一种基于TMS320F2812的软件锁相环实现方法

Realization Method of Software Phase-locked Loop Based on TMS320F2812

介绍一种基于TMS320F2812三相软件锁相环的实现方法。该方法利用PI调节器输出的误差角频率与TMS320F2812定时器计数值的对应关系,产生定时器周期中断,在中断程序中加固定角度,达到锁相的目的。该方法取代了软件锁相中复杂的积分环节,使实现方法简化。在三相电压型PWM整流器控制系统中的应用结果表明该方法的可行性。

A realization method of three phases software phase-locked loop（SPLL） based on TMS320F2812 is presented.The method uses the correspondence between PI regulator output error of the angular frequency and the TMS320F2812 timer counts,resulting in timer periodic interrupt and adding a fixed angel during the interruption process,to achieve the purpose of phase-locked.This method replaces the SPLL integral part of the complex to simplify the implementation method.A novel three phases SPLL is used in PWM rectifier control system,the experimental results prove the scheme is feasible.It has certain reference value in the project.