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Sensorless detection of rotor-cage-defects for inverter fed induction motors

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3 Author(s)
J. Blattner ; Inst. of Electr. Machines & Drives, Stuttgart Univ., Germany ; H. -J. Gutt ; V. Schlecter

This paper presents a sensorless detection system for cage defects in squirrel cage induction motors. Second order effects, like field and voltage harmonics, core currents and torque ripple caused current sidebands are integrated in a novel machine model for cage defects. In addition, the harmonic analysis displays a way how the machine speed can be calculated out of the current spectrum. The experimental test for inverter fed induction motors of the diagnosis system reveals the ability to diagnose a defective cage

Published in:

Industrial Electronics Society, 1998. IECON '98. Proceedings of the 24th Annual Conference of the IEEE  (Volume:4 )

Date of Conference:

31 Aug-4 Sep 1998