నైరూప్య

Design of Intelligent Controller to Reduce the Torque Ripple in a Brushless Dc Motor Drive

V.Shanthamoorthy,N.M Jothi swaroopan

Brushless DC Motors (BLDCM) are one of the motor types rapidly gaining popularity. They are being widely used in industries such as aerospace applications, Automotive, Consumer, Medical, Industrial automation Equipment and Instrumentation because of their inherent advantages of low inertia, high dynamic response, noiseless operation, higher speed ranges and high efficiency. In addition the ratio of the torque delivered to the size of the motor is higher, making it useful in applications where space and weight are critical factors. The BLDC motors have the drawback of high torque ripples which causes problem like acoustical noise and vibration that affects the performance of system . It is always preferred to have a drive with faster, smoother speed response and reduced ripples in current and torque. In this project a simple control scheme has been implemented which does not need to know the back emf or shape function and even no complicated calculations. In order to solve the problems associated with the conventional PI speed controller, the fuzzy based speed controller is proposed to eliminate the torque ripples. It is simple in design and eliminates the complex mathematical computations. The effectiveness of the proposed system has been validated by simulation results. The performance is demonstrated using MATLAB/SIMULINK