Means for damping mechanical torsional oscillations of an...

Details Means for damping mechanical torsional oscillations of an... Means for damping mechanical torsional oscillations of an...

H - Electricity

02

P

322/15, 321/22

H02P 9/00 (2006.01) H02J 3/24 (2006.01)

Patent

CA 1127708

-1- ABSTRACT OF THE DISCLOSURE For damping torsional oscillations of an electric a.c. generator, a speed-sensing member, for example a tachometer- generator, is connected to the a.c. generator. The speed- dependent signal generated by the speed-sensing member is supplied to a band-pass filter which is adapted to the natural frequency of the torsional oscillations. The output signal of the band pass filter is supplied directly to the control angle determ- ining means of a converter connected to the generator. In this way the power of the converter is modulated in such a way that the oscillations are damped.

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