一种抑制半桥逆变器输出电流畸变的新方法

半桥逆变器应用广泛，但存在直流分压电容不均压，使分压电容中点电压漂移，导致输出电压和电流畸变的缺点．分析了引起输出电流畸变的原因，并提出可根据系统工况分段控制开关频率的方法来解决由这些原因引起的输出电流畸变．通过对系统的仿真分析，结果表明该方法简单易行，能够比较有效地解决这一问题．

A New Way to Restrain Output Current Distortion of Half Bridge Converter

Output voltage and current is often distorted in half bridge converter because voltage unbalance of input capacitors though its application is very abroad.The reason of output current distortion is analyzed;and a new way to resolve the problem is put forward;it is controlling switch frequency changing in different sections according to system run state.By simulation,the way is very simple and can be realized easily.