摘要
随着对高电压增益特性需求的不断增长,传统Boost电路由于过大的占空比已不再适用。该文在传统Sepic电路的基础上,通过两个二极管、三个电容和一个变压器的集成,提出了一种改进型Sepic变换器。通过采用平面磁性元件,磁心的体积不会增加,同时获得了较高的电压增益和较低的电压应力。此外,实现了开关管的零电压开通(ZVS),有效降低了由开关频率的增加而带来的开关损耗。详细介绍所提变换器的工作原理和参数设计过程,并制作了80W的样机,验证理论分析的准确性,满载时效率可达到92.6%。
With the demand of high voltage gain characteristic,traditional boost circuit is no longer suitable due to its extreme duty ratio.In this paper,a 1MHz modified SEPIC converter was presented by integrating two diodes,three capacitors and a transformer.By using planer magnetic components,the core volume does not increase.Higher voltage gain and lower voltage stress are obtained simultaneously.Moreover,zero voltage switching(ZVS)is achieved at the same time,which reduces the switching loss caused by the increase of switching frequency.The operational principle and parameter design process are introduced in detail.An 80W prototype has been designed to demonstrate theoretical analysis.The obtained efficiency can reach 92.6%at full load.
作者
高珊珊
王懿杰
徐殿国
Gao Shanshan;Wang Yijie;Xu Dianguo(Department of Electrical Engineering Harbin Institute of Technology Harbin 150001 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2019年第16期3366-3372,共7页
Transactions of China Electrotechnical Society
基金
国家重点研发计划项目专项资助项目(2017YFB0402800)
关键词
高频
高升压比
低电压应力
软开关
SEPIC
High frequency
high voltage gain
low voltage stress
soft switching
Sepic
