Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1994-10-07
1997-10-21
Masih, Karen
Electricity: motive power systems
Induction motor systems
Primary circuit control
318471, 318641, 318490, 318430, 361 25, H02P 528
Patent
active
056800258
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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Bowers, III Stewart V.
Davis William A.
Piety Kenneth R.
CSI Technology, Inc.
Masih Karen
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