基于混合控制式交错并联LLC谐振变换器的充电模块研制
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摘要
为了解决当前电动汽车充电模块效率低、功率小的缺点,提出了一种基于混合控制式交错并联LLC谐振技术的非车载式电动汽车充电模块整体设计方案。所述方案输入侧为VIENNA电路,输出侧为交错并联LLC谐振DC/DC变换器。采用交错并联技术减小输出电流纹波,提高充电模块输出功率的同时,采用移相变频混合控制策略,使得谐振变换器工作在较窄的频率范围之内,因此降低了磁性元器件设计难度,提高了充电模块的转换效率以及功率密度。给出了充电模块整体电路拓扑设计、各模块工作原理以及控制策略,研制了20kW原理样机,与纯变频式交错并联LLC谐振变换器充电模块的对比分析验证了所述方法的可行性。
In order to improve the efficiency of the charging module of electric vehicles,an overall design scheme for off-board charge based on hybrid control interleaving technique in the paralleling DC/DC converter is designed.In this scheme,VIENNA circuit is at the input side and the hybrid control interleaving parallel LLC resonant converter is at the output side.While reducing the output current ripple and improving the output power of charging module with interleaving paralleled technique,the hybrid control strategy of frequency changing phase shift is used to make the resonant converter work in a narrow range of frequencies to reduce the difficulty in magnetic element design,and improve power density and conversion efficiency.The overall topology design of the charging module,working principle of every module,and control strategy are given.A 20 kW prototype is developed,and the feasibility of the proposed method is verified by comparing with the charging module of pure interleaving paralleled LLC converter.
In order to improve the efficiency of the charging module of electric vehicles,an overall design scheme for off-board charge based on hybrid control interleaving technique in the paralleling DC/DC converter is designed.In this scheme,VIENNA circuit is at the input side and the hybrid control interleaving parallel LLC resonant converter is at the output side.While reducing the output current ripple and improving the output power of charging module with interleaving paralleled technique,the hybrid control strategy of frequency changing phase shift is used to make the resonant converter work in a narrow range of frequencies to reduce the difficulty in magnetic element design,and improve power density and conversion efficiency.The overall topology design of the charging module,working principle of every module,and control strategy are given.A 20 kW prototype is developed,and the feasibility of the proposed method is verified by comparing with the charging module of pure interleaving paralleled LLC converter.
引文
[1]陈良亮,张蓓蓓,周斌,等.电动汽车非车载充电模块的研制[J].电力系统自动化,2011,35(7):81-85.CHEN Liangliang,ZHANG Beibei,ZHOU Bin,et al.Development of charging module of off-board charger for electric vehicle[J].Automation of Electric Power Systems,2011,35(7):81-85.
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[11]陈铁涵,韦徵,王赟程,等.交错并联移相全桥全负载状态静态特性研究与优化设计[J].电工技术学报,2014,29(10):49-56.CHEN Tiehan,WEI Hui,WANG Bingcheng,et al.Interleaving paralleled phase shift full bridge converter full load range static characteristics research and optimal design[J].Transactions of China Electrotechnical Society,2014,29(10):49-56.
[12]刘和平,陈红岩,苗秩如,等.混合式LLC电路谐振与同步整流数字式控制[J].中国电机工程学报,2015,35(9):2273-2278.LIU Heping,CHEN Yanhong,MIAO Zhiru,et al.Hybrid LLC circuit resonant and synchronous rectifier digital control[J].Proceedings of the CSEE,2015,35(9):2273-2278.
[13]李菊,阮新波.全桥LLC谐振变化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 converters[J].Transactions of China Electrotechnical Society,2013,28(4):72-79.
[14]JIN Ke,SUN Yi,XU Ming,et al.Integrated magnetic self driven ZVS non isolated full-bridge converter[J].IEEE Trans on Industrial Electronics,2010,57(5):1615-1623.
[15]ZHANG Junming,LIAO Jiawen,WANG Jianfeng.An current-driving synchronous rectifier for an LLC resonant converter with voltage-double rectifier structure[J].IEEE Trans on Power Electronics,2012,27(4):1894-1905.
[2]LIU Hong,ZENG Pingliang,GUO Jianyi,et al.An optimization strategy of controlled electric vehicle charging considering demand side response and regional wind and photovoltaic[J].Journal of Modern Power Systems and Clean Energy,2015,3(2):232-239.
[3]冯倩.变频双移相控制的全桥三电平LLC变换器的研究[D].广州:广东工业大学,2015.
[4]WU Xinke,HUA Guichao,ZHANG Junming,et al.A new current-driven synchronous rectifier for series parallel resonant(LLC)DC-DC converter[J].IEEE Trans on Power Electronics,2011,58(1):289-297.
[5]刘芳霆,王永攀,朱忠尼,等.两路交错并联DC/DC变化器软开关自适应控制策略研究[J].电力电子,2013,30(3):6-11.LIU Fangting,WANG Yongpan,ZHU Zhongni,et al.Research on adaptive control strategy for ZVS of double interleaving DC/DC converter[J].Power Electric,2013,30(3):6-11.
[6]刘伟丽,柴玉华.LLC谐振变换器交错并联技术研究[J].电源技术,2012,36(1):133-135.LIU Weili,CHAI Yuhua.Research of interleaving LLC resonant converter[J].Power Sources Technology,2012,36(1):133-135.
[7]LEE J Y,JEONG Y S,HAN B M.An isolated DC/DC converter using high-frequency unregulated LLC resonant converter for fuel cell applications[J].IEEE Trans on Industrial Electronics,2011,58(7):2926-2934.
[8]孙孝峰,申颜峰,朱云娥.一种Boost型宽电压范围输入LLC谐振变换器[J].中国电机工程学报,2015,35(3):3895-3903.SUN Xiaofeng,SHEN Yangfeng,ZHU Yune.An boost integrated LLC resonant converter for wide input voltage range[J].Proceedings of the CSEE,2015,35(3):3895-3903.
[9]毕超,肖飞,陈明.交错并联技术在并联DC-DC变换器纹波抑制中的分析与应用[J].电气自动化,2013,35(4):37-40.BI Chao,XIAO Fei,CHEN Ming.Analysis and application of interleaving technique in paralleling DC/DC converter with ripple suppression[J].Electrical Automation,2013,35(4):37-40.
[10]FIGGE H,GROTE T,SCHFMET F,et al.Two-phase interleaving configuration of the LLC resonant converteranalysis and experimental evaluation[C]//39th Annual Conference of the IEEE Industrial Electronics Society,November 10-13,2013,Vienna,Austria:1392-1397.
[11]陈铁涵,韦徵,王赟程,等.交错并联移相全桥全负载状态静态特性研究与优化设计[J].电工技术学报,2014,29(10):49-56.CHEN Tiehan,WEI Hui,WANG Bingcheng,et al.Interleaving paralleled phase shift full bridge converter full load range static characteristics research and optimal design[J].Transactions of China Electrotechnical Society,2014,29(10):49-56.
[12]刘和平,陈红岩,苗秩如,等.混合式LLC电路谐振与同步整流数字式控制[J].中国电机工程学报,2015,35(9):2273-2278.LIU Heping,CHEN Yanhong,MIAO Zhiru,et al.Hybrid LLC circuit resonant and synchronous rectifier digital control[J].Proceedings of the CSEE,2015,35(9):2273-2278.
[13]李菊,阮新波.全桥LLC谐振变化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 converters[J].Transactions of China Electrotechnical Society,2013,28(4):72-79.
[14]JIN Ke,SUN Yi,XU Ming,et al.Integrated magnetic self driven ZVS non isolated full-bridge converter[J].IEEE Trans on Industrial Electronics,2010,57(5):1615-1623.
[15]ZHANG Junming,LIAO Jiawen,WANG Jianfeng.An current-driving synchronous rectifier for an LLC resonant converter with voltage-double rectifier structure[J].IEEE Trans on Power Electronics,2012,27(4):1894-1905.