Citation:
Ameur A, Mokhtari B, Mokrani L, Azoui B, Essounbouli N, Hamzaoui A. An improved sliding mode observer for speed sensorless direct torque control of PMSM drive with a three-level NPC inverter based speed and stator resistance estimator. Journal of Electrical EngineeringJOURNAL OF ELECTRICAL ENGINEERING. 2010;10/2010.