Robust Control of the Brushless DC Motor with Variable Torque Load for Automotive Applications

摘要

The design of an Active Disturbance Rejection Controller for the Brushless DC motor (BLDC) that compensates load torque variations in the rotor shaft without the measurement of the rotor shaft speed is presented. The reconstruction of the unknown load and motor speed is accomplished by the combination of a generalized Proportional Integral Control (PI) and a Luenberger observer, while the stator current regulation is designed around a passivity based controller. Using parameters of a commercial motor designed for a small electric vehicle under different driving conditions, numerical simulation results are included that validate the effectiveness of the proposed scheme both in terms of transient response to changes in set points and in tracking variable speed references.