High Step-up SEPIC Converters Based on a Family of Coat Circuit  

作　　者：Binxin Zhu Yu Huang Yao Zhang Guanghui Liu Shihuan Chen 

机构地区：[1]the College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China

出　　处：《CSEE Journal of Power and Energy Systems》2023年第5期1753-1764,共12页中国电机工程学会电力与能源系统学报(英文)

基　　金：supported in part by the National Natural Science Foundation of China(51707103);in part by Guangxi Key Research and Development Program(2022AB05028).

摘　　要：A family of coat circuits for SEPIC converters to improve their boost capability is presented.The present coat circuit does not contain any active switches,so the voltage conversion ratio of the presented converters can be enhanced without complicating its gate driver and control circuits.Meanwhile,because of the expansibility of the coat circuit,the number of its basic cells can be adjusted regarding the actual application requirements.Moreover,in comparison with a conventional SEPIC converter,voltage stress on power switch and diodes of the presented topology is lower at the same output voltage,and thus semiconductor components with low on-resistance are chosen to improve conversion efficiency of converter.The operational principle and steady state analysis of the SEPIC converter with one of the proposed coat circuits have been discussed in detail,and a 300W laboratory prototype is implemented to prove the theoretical analysis of presented converter.

关 键 词：Coat circuit high voltage gain low voltage stress SEPIC converter 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM46