Robust sensorless of ADRC controlled PMSM based on MRAS with stator resistance identification

In this paper, automatic disturbances rejection controller (ADRC) is employed as controller for speed tracking of permanent magnet synchronous motor (PMSM). Due to the ESO contained in ADRC, it could observe and compensate the interior model disturbance and exterior load disturbance, so the controller provides excellent dynamic response and robust control. Besides, a method based on model reference adaptive system (MRAS) has been developed to estimate the speed and stator resistance simultaneously, of which the estimated speed is used as feedback in the vector controlled system. The inclusion of stator resistance estimation is necessary particularly when the motor is operated at low speed. Theoretical analysis and matlab simulation results have verified the feasibility and effectiveness of the proposed method.