一种新的三相4桥臂逆变器及其控制策略  

New Topology of Three-phase Four-leg Inverter and Its Control Strategy

作　　者：吴国平[1] 秦娟英[1] 

机构地区：[1]武汉理工大学

出　　处：《电气传动》2006年第3期40-43,共4页Electric Drive

摘　　要：三相4桥臂逆变器与传统三相逆变器不同。第4桥臂的引入,加上负载的不确定性,使得空间矢量调制控制变得非常复杂,从分析对称三相逆变器每相能独立工作出发,通过引入一特定结构的三相变压器并视其为负载,通过控制第4桥臂来控制负载中点电压,既实现了三相负载的解耦,又能使输出相电压达到220 V。仿真实验证明,该结构与方法对不同性质负载都有很好的适应性,并且容易实现。A three-phase four-leg inverter is much different from a traditional three-phase inverter. With an additional leg is introduced into the traditional three-phase inverter, the old space vector modulation control is very complex with respect to uncertain loads. This paper designed a new topology of three-phase fourleg inverter by introducing a certain three-phase transformer and view it as loads ,by controlling the operation of the forth leg, we can control the voltage of the neutral point, which can output 220 V voltage and achieve the decoupling of three phases. The simulation results proved it adapts to balanced and unbalanced loads.

关 键 词：三相4桥臂逆变器 不平衡负载 220V电压 适应性 

分 类 号：TM464[电气工程—电器] TM938.4