摘要
提出了一种基于采样点一阶保持的线性外推正弦脉冲宽度调制(SPWM)新方法。详细论述了该方法的基本原理,给出了开关时刻的计算公式,并与传统的自然采样法和规则采样法进行比较,然后对该方法进行了仿真研究和实验验证。仿真和实验波形均表明,该线性采样法产生的SPWM波形谐波含量与采用自然采样法时相似,比采用规则采样法的谐波含量小,同时该方法和规则采样法一样易于数字化实现。
A new SPWM based on linear extrapolation of the sampling points is presented.Its basic principle is discussed in detail as well as the formula for calculating the switching time,and compared with the nature sampling method and regular sampling method,and then the method is verified by simulation and experiment.The tests results show that the harmonic content of SPWM waveform using the linear sampling method is similar to using the natural sampling method and better than using the regular sampling method,what’s more,the methods can be easily achieved by digital processor.
出处
《电力电子技术》
CSCD
北大核心
2010年第8期58-59,90,共3页
Power Electronics
