Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1989-11-14
1990-10-23
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
73659, 318490, G01R 2300, G01R 3102
Patent
active
049655132
ABSTRACT:
A motor current noise signature analysis method and apparatus for remotely monitoring the operating characteristics of an electric motor-operated device such as a motor-operated valve. Frequency domain signal analysis techniques are applied to a conditioned motor current signal to distinctly identify various operating parameters of the motor driven device from the motor current signature. The signature may be recorded and compared with subsequent signatures to detect operating abnormalities and degradation of the device. This diagnostic method does not require special equipment to be installed on the motor-operated device, and the current sensing may be performed at remote control locations, e.g., where the motor-operated devices are used in accessible or hostile environments.
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Eissenberg David M.
Haynes Howard D.
Burns W.
Eisenzopf Reinhard J.
Martin Marietta Energy Systems Inc.
Spicer J. M.
Winchell Bruce M.
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