Speed Control of DC Motor using Chopper (Matlab Simulation)

Abstract

Electric drives have numerous applications in diverse areas such as industry, transport, agriculture and domestic. The operation of electric drives are selectively regulated and made partly or fully automatic to increase the productivity and efficiency of the industry. The dc drives play a significant role in modern industrial drives due to its higher performance, reliability, adjustable speed control etc. The speed control of separately excited dc motor is carried out by varying the armature voltage for below rated speed and by varying field flux to achieve the speedat above the rated speed. This paper presents the speed control methodology by varying armature voltage using chopper as a converter. The controller used is proportional-integral type. Using this controller the fast correction is done by proportional term and the integral term takes finite time to act and makes the steady state zero. Now, to get stable and high speed control of dc motor, the overall chopper Simulink model is done and analyzed in MATLAB (SIMULINK) and also comparing with different types of controllers (P, PI, PID and PD), the speed and performance of the dc machine is measured.