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System and method for bearing fault detection using stator current noise cancellation

United States Patent

7,777,516
August 17, 2010
View the Complete Patent at the US Patent & Trademark Office
A system and method for detecting incipient mechanical motor faults by way of current noise cancellation is disclosed. The system includes a controller configured to detect indicia of incipient mechanical motor faults. The controller further includes a processor programmed to receive a baseline set of current data from an operating motor and define a noise component in the baseline set of current data. The processor is also programmed to repeatedly receive real-time operating current data from the operating motor and remove the noise component from the operating current data in real-time to isolate any fault components present in the operating current data. The processor is then programmed to generate a fault index for the operating current data based on any isolated fault components.
Zhou; Wei (Los Angeles, CA), Lu; Bin (Kenosha, WI), Habetler; Thomas G. (Snellville, GA), Harley; Ronald G. (Lawrenceville, GA), Theisen; Peter J. (West Bend, WI)
Eaton Corporation (Cleveland, OH)
12/ 132,056
June 3, 2008
GOVERNMENT LICENSE RIGHTS The present invention was made at least in part with Government support under Contract No. DE-FC36-04G014000, awarded by the United States Department of Energy. The Government may have certain rights in the invention.