotechnical Society,2009,24(8):84-89.
[10]Jiang Tianyang,Zhang Junming,Wu Xinke,et al.Abidirectional LLC resonant converter with automatic forward and backward mode transition[J].IEEETransactions on Power Electronics,2015,30(2):757-770.
[11]Jiang Tianyang,Zhang Junming,Wu Xinke,et al.Abidirectional three-level LLC resonant converter with PWAM control[J].IEEE Transactions on Power Electronics,2016,31(3):2213-2225.
[12]吕正,颜湘武,孙磊.基于变频-移相混合控制的L-LLC谐振双向DC-DC变换器[J].电工技术学报,2017,32(4):12-24.LüZheng,Yan Xiangwu,Sun Lei.A L-LLC resonant bidirectional DC-DC converter based on hybrid control of variable frequency and phase shift[J].Transactions of China Electrotechnical Society,2017,32(4):12-24.
[13]王暄,王广柱,孙晓伟,等.具有宽范围输出电压的三电平半桥LLC谐振变换器控制策略[J].电工技术学报,2017,32(21):24-33.Wang Xuan,Wang Guangzhu,Sun Xiaowei,et al.Research on control strategy of three-level halfbridge LLC resonant converter with wide output voltage range[J].Transactions of China Electrotechnical Society,2017,32(21):24-33.
[14]Hai-Nam Vu,Woojin Choi.A novel dual full-bridge LLC resonant converter for CC and CV charges of batteries for electric vehicles[J].IEEE Transactions on Industrial Electronics,2018,65(3):2212-2225.
[15]李浩昱,李振伟,赵雷,等.宽输入LLC谐振变换器多电平控制策略[J].电工技术学报,2017,32(4):48-57.Li Haoyu,Li Zhenwei,Zhao Lei,et al.Multi-level control strategy of wide input LLC resonant converter[J].Transactions of China Electrotechnical Society,2017,32(4):48-57.
[16]Xie Xiaogao,Zhang Junming,Zhao Chen,et al.Analysis and optimization of LLC resonant converter with a novel over-current protection circuit[J].IEEETransactions on Power Electronics,2007,22(2):435-443.
[17]Chao Fei,Fred C Lee,Qiang Li.Digital implementation of soft start-up and short-circuit protection for high-frequency LLC converters with optimal trajectory control(OTC)[J].IEEE Transactions on Power Electronics,2017,32(10):8008-8017.
[18]Zhao Bin,Wang Gang,William Gerard Hurley.Analysis and performance of LCLC resonant converters for high-voltage high-frequency applications[J].IEEE Journal of Emerging and Selected Topics in Power Electronics,2017,5(3):1272-1286.
[19]Christopher M B,Yong Ann Ang,Martin P Foster,et al.Analysis and control of dual-output LCLC resonant converters with significant leakage inductance[J].IEEE Transactions on Power Electronics,2008,23(4):1724-1732.
[20]Wang Yijie,Guan Yueshi,Xu Dianguo,et al.ACLCL resonant DC/DC converter for two-stage LEDdriver system[J].IEEE Transactions on Industrial Electronics,2016,63(5):2883-2891.
[21]Lu Fei,Zhang Hua,Heath Hofman,et al.A doublesided LCLC-compensated capacitive power transfer system for electric vehicle charging[J].IEEETransactions on Power Electronics,2015,30(11):6011-6014.
[22]Wu Hongfei,Jin Xiang,Xing Yan.Multielement resonant converters with a notch filter on secondary side[J].IEEE Transactions on Power Electronics,2016,31(6):3999-4004.
[23]Chen Wei,Rong Ping,LüZhengyu.Snubberless bidirectional DC-DC converter with new CLLCresonant tank featuring minimized switching loss[J].IEEE Transactions on Industrial Electronics,2010,57(9):3075-3086.
[24]Navid Shafiei,Majid P,Hosein F,et al.Analysis and implementation of a fixed-frequency LCLC resonant converter with capacitive output filter[J].IEEETransactions on Industrial Electronics,2011,58(10):4773-4782.
[2]吴卫民,何远彬,耿攀,等.直流微网研究中的关键技术[J].电工技术学报,2012,27(1):98-107.Wu Weimin,He Yuanbin,Geng Pan,et al.Key technologies for DC micro-grids[J].Transactions of China Electrotechnical Society,2012,27(1):98-107.
[3]陈武,吴小刚,蒋玮,等.一种适用于新能源并网的谐振升压变换器[J].电工技术学报,2016,31(8):27-33.Chen Wu,Wu Xiaogang,Jiang Wei,et al.A step-up resonant converter for grid-connected renewable energy sources[J].Transactions of China Electrotechnical Society,2016,31(8):27-33.
[4]Ho-Sung Kim,Myung-Hyo Ryu,Ju-Won Baek,et al.High-efficiency isolated bidirectional AC-DCconverter for a DC distribution system[J].IEEETransactions on Power Electronics,2013,28(4):1642-1654.
[5]Peng Fangzheng,Li Hui,Su Guijia,et al.A new ZVSbidirectional DC-DC converter for fuel cell and battery application[J].IEEE Transactions on Power Electronics,2004,19(1):54-65.
[6]刘闯,刘艳鹏,刘海洋,等.高频隔离型电动汽车快速直流充电器研究[J].电工技术学报,2016,31(3):40-49.Liu Chuang,Liu Yanpeng,Liu Haiyang,et al.Quick DC charger for high-frequency isolation electric vehicles[J].Transactions of China Electrotechnical Society,2016,31(3):40-49.
[7]Zhang Zhe,Ouyang Ziwei,Thomsen O C,et al.Analysis and design of a bidirectional isolated DC-DC converter for fuel cells and supercapacitors hybrid system[J].IEEE Transactions on Power Electronics,2012,27(2):848-859.
[8]Tan N M L,Abe T,Akagi H.Design and performance of a bidirectional isolated DC-DC converter for a battery energy storage system[J].IEEE Transactions on Power Electronics,2012,27(3):1237-1248.
[9]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,LüZhengyu.Digital current controlled bi-directional DC/DC converter in the hybrid electric vehicle[J].Transactions of China Electrotechnical Society,2009,24(8):84-89.
[10]Jiang Tianyang,Zhang Junming,Wu Xinke,et al.Abidirectional LLC resonant converter with automatic forward and backward mode transition[J].IEEETransactions on Power Electronics,2015,30(2):757-770.
[11]Jiang Tianyang,Zhang Junming,Wu Xinke,et al.Abidirectional three-level LLC resonant converter with PWAM control[J].IEEE Transactions on Power Electronics,2016,31(3):2213-2225.
[12]吕正,颜湘武,孙磊.基于变频-移相混合控制的L-LLC谐振双向DC-DC变换器[J].电工技术学报,2017,32(4):12-24.LüZheng,Yan Xiangwu,Sun Lei.A L-LLC resonant bidirectional DC-DC converter based on hybrid control of variable frequency and phase shift[J].Transactions of China Electrotechnical Society,2017,32(4):12-24.
[13]王暄,王广柱,孙晓伟,等.具有宽范围输出电压的三电平半桥LLC谐振变换器控制策略[J].电工技术学报,2017,32(21):24-33.Wang Xuan,Wang Guangzhu,Sun Xiaowei,et al.Research on control strategy of three-level halfbridge LLC resonant converter with wide output voltage range[J].Transactions of China Electrotechnical Society,2017,32(21):24-33.
[14]Hai-Nam Vu,Woojin Choi.A novel dual full-bridge LLC resonant converter for CC and CV charges of batteries for electric vehicles[J].IEEE Transactions on Industrial Electronics,2018,65(3):2212-2225.
[15]李浩昱,李振伟,赵雷,等.宽输入LLC谐振变换器多电平控制策略[J].电工技术学报,2017,32(4):48-57.Li Haoyu,Li Zhenwei,Zhao Lei,et al.Multi-level control strategy of wide input LLC resonant converter[J].Transactions of China Electrotechnical Society,2017,32(4):48-57.
[16]Xie Xiaogao,Zhang Junming,Zhao Chen,et al.Analysis and optimization of LLC resonant converter with a novel over-current protection circuit[J].IEEETransactions on Power Electronics,2007,22(2):435-443.
[17]Chao Fei,Fred C Lee,Qiang Li.Digital implementation of soft start-up and short-circuit protection for high-frequency LLC converters with optimal trajectory control(OTC)[J].IEEE Transactions on Power Electronics,2017,32(10):8008-8017.
[18]Zhao Bin,Wang Gang,William Gerard Hurley.Analysis and performance of LCLC resonant converters for high-voltage high-frequency applications[J].IEEE Journal of Emerging and Selected Topics in Power Electronics,2017,5(3):1272-1286.
[19]Christopher M B,Yong Ann Ang,Martin P Foster,et al.Analysis and control of dual-output LCLC resonant converters with significant leakage inductance[J].IEEE Transactions on Power Electronics,2008,23(4):1724-1732.
[20]Wang Yijie,Guan Yueshi,Xu Dianguo,et al.ACLCL resonant DC/DC converter for two-stage LEDdriver system[J].IEEE Transactions on Industrial Electronics,2016,63(5):2883-2891.
[21]Lu Fei,Zhang Hua,Heath Hofman,et al.A doublesided LCLC-compensated capacitive power transfer system for electric vehicle charging[J].IEEETransactions on Power Electronics,2015,30(11):6011-6014.
[22]Wu Hongfei,Jin Xiang,Xing Yan.Multielement resonant converters with a notch filter on secondary side[J].IEEE Transactions on Power Electronics,2016,31(6):3999-4004.
[23]Chen Wei,Rong Ping,LüZhengyu.Snubberless bidirectional DC-DC converter with new CLLCresonant tank featuring minimized switching loss[J].IEEE Transactions on Industrial Electronics,2010,57(9):3075-3086.
[24]Navid Shafiei,Majid P,Hosein F,et al.Analysis and implementation of a fixed-frequency LCLC resonant converter with capacitive output filter[J].IEEETransactions on Industrial Electronics,2011,58(10):4773-4782.