Proactive motor monitoring for avoiding premature failures and for fault recognition
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United States of America Patent
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Oct 21, 1997
Grant Date -
N/A
app pub date -
Oct 7, 1994
filing date -
Oct 7, 1994
priority date (Note) -
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Importance
Abstract
Apparatus which automates the collection of motor temperature, flux and shaft current data for proactive motor maintenance. Motor speed is determined by an analysis of the flux frequency spectrum, and motor load is determined based on speed, from which a normalized thermal parameter is then determined. From a spectrum analysis of magnetic flux signals a set of peaks each characterized by a frequency and an amplitude is found, and a subset of peaks is identified in accordance with predetermined identity criteria for purposes of comparison. Temperature, magnetic flux and shaft current data are trended to provide early indications of degradation, as well as for recognizing faults.
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