单片机控制的全数字锁相直流调速系统

A Single Chip Microcomputer Based DC Motor′s Speed Regulating System With All Digital and PLL Control

文章阐述了在直流电动机速度控制中数字锁相原理的应用及以８０３１单片机为基础构成的全数字锁相调速系统的实现。提出并实现了三闭环（相位环，速度环，电流环）的变结构控制方案，还利用单片机实现了转速频率给定、晶闸管触发、三闭环ＰＩ算法、数字Ｍ／Ｔ测速及速度实时显示等功能。

This paper reports on the application of the phase lock loop (PLL) technique to DC motor′s speed regulating and the realization of a all digital PLL system based on single chip microcomputer. In the system a variable structure was applied, and functions of speed setting, all digital trigger, three loops PI algorithm, M/T method and speed show were realized.