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特定谐波消除及优化脉宽调制单相整流器的研究

, PP. 57-64

Keywords: 特定谐波消除,单相整流器,优化脉宽,整流变压器

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Abstract:

特定谐波消除(SHEPWM)及优化脉宽调制(OPTPWM)通过开关时刻的优化选择,具有输出波形谐波含量小、效率高、直流电压利用率高等优点。本文提出了在单相电压型PWM整流器中采用SHEPWM或OPTPWM调制策略,并与SPWM调制进行比较。首先对单相整流器SHEPWM、OPTPWM调制策略的原理及控制策略进行了分析,并通过50kV·A单相整流器进行仿真分析和实验验证。仿真和实验结果表明,采用SHEPWM或OPTPWM调制策略网侧输入电流总谐波畸变率、整流变压器绕组谐波损耗及铁心损耗都要低于SPWM调制策略。

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