Sensorless fuzzy sliding mode control for permanent magnet synchronous motor fed by AC/DC/AC converter

In this paper a systematic fuzzy sliding mode controller is presented for permanent magnet synchronous motor (PMSM) sensorless drives. The fuzzy sliding mode controller is designed based on input–output feedback linearization control technique. The extended Kalman filter is used to estimate the speed, position and load torque. The PMSM is fed from indirect power electronics converter. This indirect converter is controlled by the sliding mode technique. This control technique allows the minimization of harmonics introduced by the line converter, including the control of power factor and DC-link voltage. The robustness of the overall system is studied using simulation for different operating modes and varied parameters.