无源无损软开关变换器对比分析  

Comparative analysis of passive lossless soft-switching converter

作　　者：孟繁荣[1] 王秋瑶 姚绪梁[1] 

机构地区：[1]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《传感器与微系统》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)

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.

关 键 词：无源无损 软开关 变换器 开关损耗 效率 

分 类 号：TM46[电气工程—电器]