摘要
在大功率逆变器的实时控制中,如何快速准确地计算出SPWM交点是一个关键问题。文中介绍了SPWM差值二次逼近算法的原理,推导了各种SPWM调制方式下的计算公式,并分析了算法误差及谐波分布,给出了SPWM同步调制方式下该算法实现的程序框图。该算法在4000kW交直交电力机车油冷变流机组地面试验系统中得到验证,并取得了良好效果。
How to calculate SPWM cross point rapidly and accurately is a key problem in the real time controller of high power inverter. This paper introduces the theory of SPWM differential second approximation arithmetic,the formula,the error and harmonics of serial modulation.The block diagram of program under synchronous modulation are given.This arithmetic has been applied in AC 4000 AC DC AC drive electric locomotive inverter controller,and has got good results.
出处
《机车电传动》
北大核心
1997年第4期16-19,27,共5页
Electric Drive for Locomotives
基金
"八五"国家重点科技攻关项目
关键词
逆变器
SPWM
差值
二次逼近算法
电力机车
inverter,real time control,SPWM,differential second approximation arithmetic,error analysis,test result.