一种新型软开关三相PWM逆变器拓扑的研究  

Study of A New Topology Soft-Switching Three-Phase PWM Inverter

作　　者：丁肖宇[1] 宋文祥[1] 陈国呈[1] 束满堂[1] 

机构地区：[1]上海大学机电工程与自动化学院

出　　处：《变频器世界》2005年第9期40-45,共6页The World of Inverters

摘　　要：本文提出了一种三相交流谐振环节软开关逆变器的电路拓扑及其控制方法。该拓扑采用正负斜率交替的锯齿载波,使所有功率开关器件的开通集中在锯齿载波的垂直沿处,在此时启动辅助谐振电路,完成功率开关器件的切换。分析软开关动作模式,并对各模式的过渡过程进行数学解析。对系统进行了仿真,仿真结果表明采用该控制方法能实现逆变器功率开关器件的零电压软开关动作。This paper proposes a topology of an inverter with a resonant AC linksoft-switching and its control strategy. Using sawtooth carrier wave with alternate slope （positive or negative）, the turn-on operation of all the power switch devices can be centralized at the reset timing of the sawtooth carrier wave. The operation patterns of the proposed ZVT softswitching topology are analyzed in detail, analyzing mathematically the dynamic process of each action mode in the operation. The digital simulation is performed, and the simulation results confirm that the ZVT soft-switching operation of power switch devices can be realized by the proposed control method.

关 键 词：逆变器 ZVT 软开关 交流谐振环节 

分 类 号：TM434[电气工程—电器]