一种改进的生成SPWM波形的切线采样法

An improved tangent-sampling method for generating SPWM wave

介绍了用计算机控制的交流变频调速系统中产生SPWM波的一种新算法,阐述了该算法的原理,分析了该算法实时计算量及其采样精度,并与规则采样法作了比较.结果表明:该算法改进了规则采样法,其采样精度与规则采样法相比有较大提高而增加的工作量很小,开关点更接近于自然采样法,最后分析了用单片机实现该方法的可行性.

This paper introduces a novel method to form SPWM waves in an AC speed-regulating system controlled with a computer.The principle of this method is described and the real-time computational complexity is analyzed .In addition,the precision of tangent-sampling is compared with regular sampling.The result shows that the new method improves regular sampling considering the fact that sampling precision is increased compared with regular sampling,besides there is little increase in computational complexity.Finally,the feasibility is explained whether it is able to be realized by single-chip computer.