一种新型的三电平逆变器中点电压平衡控制策略  

A New Control Strategy of the Neutral-point Potential Balance for Threelevel Inverter

作　　者：谢鸣静[1] 钟彦儒[1] 许波[1] 

机构地区：[1]西安理工大学自动化学院

出　　处：《变频器世界》2006年第5期47-49,共3页The World of Inverters

摘　　要：本文首先论述了三电平逆变器SVPWM的原理,利用最近三角形合成规则,推导了三角形定点矢量的作用时间。在此基础上,提出了一种通过判断中点电容电位而合理选择和分配小矢量的无电流传感器的中点电位控制方法,并作了具体阐述。理论分析和实验结果证明了此方法的有效性。In this paper, SVPWM principle is addressed for three-level inverter. By adopting principle of NTV（nearest three vectors）, the duty times of three active vectors for corresponding sub,triangle vertex is deducted, On the basis of this method, a single neutral-point balance algorithm without current sensor is developed, which adopts the method of advisable choosing and adjusting the duty times of small vectors. The new method is verified by experiment.

关 键 词：三电平逆变器 空间电压矢量调制 中点电位 

分 类 号：TM464[电气工程—电器]