DocumentCode :
2111181
Title :
Effect of load on detecting mechanical faults in small induction motors
Author :
Obaid, Ramzy R. ; Habetler, Thomas G.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
fYear :
2003
fDate :
24-26 Aug. 2003
Firstpage :
307
Lastpage :
311
Abstract :
Mechanical conditions, such as load unbalance and shaft misalignment in induction motors can be detected by monitoring specific components in the stator current frequency spectrum. Previous work tested these mechanical conditions for the cases of no-load and full-load conditions in small induction motors, assuming that the effect of load on the detection scheme between these two conditions is linear. This paper examines the effect of changing the load of the motor on detecting these mechanical conditions in both the current and vibration spectra. The paper shows that the spectral components associated with mechanical conditions do not always linearly change as the load varies. It shows that other factors, such as mechanical resonance in the coupled systems, affect these spectral components. Experimental results for testing different types of mechanical faults, with the load changing from no-load to full-load, are shown.
Keywords :
electric current measurement; fault diagnosis; induction motors; load (electric); machine testing; monitoring; spectral analysis; stators; vibration measurement; coupled systems; current spectra; full-load condition; load changing; load effect; load unbalance; mechanical conditions; mechanical faults; mechanical faults detection; mechanical resonance; motor load changing; no-load condition; shaft misalignment; small induction motors; specific components monitoring; spectral components; stator current frequency spectrum; vibration spectra; Condition monitoring; Couplings; Fault detection; Frequency; Induction motors; Resonance; Shafts; Stators; Testing; Vibrations;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Diagnostics for Electric Machines, Power Electronics and Drives, 2003. SDEMPED 2003. 4th IEEE International Symposium on
Print_ISBN :
0-7803-7838-5
Type :
conf
DOI :
10.1109/DEMPED.2003.1234591
Filename :
1234591
Link To Document :
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