Monitoring of exciter shaft torsional vibrations
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United States of America Patent
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-
Dec 27, 1988
Grant Date -
N/A
app pub date -
Oct 21, 1987
filing date -
Oct 21, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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