无死区的特定谐波消除PWM控制策略的研究  

A Strategy of No-Dead-Time Control in SHEPWM

作　　者：孙琳琳[1] 郝瑞祥[1] 游小杰[1] 

机构地区：[1]北京交通大学电气工程学院,100044

出　　处：《电气应用》2008年第5期76-79,共4页Electrotechnical Application

摘　　要：特定谐波消除PWM控制策略是通过控制开关点的位置,消除特定次数的谐波,达到减少输出电压中谐波含量的目的。然而,加入死区时间,改变了开关时刻,影响了谐波消除的效果。因此提出了一种无死区的特定谐波消除PWM控制策略,优化输出波形,并利用Matlab/Simulink对所提的控制策略进行仿真,验证了控制方法的正确性。SHEPWM is a method eliminate the selected order harmonic and reduce the harmonic component in output voltage by controlling switching time sequence. But the dead-time which we have to add will change the switching time. And as a result, the SHEPWM does not work efficietively. No-dead-time control strategy in selective harmonic eliminate PWM is pre- sented, which optimizes the output waveform. The feasibility of the strategy of no-dead-time is confirmed by simulation of Matlab.

关 键 词：特定谐波消除 N-型结构 P-型结构 死区时间 

分 类 号：TM46[电气工程—电器]