Brushless Dc Motor Speed Control Using Proportional-Integral And Fuzzy Controller

This paper demonstrates the detailed analysis of Proportional-Integral (PI) controller and Fuzzy Logic controller for speed control of a Permanent Magnet Brushless DC (PMBLDC) motor for different speed commands and varying load torque conditions. Implementation of PI controller in closed loop conditions is done. Analysis of classical tuning methods to obtain best PI parameters for speed control is calculated. Fuzzy controller is also implemented for the same and the simulation results obtained for both PI and Fuzzy control in MATLAB/Simulink are compared. PI controllers have poor response due to overshoot, more drop in speed and oscillations. Intelligent control like Fuzzy Logic is gaining momentum as it can overcome these disadvantages. Microcontroller based controller implementation is tested using a virtual motor and the results or PI controller are validated using software results. Keywords– BLDC, Fuzzy logic controller, PI controller, PWM and virtual motor