Speed fluctuation suppression of PMSM using active disturbance rejection and feedback compensation control

Abstract

AbstractThis study proposes the active disturbance rejection control (ADRC) and feedback compensation control method that can solve the speed fluctuation problem of permanent magnet synchronous motors resulting from parameter variation and load disturbance. First, the influencing factors of speed fluctuation are analysed on the basis of a speed analytical model, and a motor robust control system is established. Second, the ADRC method is introduced to establish current controllers in accordance with the state equation for voltage output. The shuffled frog leaping algorithm is also used to automatically optimize the adjustable parameters of the active disturbance rejection controller and to improve the system robustness when the parameters vary. Third, a feedback compensation control method based on the electromagnetic torque observer is introduced to compensate for the q‐axis current in real time. The speed fluctuation caused by load disturbance is also suppressed. Lastly, the validity and feasibility of the proposed method are verified through experiments.