Study of Four Quadrant Velocity Control System Based On Microcontroller for a Dc Motor

摘要

The main purpose of this paper is to create, with the aid of a microcontroller, a four-quadrant speed control of a DC motor. Any industrial organization has the most important part to control the speed of a machine. The main advantage in using a DC motor is that the Speed-Torque relationship can be varied to almost any useful form. To achieve the speed control, an electronic technique called Pulse Width Modulation is used which generates High and Low pulses. Those pulses vary the engine speed. A microcontroller is used for the generation of those pulses. As a microcontroller it is simple to adjust the speed ranges according to the requirement by adjusting the length of the program's duty cycles. Different speed grades and the direction are depended on different buttons. 8051 families' microcontroller used in this project and programming has been written in assembly language, then converted into hex file by using micro vision Kiel software. The burning of the program in the microcontroller has been done by using positron boot loader software.