活动面积矢量分析法在空间矢量调制中的应用

空间矢量调制(Space Vector Modulation,SVM)方法在降低逆变器开关频率,提高直流母线电压利用率方面具有独特的优势。为深入探索SVM的本质特征,简化SVM的实现方法并为新型调制方法的产生提供启发,阐述了通过分析三相全桥电路开关脉冲本质特征而建立的一种活动面积矢量(Active Area Vector,AAV)的分析方法;建立了AAV与开关脉冲的对应关系,并推导了不同AAV之间的等价变换性质。将AAV分析方法应用于SVM中可有效改善传统SVM运算量大的问题。仿真和实验结果验证了AAV活动面积矢量分析方法的正确性及其应用于SVM中的可行性。

Application of the Active Area Vector Method in Space Vector Modulation

Space vector modulation(SVM) has so many advantages such as low switch frequency and high DC voltage usage.In order to depict the essence of SVM,simplify the realization of SVM and bring out new modulation method,this paper presents an Active Area Vector(AAV) method by using the three-phase full bridge DC-AC inverter as the base model.The relation between AAV and switch states is analyzed,and the equivalence among different AAVs is also calculated.Based on DSP controller and the feature of AAV,the authors present a new way,which can decrease the computation obviously in SVM,to calculate the sector number and time.The simulations and experiments prove that the method based on AAV above is effective,and the AAV application in SVM is successful.