A Comparative Study between IP and PI Controllers for Speed Control of Direct Current Motor

Abstract

At the present time, Direct Current (DC) motors have been widely used in many industrial applications. The main reason for their popularity is the ability to control their torque and flux easily and independently. Therefore, the control of the speed of a DC motor is an important issue and has been studied since the early decades in the last century. The most commonly used controller for the speed control of DC motors is conventional Proportional– Integral (PI) controller. In spite of the major features of the conventional PI controller, it has some disadvantages such as the high starting overshoot in speed, the sensitivity to controller gains and sluggish response due to sudden disturbance. To overcome these disadvantages, replacement of PI controller by Integral plus Proportional (IP) controller is proposed in this project. Performance of two controllers has been verified through simulation results using MATLAB/SIMULINK software. According to the simulation results, IP controller creates better performance in terms of overshoot, settling time, and steady state error compared to conventional PI controller. This shows the superiority of IP controller over conventional PI controller.