Uncertainty and Disturbance Estimator Based Control Methodology for Speed Control of PMSM Drives

In this paper, speed control strategy for Permanent magnet synchronous motor (PMSM) drive based on uncertainty and disturbance estimator (UDE) is proposed. Unlike traditional PI controllers, the control strategy designed is robust to internal parameters variations and external torque disturbances. The controller design is insensitive to different uncertainties and tuning of controller parameters is eliminated. MATLAB simulation is presented to demonstrate the tracking and disturbance rejection capability of UDE based speed control strategy of PMSM drive. The control yields satisfactory results for varied types of disturbances.