Electricity: motive power systems – Positional servo systems – With compensating features
Patent
1979-02-15
1981-12-29
Dobeck, B.
Electricity: motive power systems
Positional servo systems
With compensating features
308 10, G05D 23275
Patent
active
043084907
ABSTRACT:
The invention relates to a device for compensating the gain of a circuit servo-controlling the position of a rotor with the aid of at least one electromagnetic bearing provided with electromagnet windings, from signals delivered by at least one detector detecting the position of the rotor, the servo-control circuit ensuring the control of the supply of the windings in response to the signals delivered by the detectors and comprising an amplification circuit with which is associated a negative current feedback loop, said device further comprising supplementary electrical means for injecting at the input of the amplification circuit a signal depending on the variations in the airgap of the servo-controlled electromagnetic bearing, in a predetermined variation frequency zone. The invention is more particularly applicable to electronic circuits for controlling active electromagnetic bearings.
REFERENCES:
patent: 3100546 (1963-08-01), Cramwinckel
patent: 4037147 (1977-07-01), Smith
patent: 4157536 (1979-06-01), Gauthier
patent: 4157538 (1979-06-01), Simon et al.
Brunet Maurice
Habermann Helmut
Dobeck B.
Societe Europeenne de Propulsion
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