基于活动面积矢量的SPWM与SVM逆变技术

以三相全桥电路为基本模型,通过分析开关脉冲的本质提出了一种基于活动面积矢量(AAV)的分析方法,并应用该方法揭示了空间矢量调制(SVM)和正弦脉宽调制(SPWM)的根本联系与区别,提出相应改进方法:提高SPWM的直流母线电压利用率,并有效减少SVM的运算量。仿真和实验结果证明基于活动面积矢量的分析方法应用于SPWM-SVM中是可行的,与传统SVM相比,AAV-SVM避免了计算正弦函数非线性运算,大幅度缩短了计算时间,从而缩短了最小采样周期,提高了整个系统的传输带宽。

Research on SPWM and SVM based on active area vector

With the three-phase full-bridge DC-AC inverter as the basic model,AAV(Active Area Vector)analysis is presented by explaining the essence of switching pulse,with which the difference,as well as the relation,between SVM(Space Vector Modulation)and SPWM(Sinusoidal Pulse Width Modulation)are discussed,and the improvements are introduced to increase DC usage of SPWM and decrease computation load of SVM.Simulations and experiments verify its applicability to SPWM and SVM.Compared with traditional SVM,AAV-SVM avoids the nonlinear computation of sinusoid function,resulting in shorter minimum sampling cycle and bigger system transmission bandwidth.