西门子的优化三电平PWM信号生成方法  

An Optimized PWM Method Used in Three-Level Inverters

作　　者：马小亮 魏学森[2] 

机构地区：[1]电气传动设计研究所 [2]天津大学

出　　处：《变频器世界》2010年第1期47-52,共6页The World of Inverters

摘　　要：本文介绍西门子公司使用的优化三电平PWM信号生成方法,它基于三角载波比较法,计算量少,响应快,实现简单,输出谐波小,有直流母线中点电压自平衡能力。其特点是能解决输最窄脉冲限制影响输出电压波形问题,允许开关频率小于500Hz,且每周期开和关的次数不大于1,开关损耗小。This paper introduces a PWM control method used in three-level inverter, which has the following characters： based on triangle-carrier-wave comparing method, less calculation work, quick response, simplicity and less output harmonics, self-balancing ability of neutral-point voltage and unaffected ability caused by narrow-pulse. Meanwhile, it is possible to work with switching frequency less than 500 Hz and make the working times of each switch no more than 1 in a switching period.

关 键 词：三电平PWM 三角载波比较 最窄脉冲限制 中点平衡 开关频率 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]