SPWM逆变电源输出变压器直流不平衡问题

The DC Unbalance of the Output Transformer in SPWM Inverter

Ｍ分析了导致ＳＰＷＭ逆变电源输出变压器直流不平衡的几种主要因素——控制系统造成的直流分量、脉冲分配及死区引起的直流分量和主电路引起的直流分量．在此基础上提出了两种相应的对策——静态补偿和适时补偿．实验证明，所提方案简单有效。

Main factors are analyzed causing the DC unbalance problem of the output transformer in SPWM inverter. Two methods are proposed to overcome this trouble. The experimental results show that the methods can improve dynamic character and reliability of the inverter system, being simple and effective.