一种三相四桥臂逆变器的解耦控制策略  

A Decoupling Control Method of Three-phase Four-leg Inverter

作　　者：马海啸[1] 

机构地区：[1]南京邮电大学,江苏南京210046

出　　处：《电力电子技术》2012年第10期80-82,共3页Power Electronics

基　　金：国家自然科学基金资助项目(51107057)~~

摘　　要：三相四桥臂逆变器通常采用空间矢量控制策略,但该方法的空间矢量图抽象,难以理解,控制时需进行坐标变换,且开关矢量带有根号,所以空间矢量控制方法虽然具有电压利用率高、控制灵活、效率高等优点,但控制较为复杂。研究了一种零序电流注入的PWM控制策略。该控制策略不仅能实现三相四桥臂逆变器的解耦控制,且控制方法简单,易于理解和实现。与常规的正弦波调制方法相比,直流母线电压利用率得到了提高,且具有很好的带不平衡负载能力。最后,研制了一台逆变器原理样机,通过实验证明了理论分析的正确性。Three-phase four-leg inverters usually use space vector control strategy,but the space vector graph is diffi- cult to understand.Coordinate transformation is needed for using this method,and the switching vector needs to be rooted.Although the space vector control method has the characteristic of higher voltage using rate,flexible control and higher efficiency, but the control is more complicated.This paper researches a PWM control strategy with zero se- quence current injection.This control strategy achieves a decoupling control of the three-phase four-leg inverter,and be easy to control,understand and implement.Compared with the conventional sine wave modulation method, DC bus voltage utilization and imbalance load capacity are improved.A prototype of inverter is designed.The experimental re- suits prove the correctness of the theoretical analysis.

关 键 词：逆变器 解耦控制 脉宽调制 不平衡负载 

分 类 号：TM464[电气工程—电器]