Design and performance evaluation of Fractional ORDER controller for Brushless DC Motor

Abstract

Recent developments and advancements in the areas of permanent magnets, power electronics and modern control technologies have significantly influenced the wide-spread use of Brushless DC (BLDC) motor drives. BLDC motors are now, widely used in many applications such as servo drives, computer peripheral equipments and electric vehicles due to their high power density, high efficiency, compact size and easier control. In this paper a control scheme is presented which uses the traditional PID controller for the speed control of BLDC motor. PID controller is designed both by Zeigler-Nichols tuning method and Genetic Algorithm. A controller based on fractional order PID is also designed using Genetic algorithm and the performances of fractional PID controller are compared with the performance of PID controller. MATLAB/SIMULINK software is used to simulate and test the performances of the designed controllers.