Mathematical modeling and fuzzy logic control of a brushless DC motor employed in automobile and industrial applications

Abstract

Brushless DC motors (BLDCM) are most popular because of their higher efficiency, less maintenance and precise control characteristics. However, this motor has nonlinear nature and can be affected easily by the parameter change and disruption. For any automobile and industrial applications, it is essential to govern the speed accurately. Because of their fixed gain values, high peak overshoot and high settling time the conventional PI controllers are inadequate to control this motor accurately. In this paper, to resolve the complications coupled with the typical PI, Fuzzy Logic Controller (FLC) is intended to eradicate the overshoot and to produce fast speed response of motor. The mathematical modeling of BLDCM along with the controller has been deduced for a 10 kW BLDC motor. The simulations are done in Matlab/Simulink environment for validating characteristics of FLC.