Title :
Sensorless detection of rotor-cage-defects for inverter fed induction motors
Author :
Blattner, J. ; Gutt, H.-J. ; Schlecter, V.
Author_Institution :
Inst. of Electr. Machines & Drives, Stuttgart Univ., Germany
fDate :
31 Aug-4 Sep 1998
Abstract :
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
Keywords :
fault diagnosis; harmonic analysis; machine testing; machine theory; rotors; squirrel cage motors; core currents; current spectrum; field harmonics; harmonic analysis; inverter fed induction motors; machine model; rotor-cage-defects; second order effects; sensorless fault detection; squirrel cage induction motors; torque ripple; voltage harmonics; Costs; Current measurement; Frequency; Induction motors; Inverters; Magnetic field measurement; Neural networks; Rotors; Stators; Torque measurement;
Conference_Titel :
Industrial Electronics Society, 1998. IECON '98. Proceedings of the 24th Annual Conference of the IEEE
Conference_Location :
Aachen
Print_ISBN :
0-7803-4503-7
DOI :
10.1109/IECON.1998.724082
