The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 29, 1981
Filed:
Feb. 15, 1979
Helmut Habermann, Vernon, FR;
Maurice Brunet, Vernon, FR;
Societe Europeenne de Propulsion, Puteaux, FR;
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.