Method and apparatus for monitoring torsional vibration in the r

Details Method and apparatus for monitoring torsional vibration in the r Method and apparatus for monitoring torsional vibration in the r

1979-10-19

1981-12-01

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

322 25, 322 99, 361 20, G01R 3100, G08B 2100, H02H 706

Patent

active

043038824

ABSTRACT:
Apparatus and method for monitoring torsional vibration in the rotor of a dynamoelectric machine by detecting electrical quantities available at the output terminals of the machine. For at least one phase of the machine, output voltage and current are detected and a composite signal is formed therefrom in signal processing circuitry. The composite signal is in synchronous phase with the mechanical angle of the rotor and may be demodulated to obtain the torsional vibration information.

REFERENCES:
patent: 3885420 (1975-05-01), Wolfinger
patent: 3934459 (1976-01-01), Wolfinger
patent: 4121272 (1978-10-01), Wolfinger
patent: 4148222 (1979-04-01), Wolfinger

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