Sensorless Field Oriented Control of Doubly Fed Induction Speed Drive

This paper deals with the sensorless rotor field oriented control (SRFOC) of a doubly fed induction machine (DFIM). Two voltage inverters are used to supply the stator and rotor sides. The several variations of the load torque are tested to validate the robust working of this drive. The satisfactory static and dynamic performances of this sensorless DFIM speed drive are obtained in all operating points (low speed, nominal speed and over speed).