一种三电平SVPWM算法及其DSP的实现  

Implementation of a Three-level SVPWM Algorithm Based on DSP

作　　者：伍小杰[1] 符晓[1] 潘庆山[1] 戴鹏[1] 

机构地区：[1]中国矿业大学

出　　处：《电力电子技术》2010年第8期47-49,共3页Power Electronics

基　　金：江苏省2009年度普通高校研究生科研创新计划(CX09B_113Z)~~

摘　　要：在传统三电平SVPWM算法中,计算各基本矢量的占空比常常涉及到三角函数或查表计算,从而耗费大量的控制器资源。分析了一种新型的多电平SVPWM算法,它从矢量合成的角度发展而来,通过选择合适的坐标系,可以方便地识别出合成参考矢量所需的矢量,并直接计算它们的作用时间,而无需复杂的扇区判断或查表运算。使用DSP实现了该算法,实验结果验证了该算法的有效性。There are always complicated sector identification and duty cycle calculations that would normally involve trigonometric function calculations or look-up tables in the conventional three-level SVPWM algorithms,thus taking up much controller resource.A novel SVPWM algorithm which is very fast and easy to implement is analyzed.It is developed from the basis of vector synthesis.With this algorithm,switching vectors which synthesize the reference vector need can be easily identified and their duty ratios can be obtained straightforwardly.The derivation of the algorithm and the steps of implementation are given.The experimental results with its implement on DSP are then presented for verification.

关 键 词：空间矢量脉宽调制 三电平 数字信号处理器 

分 类 号：TN787[电子电信—电路与系统]