MICROCONTROLLER
BASED DC MOTOR
Abstract :
The project is designed to control
the speed of a DC motor using an Arduino Uno microcontroller. The speed of DC
motor is directly proportional to the voltage applied across its terminals.
Hence, if voltage across motor terminal is varied, then speed can also be
varied. This project uses the above principle to control the speed of the motor
by varying the duty cycle of the pulse applied to it (popularly known as PWM
control). The project uses two input buttons interfaced to the microcontroller,
which are used to control the speed of motor. PWM (Pulse Width Modulation) is
generated at the output by the microcontroller as per the program.
The program can be written in
Assembly language or in Embedded C. The average voltage given or the average
current flowing through the motor will change depending on the duty cycle (ON
and OFF time of the pulses), so the speed of the motor will change. A motor
driver IC is interfaced to the microcontroller for receiving PWM signals and
delivering desired output for speed control system of a small DC motor. Further
the project can be enhanced by using power electronic devices such as IGBTs to
achieve speed control higher capacity industrial motors.
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