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

Patent · Tue Nov 26 04:00:00 EST 1996

OSTI ID:403651

Haynes, H D; Ayers, C W; Casada, D A

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.

• Research Organization: Lockheed Martin Energy Syst Inc
• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
• Patent Number(s): US 5,578,937/A/
• Application Number: PAN: 8-414,679
• OSTI ID: 403651
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DESIGN
DIAGNOSTIC TECHNIQUES
ELECTRIC CURRENTS
ELECTRIC MOTORS
MEASURING INSTRUMENTS
NOISE
REMOTE SENSING
VELOCITY