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United States Patent Application

View the Complete Application at the US Patent & Trademark Office
A system and method for detecting cavitation in pumps for fixed and variable supply frequency applications is disclosed. The system includes a controller having a processor programmed to repeatedly receive real-time operating current data from a motor driving a pump, generate a current frequency spectrum from the current data, and analyze current data within a pair of signature frequency bands of the current frequency spectrum. The processor is further programmed to repeatedly determine fault signatures as a function of the current data within the pair of signature frequency bands, repeatedly determine fault indices based on the fault signatures and a dynamic reference signature, compare the fault indices to a reference index, and identify a cavitation condition in a pump based on a comparison between the reference index and a current fault index.
Lu, Bin (Kenosha, WI), Sharma, Santosh Kumar (Viman Nagar, IN), Yan, Ting (Brookfield, WI), Dimino, Steven A. (Wauwatosa, WI)
12/ 753,930
April 5, 2010
GOVERNMENT LICENSE RIGHTS [0001] The present invention was made at least in part with Government support under Contract No. DE-FC36-04GO14000, awarded by the United States Department of Energy. The Government may have certain rights in the invention.