Design of PWM Regulating Speed system of DC Motor Based on Single-Chip Microcomputer

There are many advantages,such as high precision,good stability and easy debugging,for DC moter's speed adjusting system based on single-chip microcomputer.This paper introduces a double closed loop DC PWM speed regulation system which is based on AT89S52 as primary controller and PIC16F877A as secondary controller.With other peripheral electric circuits,this design can contains multi-purpose including the speed adjusting for DC motor,the protection,the real-time testing for speed and the value to display.Experimental results show that this control system has better functions.