摘要
高频化是电力电子装置提高功率密度的有效手段,高频化引起电力电子开关器件的开关损耗增加,无源无损软开关电路可有效降低电力电子开关器件的开关损耗。以最小电压应力(MVS)无源无损软开关电路、非最小电压应力(NMVS)无源无损软开关电路及最小电压电流应力(MVCS)无源无损软开关电路等3种主流的无源无损软开关Buck变换器为对象进行研究,从拓扑结构、占空比、电压电流应力、开关损耗及转换效率等几个方面进行比较研究。搭建了硬件实验环境,经理论分析和实验验证得出MVCS软开关电路具有更加良好的性能,为无源无损软开关电路的应用提供设计依据。
High frequency is an effective means to improve power density of power electronic devices, but it will increase switching losses of power electronic devices. Passive lossless soft-switching can effectively reduce switch loss of power electronic switch device. Three kinds of mainstream passive lossless soft-switching Buck converters, including minimum voltage stress （MVS） lossless passive soft-switching circuit, the non-minimum voltage stress （NMVS） passive lossless soft-switching circuit and minimum voltage and current stress （MVCS） passive lossless soft-switching circuit are studie＆ The comparative study is carried out from aspects of topology structure, duty cycle, voltage and current stress, switching losses and efficiency of conversion. A hardware experimental environment is built, through,theoretical analysis and experimental verification show that the MVCS soft-switching circuit has better performance, which provides design basis for application of passive lossless soft-switching circuit.
出处
《传感器与微系统》
CSCD
北大核心
2013年第12期86-89,共4页
Transducer and Microsystem Technologies
基金
国家自然科学基金项目资助(51279039)
关键词
无源无损
软开关
变换器
开关损耗
效率
passive lossless
soft-switching
converter
switching loss
efficiency
