PWM整流器谐波特性分析  

Analytical Solution to Harmonic Characteristics of PWM Converter

作　　者：葛兴来[1] 冯晓云[1] 刘柏思[1] 

机构地区：[1]西南交通大学,四川成都610031

出　　处：《电力电子技术》2009年第4期67-69,共3页Power Electronics

基　　金：校博士研究生创新基金(2008);青年教师科研起步项目(2008Q013)~~

摘　　要：采用定量数学分析方法详细推导出单相两电平脉冲整流器的输入侧电压谐波特性;整流器的控制采用自然采样双边正弦脉宽调制(SPWM),给出用3D几何墙模型生成SPWM的方法。通过用双重傅里叶级数形式表示脉冲整流器输入侧的电压PWM波形,计算得出单个整流器的谐波特性,总结了各次谐波生成和消除的规律。为了防止同一桥臂上下直通,需要加入死区时间,这又将加重谐波的影响。用Matlab/Simulink软件对上述理论分析计算模型的精确性进行了仿真验证,基于TMS320F2812的实验结果也表明了分析的合理性。An analytical technique is researched theoretically, which can calculate the AC input voltage harmonic spectra of single-phase PWM conveter used in railway traction.The double edge modulated naturally sampled SPWM is assumed. The technique bases on a three-dimensional geomitrical wall model and the double Fourier series method.Spectra of PWM converter bridge are derived.The analysis predicts the complete harmonic generation and cancellation process of certain characteristic harmonics and their sidebands.The harmonic characteristics considered the effects of dead time are obtaind also.The accuracy of this technique is confirmed by comparing the results with simulations using Marlab/Simulink and expriment based on TMS320F2812.

关 键 词：整流器 脉宽调制/谐波分析 几何墙模型 双重傅里叶级数 

分 类 号：TM461[电气工程—电器]