PI Controller Design for DC Motor Using Different Power Electronic Converters

Abstract

In this paper, the design of a PI controller of a DC motor closed-loop torque control system is presented. The controllers are designed using small signal models and then verified using large signal simulation. A step by step design procedure is carried out to determine the response of each loop and appropriate parameters of the PI controllers are shown throughout this study assisted by Bode Plot and pole zero map techniques. In this paper also, there is comparison made when using different power electronic converters between 3-phase controlled rectifier and 4-quadrant switch mode DC-DC converter. It is highly demanded to design the PI controllers that will result in high performance in terms of high speed of response, low steady state error and high degree of stability. In this paper, simulation studies are included to show that the PI controllers designed could control the torque as desired and achieve satisfactory performance. The analysis of performance of torque and speed is compared with the desired (reference) values based on MATLAB/SIMULINK simulation.