Device for damping the critical frequencies of a rotor...

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

G - Physics

05

D

341/106, 308/2,

G05D 3/00 (2006.01) F16C 32/04 (2006.01) F16C 39/06 (2006.01) H02K 7/09 (2006.01)

Patent

CA 1086842

DEVICE FOR DAMPING THE CRITICAL FREQUENCIES OF A ROTOR SUSPENDED BY A RADIAL ELECTROMAGNETIC BEARING ABSTRACT A rotor is carried by radial electromagnetic bearings each having an associated detecting device which, through a servo-circuit, governs the current to the windings of the bearing to maintain the rotor in a predetermined position. To damp critical frequencies, the servo-circuit includes a selective amplifier of the phase or phase advance gain of the circuit in a narrow band centered on a frequency corresponding to the speed of the rotor. By using conversion circuits slaved to the rotor, the system operates for any rotor speed.

268518

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