An Adaptive Active Disturbance Rejection Control Strategy for Speed-Sensorless Induction Motor Drives

To address these, an adaptive active disturbance rejection control (ADRC) strategy is proposed for speed-sensorless induction motor drives in this article. In this scheme, a third-order adaptive ESO (AESO) is first used to estimate the speed, the phase, and the overall disturbance. Then, a speed controller based on the state error feedback control rate (SEFCR) is designed to improve system dynamics. In practice, disturbances like dc offsets may further challenge estimation performance, and hence, a closed-loop flux observer (CLFO) is employed to deal with this issue. Additionally, a parameter sensitivity analysis of the CLFO is also provided to evaluate the performance of the proposed scheme.

Index Terms— Adaptive active disturbance rejection control (ADRC), induction motor drives, speed estimation scheme, state error feedback control rate (SEFCR), third-order adaptive extended state observer (AESO).