Device for compensating the gain of a servo-controlled circuit by negative current feedback
US4308490A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1979 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Feb 15, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C32/0451
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.