一种新型Buck-Boost变换器  

A New Buck-Boost Converter

作　　者：房绪鹏 綦中明 王晴晴 题晓东 FANG Xupeng;QI Zhongming;WANG Qingqing;TI Xiaodong(College of Electrical Engineering and Automation,Shandong University of Science and Technology,Qingdao 266590)

机构地区：[1]山东科技大学电气与自动化工程学院,青岛266590

出　　处：《电气工程学报》2020年第4期45-51,共7页Journal of Electrical Engineering

基　　金：山东省重点研发计划(公益类)(2019GGX103049);山东省研究生教育质量提升计划项目(优质课程):现代电力电子技术(SDYKC17032)资助项目。

摘　　要：针对传统Buck-Boost变换器的输出电压能力有限,输出稳定性较差以及可调占空比范围不足等问题,提出了一种新型Buck-Boost变换器拓扑,对该变换器的工作原理进行了分析,并推导了该变换器的输出和输入电压关系以及电容的电压应力表达式。与传统Buck-Boost变换器相比,该变换器工作在更合理的占空比范围内,实现了更好的降压效果。仿真的结果验证了理论分析的正确性。试验的结果表明,该新型Buck-Boost变换器是可行的。For the problems of traditional Buck-Boost converter including limited output voltage and poor stability,and the adjustable duty cycle range is insufficient,a new Buck-Boost converter topology is proposed.The working process of the converter is analyzed,the output-input voltage relationship of the converter and the voltage stress expression of the capacitor are derived.Compared with the traditional Buck-Boost converter,the new converter can achieve better voltage reduction effect when working in a more reasonable duty cycle range.The simulation results verify the correctness of theoretical analysis,and the experimental results show that the new Buck-Boost converter is feasible.

关 键 词：DC-DC变换器 占空比 电路拓扑结构 电压应力 

分 类 号：TM464[电气工程—电器]