| 摘要 |
A mechanical contact-free bearing system for a rotor, e.g., in a vacuum pump operating on the Holweck principle, rotatable at high speed comprises a magnetic system which includes at least one carrier magnet for suspending the rotor with its axis vertical. The bearing system includes at least one stabilizing device for counteracting and damping gyratory movements, e.g., procession and nutation, of the rotor. The stabilizing device includes sensors for producing signals responsively to deviation of the axis of the rotor from a predetermined position. An electronic control device amplifies the sensor signals and advances them in phase to produce output signals. Electromagnetic means utilize such output signals to apply electromagnetic forces to the rotor to apply correcting lateral forces to the rotor and further forces to anticipate the gyratory effect of such correcting forces and to damp oscillations of the rotor.
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