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Title: Instrument for analysis of electric motors based on slip-poles component

A new instrument is described for monitoring the condition and speed of an operating electric motor from a remote location. The slip-poles component is derived from a motor current signal. The magnitude of the slip-poles component provides the basis for a motor condition monitor, while the frequency of the slip-poles component provides the basis for a motor speed monitor. The result is a simple-to-understand motor health monitor in an easy-to-use package. Straightforward indications of motor speed, motor running current, motor condition (e.g., rotor bar condition) and synthesized motor sound (audible indication of motor condition) are provided. With the device, a relatively untrained worker can diagnose electric motors in the field without requiring the presence of a trained engineer or technician. 4 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
403651
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States) PTO; SCA: 420200; PA: EDB-97:003818; SN: 96001695578
Patent Number(s):
US 5,578,937/A/
Application Number:
PAN: 8-414,679
Contract Number:
AC05-84OR21400
Resource Relation:
Other Information: PBD: 26 Nov 1996
Research Org:
Lockheed Martin Energy Syst Inc
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; ELECTRIC MOTORS; DIAGNOSTIC TECHNIQUES; MEASURING INSTRUMENTS; DESIGN; REMOTE SENSING; VELOCITY; ELECTRIC CURRENTS; NOISE