VIENNA整流器的指令电压辅助区间判断SVPWM控制

针对三相三开关三电平整流器(VIENNA整流器)的空间矢量脉宽调制(SVPWM)控制问题,提出了一种指令电压辅助区间判断的SVPWM控制方法。依据VIENNA整流器的拓扑结构和数学模型,研究了传统SVPWM控制方法的实现流程。分析了单位功率因数工况下的交流侧相量关系,给出了电流矢量和电压矢量的固定关系。通过对电压空间矢量平面进行扇区划分,给出了指令电压辅助区间判断SVPWM控制方法的实现流程。实验结果验证了该方法的正确性和有效性。该方法不需要进行电流区间判断,简化了控制算法实现过程,并且该方法提高了电压空间矢量平面扇区的划分数量,提高了电流控制分辨率。该方法可广泛应用于开关电源的输入整流模块中。

Control of VIENNA rectifier with reference voltage assisted sector judgment based SVPWM

Focused on control of three-phase three-switch three-level rectifier ( VIENNA rectifier ) with space vector pulse width modulation ( SVPWM) ,a reference voltage assisted sector judgment based SVP-WM method was presented.According to the VIENNA rectifier topology and mathematical model,the re-alization process of conventional SVPWM control method was studied.The relationship of AC side phasor under unity power factor was analyzed and the fixed relationship between current vector and voltage vector was presented.The reference voltage assisted sector judgment based SVPWM control method and its reali-zation process were presented,following the sector division of the voltage space vector plane.Experimen-tal results verified the presented method’ s validity and effectiveness.The presented method doesn’ t need current sector judgment and simplifies realization process of the control method.Also,the presented meth-od increases the sector numbers of the voltage space vector plane,which improves the current control reso-lution.This method can be widely used in the input rectifier modules in switch power supplies.