Fixed-time Generalized Active Disturbance Rejection with Quasi-resonant control for PMSM Speed Disturbances Suppression

Robust and smooth speed control is very important for permanent magnet synchronous motor (PMSM) drives. However, aperiodic and periodic disturbances generally exist in PMSM system, which affects the stability of the system and causes speed fluctuations. Therefore, this paper proposes a fixed-time switching generalized active disturbance rejection control method with a switching quasi-resonant controller to achieve satisfactory speed control performance. Firstly, a fixed-time switching generalized extended state observer (FSGESO) whose state estimation errors can converge to steady state in a fixed time is used to suppress the aperiodic disturbances. Secondly, a switching quasi-resonant controller (SQRC) which can avoid the side effect of resonant terms during motor dynamics is designed to attenuate the speed fluctuations caused by the periodic disturbances. Then, the performance of the proposed scheme is systematically analyzed. Finally, the feasibility and effectiveness of the proposed method are verified on a 5.5-kW PMSM experimental platform.