Simulation of BLDC Motor Control Using Conventional PI Controller in MATLAB Simulink

Abstract

This research Paper presents a comprehensive analysis of Brushless DC (BLDC) motors, focusing on their construction, operating principles, and control methodologies, particularly in variable-speed applications. BLDC motors are highlighted for their advantages over traditional DC brushed and AC induction motors, including enhanced efficiency, longer operational lifespan, and suitability for environments sensitive to electromagnetic interference. The paper details the essential components of a modern variable-speed drive system and emphasize the role of Hall effect sensors in rotor position sensing, which is critical for effective motor control. A simulation model employing a PI controller for closed-loop operation of a BLDC motor is developed, demonstrating the implementation of a Hysteresis Current Controller to maintain current within a specified band. The study encapsulates the relationship between speed and back EMF in BLDC motors and showcases the effectiveness of the proposed control strategy through simulation results. Overall, the findings underscore the potential of BLDC motors in high-performance applications, with implications for future research in advanced motor control techniques.