DC motor plays a vital role in most of the industrial areas, it can be seen in most of the electronic devices. They are mainly used for the mechanical movements of physical applications such as rolling the bundle of sheets or CD drives, lifts etc.
The aim of this kit is to analyze four quadrant speed control of the DC motor. The motor is operated in four quadrants viz, clockwise; counter clock-wise, instantaneous forward brake and instantaneous reverse brake. The speed of DC motor is directly proportional to the DC voltage applied across its terminals. Hence, if we control the voltage applied across its terminal, we actually can control its speed.
Instantaneous brake happens as a result of applying a reverse voltage across the running motor for a brief period. Here we use microcontroller from 8051 family. Push buttons are used as inputs to control the motor speed, to change direction and also to apply brakes to the motor. PWM is generated at the output by using program burned onto the microcontroller. The program is written in Embedded C