Speed control of electric drives using Active Disturbance Rejection Control

Electric drives have gained much attention in industrial, servo, speed control applications. These applications require accuracy, robustness and dynamic performances. However, in general these drives suffer with load variations, parameter disturbances that may cause unsatisfactory performance in servo, speed control applications. To resolve above-mentioned issues many control methodologies have been reported and many are in process. However, still they suffer with inferior dynamic performance and further they demand exact mathematical modeling. One of the feasible way to recover from the above problems is usage of Active Disturbance Rejection Control (ADRC), as this control method does not require exact mathematical model and can accurately estimates and eliminates the unknown disturbances in the plant. This paper explores a simulative case study of performances of AC drives i.e.., Permanent Magnet Synchronous Motor (PMSM), Induction Motor (IM) and comparative analysis is done on their time responses for different speed and load torque conditions.