Brushless DC motor control with unknown and variable torque load

Abstract

This article presents the design of an Active Disturbance Rejection Controller (ADRC) for the permanent magnet Brushless DC motor (BLDC) to compensate the load torque variations in the rotor shaft, that does not requires the measurement of the rotor shaft speed. An additional advantage of this controller is that it is easy to implement and tune. A numerical simulation is included to validate the proposed scheme using the test emission cycle US06 that represents an aggressive high speed and high acceleration driving behavior with variable load torque for a commercial motor designed for electrical vehicles.