电工技术学报  2016, Vol. 31 Issue (14): 156-164    DOI:
电力电子 |
高升压增益软开关DC-DC变换器
周翔, 许建平, 陈章勇
西南交通大学磁浮技术与磁浮列车教育部重点实验室 成都 610031
Soft-Switched DC-DC Converter with High Voltage Gain
Zhou Xiang, Xu Jianping, Chen Zhangyong
Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle Ministry of EducationSouthwest Jiaotong University Chengdu 610031 China
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摘要 在软开关Boost变换器基础上,通过引入Flyback单元,提出了一种高升压增益软开关DC-DC变换器,进一步提高了变换器的电压增益,避免了高占空比,减小了开关管电压应力。因此,可选取低电压等级低导通电阻MOSFET以降低变换器的成本,提高变换器的效率。在开关管关断期间,漏感能量向负载传递,有效利用了漏感能量,且无需额外的吸收电路。此外,变换器实现了开关管的零电压(ZVS)导通和二极管的零电流(ZCS)关断,进而消除了开关管的开通损耗和二极管的反向恢复损耗。研究了高升压增益软开关DC-DC变换器电路的工作特性和占空比丢失的主要原因,分析了该变换器的元器件应力及电路损耗。设计了一台160W的实验样机,实验结果验证了理论分析的正确性。
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周翔
许建平
陈章勇
关键词 Boost-Flyback变换器高增益软开关耦合变压器DC-DC变换器    
Abstract:Based on soft-switched boost converter, a soft-switched DC-DC converter with high voltage gain is proposed by introducing a Flyback-cell with coupled inductor. The proposed converter achieves high voltage gain, reduces switch stress, and recycles the energy stored in the transformer leakage inductor. Thus the proposed converter improves the efficiency of converter and reduces the cost by using low voltage stress MOSFET. Zero voltage switch (ZVS) turn-on of switches and the zero current switch (ZCS) turn-off of diodes are achieved, which improve the efficiency of the converter. The operating characteristics of converter, the duty ratio loss of converter, and the stress of switching devices are analyzed in this paper. Experimental results of a 160W prototype verify the analysis results of the proposed converter.
Key wordsBoost-Flyback converter    high gain    soft-switching    coupled transformer    DC-DC converter   
收稿日期: 2014-06-30      出版日期: 2016-07-28
PACS: TM46  
基金资助:国家自然科学基金资助项目(51177140、61371033)
作者简介: 周 翔 男 1991年生,博士研究生,主要研究方向为高增益变换器的软开关技术。E-mail: pecel_zhouxiang@163.com
引用本文:   
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. Soft-Switched DC-DC Converter with High Voltage Gain. Transactions of China Electrotechnical Society, 2016, 31(14): 156-164.
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