PWM speed DC motor drive power design

This paper describes the design of a bipolar pulse-width modulation (PWM) dc motor speed control system, using Microchip's PIC16F876 micro-controller as the system control circuit, and is becoming the main technology of DC motor control. The advantages of the designed system are high-speed precision, fast response, wide speed range and low loss characteristics. The core of the system uses a series of Microchip's PIC16F876 PIC micro-controller as the system control circuit. And the performance of the system has been tested on a 20W dc motor drives.