Title :
Stator current harmonics and their causal vibrations: a preliminary investigation of sensorless vibration monitoring applications
Author :
Riley, Caryn M. ; Lin, Brian K. ; Habetler, Thomas G. ; Kliman, Gerald B.
Author_Institution :
Nat. Electr. Energy Testing, Res. & Applications Center, Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
This paper presents an initial study into the relationship between vibration and current harmonics of electric motors, including the effect of externally induced vibrations. This relationship was investigated experimentally on both new motors, on a vibration stand, and a motor with bearing wear. Both theory and experimental results show that a change in the RMS value of the stator current is directly related to the change in vibration magnitude, for a known vibration frequency. The paper shows this result both for a new motor with an externally induced vibration and for a motor with vibration caused by progressive bearing wear
Keywords :
dynamic testing; harmonic analysis; induction motor drives; machine bearings; machine testing; stators; vibration measurement; bearing wear; causal vibrations; current harmonics; externally induced vibrations; induction motor drives; motor current signature analysis; sensorless vibration monitoring; stator current RMS value; stator current harmonics; vibration frequency; vibration magnitude; vibration stand; Circuit faults; Condition monitoring; Electric motors; Frequency; ISO standards; Induction machines; Induction motors; Rotors; Stators; Vibration measurement;
Journal_Title :
Industry Applications, IEEE Transactions on
