Monitoring of exciter shaft torsional vibrations

Details Monitoring of exciter shaft torsional vibrations Monitoring of exciter shaft torsional vibrations

1987-10-21

1988-12-27

Levy, Stewart J.

Measuring and testing

Vibration

Sensing apparatus

73660, G01H 110

Patent

active

047931868

ABSTRACT:
Apparatus and method for detecting torsional vibrations of the shaft of an exciter of a turbine-generator, according to which a permanent magnet generator is connected to be driven by the exciter shaft and has an electrical output for providing an output voltage having a frequency proportional to the rate of rotation of the exciter shaft; and the electrical output is connected to signal processing circuitry serving to derive a signal representative of torsional vibrations experienced by the exciter shaft.

REFERENCES:
patent: 2396540 (1946-03-01), Stansfield
patent: 3885420 (1975-05-01), Wolfinger
patent: 4137780 (1979-02-01), Wolfinger
patent: 4152636 (1979-05-01), Gordon
patent: 4168516 (1979-09-01), Lace
patent: 4317371 (1982-03-01), Wolfinger
patent: 4458536 (1984-07-01), Ahn et al.
patent: 4587436 (1986-05-01), Cronin
Hurley, J. D. et al., "Torsional Monitor Equipment for Turbine Generator Units", Proc. of the Am. Power Conference, vol. 41 (1979).

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