摘要
随着电力电子器件的高频化发展,开关损耗成为电路主要损耗方式。降低开关损耗的有效途径是采用软开关技术。无源无损缓冲电路由于结构简单,易于控制,可靠性高,近年来得到广泛关注和研究。设计了一种新型最小应力无源无损缓冲电路,分析了其工作原理,阐述了其各阶段工作情况,设计了电路参数,并基于Buck电路搭建了一个1 kW最小应力无源无损缓冲电路进行实验。实验结果证明,最小应力无源无损缓冲电路实现了Buck电路中开关管的零电流开通(ZCS)与零电压关断(ZVS),可有效降低开关损耗,提高系统转换效率。
With the development of high frequency of the power electronic devices, switching-loss is the main part of losses.Soft-switching teehnolobgy is an effective way to reduce switching-loss.Owing to simple structure, easy control,high reliability, passive lossless circuits is widely concerned and researched.A 1 kW minimum stress passive lossless snubber circuit is designed based on Buck converter, meanwhile, the working principle is analysed, the working condition of each phase is described, the circuit parameter is designed.The experimental results verify that the circuit provides zero-eurrent-switching（ZCS） and zero-voltage-switching（ZVS） conditions for turning on and off, it can reduce switching loss effectively and improve the efficiency of conversion.
出处
《电力电子技术》
CSCD
北大核心
2012年第9期49-51,共3页
Power Electronics
基金
国家自然科学基金(No.51279039)~~
关键词
缓冲电路
最小应力
无源无损
软开关
snubber circuit
minimum stress
passive lossless
soft-switching
