直流电机的数字同步锁相

THE DIGITAL SYNCHRONOUS PHASE-LOCKED LOOP OF THE DIRECT CURRENT SERVOMOTOR SYSTEM

在某高速摄影机中,我们采用了同步数字锁相环路,本文叙述该机中直流电机的数字同步锁相原理及其所用数字相位误差积分器线路的构成。

A synchronous digital phase- locked loop (PLL) circuit has been used in the control system of a high speed camera. The main parts of the circuit consist of the digital phase detector and the digital error integrator. In this paper, not only the basic principle and mathematics equation of the digital error integrator, but also the typical PLL and it's prin-ciple are introduced. The synchronous PLL circut is used in the direct current servomotor system. It's performance is very good even in the conditions of the load variation and the components parameter drift. The error of the synchronous PLL is less than 3%. The experimental results show that the cricuit is good in performance and use.