Torque ripple minimization and speed control of bldc motor with various hybrid control techniques

Abstract

Brushless Direct Current motor (BLDC) is also known as an electronically commutated motor and is used in many industrial applications. It has many characteristics that include inherent simple construction, high efficiency, low manufacturing cost, low inertia, high speed, high torque to inertia ratio, simple power converter circuits with reduced number of switches and fault tolerance that make it a strong candidate over other motors in variable speed drive applications. High torque ripple and acoustic noise are the main drawbacks of the BLDC motor drive. The main reasons for the torque ripple problems include the stepping nature and the inherent nonlinear characteristics of the motor, which cause an undesired effect on the bearing. There are two approaches to solve the problems of the BLDC motor followed by the reduction in torque. The first one is the improvement in the magnetic design of the motor and the other utilization of advanced control techniques. newlineThis research work presents a control strategy for the speed and torque controller of the BLDC motor. With the utilization of this control strategy, the torque ripple is minimized and the speed is regulated. Generally, a high performance of BLDC motor is mainly characterized by torque ripple minimization and energy efficiency optimization. The dynamic behavior of the BLDC motor is analyzed in terms of different operating parameters such as the speed, current, inductance and torque. Based on the parameters, the motor speed which controlled minimizes the torque ripples. BLDC motor performance can be improved by minimizing torque ripple, tracking speed and current error, fast and accurately to their respective reference values. In this work, newline