Estimation sensorless vector control of induction drive performance with dynamic resistance tuning

Bharti Yadav, Md. Ashfaque Khan


This paper presents the outcomes of a sensor less indirect stator-flux-oriented control (ISFOC) implementation to an induction motor drive with stator resistance tuning. The estimation of speed and stator resistance is based only on measurement of stator currents. The error of the measured q-axis current from its reference value feeds the proportional plus integral (PI) controller, the output of which provides the estimated slip frequency. Feed forward compensator operates on a Synchronous frame and Owing to its advantages; an IP controller is used for rotor speed regulation.

This work focuses on speed estimation techniques for sensor less closed-loop speed Control of an induction machine based on indirect field-oriented control technique. Details of theories behind the algorithms are stated and their performances are verified by the help of simulation.


Speed estimation, sensor less closed-loop indirect field oriented control (ISFOC), flux estimation, Resistance tuning, Induction motor.


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