Device for damping the critical frequencies of a rotor suspended

Details Device for damping the critical frequencies of a rotor suspended Device for damping the critical frequencies of a rotor suspended

1976-12-17

1978-12-05

Schaefer, Robert K.

Electricity: motive power systems

Positional servo systems

With stabilizing features

318616, 318605, 318637, 318661, 318621, 318622, G05B 501

Patent

active

041287959

ABSTRACT:
A device is disclosed for damping the critical frequencies of a rotor suspended by a radial electromagnetic bearing which has means associated therewith for detecting the radial position of the rotor, comprising a servo-circuit for connection between the detecting means and windings of the electromagnetic bearing and including a circuit for controlling the current supply to the windings in response to signals from the detecting means to keep the rotor in a predetermined radial position. The servo-circuit is provided with means for the selective amplification of the phase advance gain of said circuit in a frequency equal to the speed of rotation of the rotor for damping said critical frequencies.

REFERENCES:
patent: 3428791 (1969-02-01), Chandos
patent: 3460013 (1969-08-01), Gaylor
patent: 3808486 (1974-04-01), Cuda et al.
patent: 3988658 (1976-10-01), Meinke et al.

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