基于DSP的新型SPWM采样方法

摘要

介绍利用数字信号处理器TMS320F2812产生SPWM波形的方法.分析比较了目前常用的几种SPWM采样方法.提出了一种新型的不对称规则采样法.与传统的不对称规则采样相比,此方法更加接近自然采样.同时,给出了用DSP实现的关键计算公式,并在硬件电路上实现,验证了该方法的可行性和有效性.%This paper presented some methods to generate SPWM based on digital signal processor TMS320F2812 chip and analyzed several typical SPWM sampling methods widely used at present. A new kind of asymmetric rules sampling method was presented which was compared with traditional asymmetric rules sampling. This new method sampling was closer than natural sampling. At the same time, the paper has presented the key calculation formula, implemented in hardware circuit and verified the feasibility and validity of this method.