一种三相四桥臂空间矢量脉宽调制方法  

A Novel Three-phase Four-leg Space Vector Pulse Width Modulation Algorithm

作　　者：罗耀华[1] 许铁岩[1] 

机构地区：[1]哈尔滨工程大学,自动化学院,黑龙江哈尔滨150001

出　　处：《电力电子技术》2013年第1期61-63,共3页Power Electronics

基　　金：国家海洋可再生能源专项资金项目(GHME2010GC02)~~

摘　　要：空间矢量脉宽调制(SVPWM)具有直流电压利用率高和输出电压谐波含量少的优点,但现有的应用于三相四桥臂逆变器的三维(3D)SVPWM算法存在计算过程复杂且计算量大的缺点。通过分析传统二维(2D)SVPWM算法输出调制波的直流分量,提出一种新的3D-SVPWM简化算法。该算法将三相电压参考分为交流分量和直流分量两部分,交流分量用来计算三相调制波及其调制波直流分量,直流分量用来计算第四桥臂的调制波。该算法具有过程简单、计算量小的优点。实验结果证明了该算法的正确性和有效性。Space vector pulse width modulation（SVPWM） has the advantages of high DC voltage utilization ratio and less output harmonics,however existing three dimensional（3D） SVPWM algorithm used for three-phase four-leg inverters is too complex and has a large amount of calculation.A novel simplified 3D-SVPWM algorithm is proposed based on the analysis of the DC component of the modulation waves by the traditional two dimesional（2D） SVPWM algorithm. By the novel algorithm,the a,b,c phase modulation waves and the DC modulation component are obtained from the AC component of the voltage references,the fourth phase modulation wave is obtained from the DC component of the references.The proposed algorithm is simple and has small amount of calculation.The experimental results verify the validity and effectiveness of the proposed algorithm.

关 键 词：逆变器 空间矢量脉宽调制 三相四桥臂 不平衡负载 

分 类 号：TM464[电气工程—电器]