减小Z源逆变器电流电压应力的改进拓扑  

Improved Topologies of Z-Source Inverter with Lower Current and Voltage Stresses

作　　者：蒋立[1] 郑建勇[1] 

机构地区：[1]东南大学电气工程学院,江苏南京210096

出　　处：《江苏电器》2008年第8期1-5,12,共6页

摘　　要：在许多运用场合,特别是大功率和轻载条件下,Z源逆变器电流应力较大,调制系数与直通时间存在约束关系。为了缓和以上矛盾,经过分析,运用将Z源逆变器串联,H桥级联,附加分流管等方法构建了改进拓扑。通过MATLAB/SIMULINK软件对各种拓扑结构进行了仿真验证,证明了以上几种改进拓扑能大大减小Z源逆变器的电流和电压应力。In many cases, the limitation for Z-source inverter was revealed, especially in high power and light-load applications. The major problems were high current stress for inverter bridge and constraint relationship between modulation index and shoot-through duty. To solve these problems above, a few improved Z-source inverter topologies, such as cascading Z-source inverters and H bridges, adding shunting current diodes, were discussed in detail, being constructed. Simulation result relying on MATLAB/SIMULINK proves that these proposed topologies reduce the current and voltage stresses effectively.

关 键 词：Z源 电流应力 电压应力 Z源多电平 直通状态 

分 类 号：TM464[电气工程—电器]