BLDC Motor Speed Control Using a Buck-Boost Converter: A MATLAB Simulink Approach

Abstract

This paper explores the speed control of Brushless DC (BLDC) motors using a buck-boost converter and a Pulse Width Modulation (PWM) inverter, modeled in MATLAB Simulink. Speed control is crucial for applications requiring precise and stable motor performance, such as electric vehicles, robotics, and industrial automation. One of the challenges in these systems is ensuring stable motor speed despite variations in input voltage and load conditions. In this research, a PWM inverter was employed to regulate the motor's speed by adjusting the voltage applied to the motor, with the buck-boost converter providing additional voltage stabilization. Simulation results demonstrated that the combination of the PWM inverter and buck-boost converter effectively stabilized the motor speed. The performance was analyzed regarding speed regulation, response time, and voltage stabilization under varying load conditions and input voltage fluctuations. The proposed system was found to provide a stable and reliable solution for BLDC motor speed control, confirming the advantages of using a PWM inverter alongside the buck-boost converter for efficient motor drive systems.

The results highlight the successful integration of these components, offering a robust and adaptable solution for controlling BLDC motors in demanding applications.