谐振软开关耦合电感高增益DC-DC变换器
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摘要
提出一种谐振软开关耦合电感高增益DC-DC变换器,通过引入辅助网络,将Boost变换器的输出二极管替换为开关管,实现全部开关管的零电压导通(ZVS)和二极管的零电流关断(ZCS),并降低开关管的开关损耗,消除二极管的反向恢复问题。同时,变换器输出端为三个输出单元串联,提高变换器的电压增益,避免变换器工作于极限占空比,在实现高升压增益的同时降低开关管电压应力。因此可选取低电压等级、低导通电阻的MOSFET,以提高变换器效率。倍压电容与耦合电感的漏感谐振,可减小开关管关断时刻电流,降低开关损耗,进一步提高变换器效率。研究变换器的工作原理和工作特性,分析开关管ZVS条件。设计制作一台160W的实验样机,实验结果验证了理论分析的正确性。
A soft-switched high step-up converter with coupled inductor is proposed in this paper.By replacing the output diode of conventional Boost converter with an active switch,zero-voltage-switched turn-on of power switches and zero-current-switched turn-off of diodes can be achieved, which reduce switching loss and alleviate reverse-recovery problem of diodes. Owing to the output-series of three units, the proposed converter can achieve high voltage gain without extreme high duty cycle and high voltage stress. Thus low-voltage-rated MOSFETs can be utilized to improve the efficiency. By designing the resonance between the leakage inductor of coupled inductor and multi-voltage capacitor, the current of switches can be decreased when they are turned off, which can reduce switching loss. The steady-state operating characteristics and the requirement of the ZVS of the proposed converter are analyzed in detail. Experimental results of a 160 W prototype verify the theoretical analysis.
A soft-switched high step-up converter with coupled inductor is proposed in this paper.By replacing the output diode of conventional Boost converter with an active switch,zero-voltage-switched turn-on of power switches and zero-current-switched turn-off of diodes can be achieved, which reduce switching loss and alleviate reverse-recovery problem of diodes. Owing to the output-series of three units, the proposed converter can achieve high voltage gain without extreme high duty cycle and high voltage stress. Thus low-voltage-rated MOSFETs can be utilized to improve the efficiency. By designing the resonance between the leakage inductor of coupled inductor and multi-voltage capacitor, the current of switches can be decreased when they are turned off, which can reduce switching loss. The steady-state operating characteristics and the requirement of the ZVS of the proposed converter are analyzed in detail. Experimental results of a 160 W prototype verify the theoretical analysis.
引文
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[14]Li Wuhua,Li Weichen,He Xiangning,et al.General derivation law of nonisolated high-step-up interleaved converters with built-in transformer[J].IEEETransactions on Industrial Electronics,2012,59(3):1650-1661.
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[16]Liang T J,Tseng K C.Analysis of integrated BoostFlyback step-up converter[J].IEE Proceedings of Electric Power Applications,2005,152(2):217-225.
[17]Tseng K C,Liang T J.Novel high-efficiency step-up converter[J].IEE Proceedings of Electric Power Applications,2004,151(2):182-190.
[18]Park S,Choi S.Soft-switched CCM Boost converters with high voltage gain for high-power applications[J].IEEE Transactions on Power Electronics,2010,25(5):1211-1217.
[19]Park Y,Jung B,Choi S.Nonisolated ZVZCS resonant PWM DC-DC converter for high step-up and highpower applications[J].IEEE Transactions on Power Electronics,2012,27(8):3568-3575.
[20]Kwon M,Oh S,Choi S.High gain soft-switching bidirectional DC-DC converter for eco-friendly vehicles[J].IEEE Transactions on Power Electronics,2014,29(4):1659-1666.
[2]田春光,田利,李德鑫,等.基于混合储能系统跟踪光伏发电输出功率的控制策略[J].电工技术学报,2016,31(14):75-83.Tian Chunguang,Tian Li,Li Dexin,et al.Control strategy for tracking the output power of photovoltaic power generation based on hybrid energy storage system[J].Transactions of China Electrotechnical Society,2016,31(14):75-83.
[3]Fardoun Abbas A,Ismail Esam H.Ultra step-up DC-DC converter with reduced switch[C]//IEEEInternational Conference on Sustainable Energy Technologies,Singapore,2008:425-430.
[4]Hsieh Y P,Chen J F,Liang T J P,et al.Novel high step-up DC-DC converter with coupled-inductor and switched-capacitor techniques for a sustainable energy system[J].IEEE Transactions on Industrial Electronics,2011,26(12):3481-3490.
[5]侯世英,陈剑飞,孙韬,等.基于开关电容网络的DC-DC变换器[J].电工技术学报,2014,29(10):90-97.Hou Shiying,Chen Jianfei,Sun Tao,et al.DC-DCconverters based on switched-capacitor network[J].Transactions of China Electrotechnical Society,2014,29(10):90-97.
[6]薛利坤,王萍,王议锋,等.基于开关电容和耦合电感的交错并联型高电压增益双向DC-DC变换器[J].电工技术学报,2016,31(24):181-187.Xue Likun,Wang Ping,Wang Yifeng,et al.Interleaved high gain bidirectional DC-DC converter with switched capacitor and coupled inductor[J].Transactions of China Electrotechnical Society,2016,31(24):181-187.
[7]Axelrod B,Berkovich Y,Ioinovici A.Switchedcapacitor/switched-inductor structures for getting transformerless hybrid DC-DC PWM converters[J].IEEE Transactions on Circuits&Systems,2008,55(2):687-696.
[8]Yang L S,Liang T J,Chen J F.Transformerless DC-DC converters with high step-up voltage gain[J].IEEE Transactions on Industrial Electronics,2009,56(8):3144-3152.
[9]Mantovanelli P,Barbi I.A new current-fed isolated PWM DC-DC converter[J].Applied Power Electronics Conference and Exposition,1995,11(3):431-438.
[10]陈章勇,许建平,吴建雪,等.基于LC吸收电路的耦合电感倍压单元高升压增益Boost变换器[J].电工技术学报,2016,31(2):78-85.Chen Zhangyong,Xu Jianping,Wu Jianxue,et al.High voltage gain Boost converter based on coupled-inductor voltage-doubler cell and LCsnubber circuit[J].Transactions of China Electrotechnical Society,2016,31(2):78-85.
[11]Kim H,Yoon C,Choi S.An improved current-fed ZVS isolated boost converter for fuel cell applications[J].IEEE Transactions on Power Electronics,2010,25(9):2357-2364.
[12]曹太强,刘威,郭筱瑛,等.双耦合电感二次型高升压增益DC-DC变换器[J].电工技术学报,2015,30(8):104-112.Cao Taiqiang,Liu Wei,Guo Xiaoying,et al.High voltage gain DC-DC converter based on twocoupled-inductor[J].Transactions of China Electrotechnical Society,2015,30(8):104-112.
[13]周翔,许建平,陈章勇.高升压增益软开关DC-DC变换器[J].电工技术学报,2016,31(14):156-164.Zhou Xiang,Xu Jianping,Chen Zhangyong.Softswitched DC-DC converter with high voltage gain[J].Transactions of China Electrotechnical Society,2016,31(14):156-164.
[14]Li Wuhua,Li Weichen,He Xiangning,et al.General derivation law of nonisolated high-step-up interleaved converters with built-in transformer[J].IEEETransactions on Industrial Electronics,2012,59(3):1650-1661.
[15]Lin B R,Dong J Y.New zero-voltage switching DC-DC converter for renewable energy conversion systems[J].IET Power Electronics,2012,5(4):393-400.
[16]Liang T J,Tseng K C.Analysis of integrated BoostFlyback step-up converter[J].IEE Proceedings of Electric Power Applications,2005,152(2):217-225.
[17]Tseng K C,Liang T J.Novel high-efficiency step-up converter[J].IEE Proceedings of Electric Power Applications,2004,151(2):182-190.
[18]Park S,Choi S.Soft-switched CCM Boost converters with high voltage gain for high-power applications[J].IEEE Transactions on Power Electronics,2010,25(5):1211-1217.
[19]Park Y,Jung B,Choi S.Nonisolated ZVZCS resonant PWM DC-DC converter for high step-up and highpower applications[J].IEEE Transactions on Power Electronics,2012,27(8):3568-3575.
[20]Kwon M,Oh S,Choi S.High gain soft-switching bidirectional DC-DC converter for eco-friendly vehicles[J].IEEE Transactions on Power Electronics,2014,29(4):1659-1666.