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Microcontroller Based DC Motor Speed Controller

The project keeps the speed of DC motor constant despite the changes in loads. Whenever there is a change in the load of the motor, its speed varies. The microcontroller senses the variation in the speed and changes the DC voltage to the motor to counter the change. The speed is sensed by a set of sensors namely: Optical Encoder and Frequency to Voltage converter.

The supply available is three-phase AC (Alternating Current) which is rectified (converted) to DC. This rectified voltage is fed to the motor via a chopper, which controls the motor voltage. The voltage to the motor is controlled according to the signal generated by the microcontroller which is a series of PWM (Pulse Width Modulated) signal. The signal (PWM) from the microcontroller depends on the speed of the motor which is fed back to the microcontroller via a speed to voltage converter. The microcontroller used is ATMEGA 16L and Code Vision AVR C-Compiler for programming.


  • Abhay Kumar Karna
  • Shaishav Koirala
 

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