• 1Avinash Krishna Raikwar
• C.S.sharma

The speed of the separately excited DC motor can be controlled from below and above the rated speed by using buck converter. This paper presents the speed control methodology by varying armature voltage of the DC motor. The chopper gives variable voltage to the armature of the motor for achieving desired speed using Proportional Integral (PI) controller. The reason behind using PI controller is it removes the delay and provides fast control. The modeling of separately excited DC motor is done and the complete layout of DC drive mechanism is obtained. The reference signal is compared with triangular carrier signal and to produce the PWM pulses for chopper switch. The simulation model is constructed in the MATLAB/SIMULINK. The simulated output parameters of the DC motor such as; armature current, voltage, speed, torque, and field current are analyzed. The MATLAB simulation will be used to perform the various conditions of loads but here we are taken as a constant load with small disturbance. So the motor speed will be disturbed with small time period and maintained the constant and PI controller having a different gain value.

Armature Voltage control, DC/DC Buck converter, Proportional Integral (PI) controller. PWM generator, separately excited DC motor.

"Chopper Fed Closed Loop Speed Controller System For Separately Exited Dc Motor For Industrial Application USING PI Controller ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 7, page no.a642-a652, July-2021, Available :http://www.jetir.org/papers/JETIR2107084.pdf

"Chopper Fed Closed Loop Speed Controller System For Separately Exited Dc Motor For Industrial Application USING PI Controller ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 7, page no. ppa642-a652, July-2021, Available at : http://www.jetir.org/papers/JETIR2107084.pdf