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A sensorless speed estimation method for real-time application in induction motor drives under steady-state condition is proposed. Speed harmonic component in the space vector angular fluctuation (SVAF) signal, which is caused by both dynamic and static eccentricity, is used for speed estimation. The SVAF signal is obtained from the stator currents of the induction motor. The extraction of speed information using digital signal processing techniques is considered. Experimental results are given to demonstrate the validity of the speed estimation method on an induction motor driven by an inverter.
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Müslüm Arkan (2008) studied this question.
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