带反电势负载的三相发电机整流系统直流脉动分析  

DC RIPPLE ANALYSIS OF THREE-PHASE GENERATOR-RECTIFIER SYSTEM WITH BACK-EMF LOAD

作　　者：孟进[1] 马伟明[1] 刘德志[1] 张磊[1] 

机构地区：[1]海军工程大学电力电子技术应用研究所,湖北武汉430033

出　　处：《中国电机工程学报》2002年第3期53-57,共5页Proceedings of the CSEE

基　　金：高等学校优秀青年教师教学科研奖励计划资助项目

摘　　要：目前应用广泛的交流发电机整流系统向负载供电时 ,通常在直流侧带反电动势和RC滤波器以改善直流输出电压的谐波特性。该文基于d q坐标系下同步发电机的基本磁链和电压方程 ,经过合理的简化处理 ,建立了三相交流发电机整流系统的等效电路模型 ,把交流电机看作带内部阻抗的正弦电压源。利用整流器开关函数导出了直流输出电压的数学模型 ,引入直流电压脉动系数的定义来描述输出电压的特性。通过实验研究分析了带RC滤波器和反电动势负载时输出电压的谐波及脉动系数 ,与计算结果对比验证了文中方法的正确性。In widely used generator rectifier systems,RC filter and back EMF are commonly mounted to improve the harmonic characteristics of DC side output voltage.An equivalent circuit model of the three phase generator rectifier system with back EMF load is constructed in this paper.The proposed method is based on the principal flux linkage and voltage equations on the d q coordinates of the synchronous machine.The AC generator is regarded as sine supply voltage sources with impedance and reactance.The mathematical models for output voltage harmonics are derived based on the rectifier switching funtions.The harmonics and ripple coefficients of the output voltage are analyzed both in case of DC side with RC filter and with back EMF load.The validity of the proposed method is demonstrated by the results of experiment.

关 键 词：三相发电机 整流系统 直流脉动分析 反电势负载 交流发电机 

分 类 号：TM34[电气工程—电机]