基于Buck/Boost变换器的NMVS无源无损软开关  

Research on NMVS Passive Lossless Soft Switching Method Based on Buck/Boost Converters

作　　者：李雪莉[1] 

机构地区：[1]中国石化集团管道储运公司潍坊输油处,山东滨州256600

出　　处：《化工自动化及仪表》2011年第7期820-822,833,共4页Control and Instruments in Chemical Industry

摘　　要：针对有源无损缓冲电路结构和控制复杂的缺陷,开发了一种基于无源无损缓冲技术和谐振技术组合并在Buck/Boost变换器上实现,以此来设计具有非最小电压应力缓冲结构的软开关,通过对其7种工作模式下的工作流程分析,得到NMVS无源无损软开关电路单元并将缓冲元件的能量回馈给变换器的输入输出端,实现了无损的效果,并通过理论计算给出其具体的参数。与硬开关条件下的开关电流电压实验波形仿真对比,证实了其开关范围更广、效率更高、结构简单、性价比高,易于控制等优点。Considering the shortcoming of active lossless snubber circuits and complicated control,a soft switching method which has voltage stress（MVS） passive lossless switching technology and resonant technology combined and implemented in Buck/Boost converters was proposed to develop a NMVS passive lossless soft switching.Through analyzing its working process in 7 different modes,the NMVS passive lossless soft switching circuit cell can feed back the energy of buffers to the converter input and output sides to achieve a lossless effect.The experimental result proves the success of theoretical analysis.

关 键 词：NMVS 无源无损 软开关 Buck/Boost变换器 参数设置 

分 类 号：TP17[自动化与计算机技术—控制理论与控制工程]