一种新型拓扑结构的三电平变换器  

A Three-Level Inverter with a New Topology

作　　者：董卫民[1] 贺昱曜[1] 胡丽丽[1] 

机构地区：[1]西北工业大学,陕西西安710072

出　　处：《微特电机》2011年第1期35-37,40,共4页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(60871080)

摘　　要：针对多电平变换器中二极管、电容和开关管数量多,中点电位不平衡和控制复杂的问题,设计了一款新型拓扑结构的三电平变换器,它采用两个逆变器输入并联输出串联的拓扑结构,通过555定时器来控制两个逆变器的工作和停止,达到控制输出电压的目的。仿真和实验证明,该三电平变换器结构简单,克服了中点不平衡的问题,控制简单,输出电压灵活多变,具有一定的研究意义。To solve the problems that the number of diodes,capacitors and switches is large,that the mid-point is imbalanced and that control is very complex,this paper designed a three-level inverter based on a new topology with input-parallel and output-series and controlled by 555.Simulation and experimental results show that the three-level inverter is simple in structure,easy to control and overcomes the imbalance of mid-point.The output voltage is flexible and the inverter has some research significance.

关 键 词：三电平变换器 输入并联输出串联 中点电位平衡 

分 类 号：TM464[电气工程—电器]