Microprocessor based closed loop speed control of DC motor using PWM

Most of the Electric drive systems should possess these benchmark properties like linear control, reliability and stable operation. Dc driven machines gain some advantage in these perspectives. The speed control strategies of DC motor plays a vital role in the performance of drive. The main Purpose of speed controller is to take an appropriate signal sample of speed and to bring the motor to that desired speed. The benchmark objective of dc drive is to maintain a system with the stable speed irrespective of load condition. In this project, PWM that can be used for speed control of a DC motor is generated using P89V51RD2 microcontroller. DC motor is fed by a driver IC L293D. The L293D is driven by the PWM signal generated by the microcontroller. This work is a practical one and high feasible according to economic point of view and accuracy.