Magnetic bearing for active centering of a body movable relative

Details Magnetic bearing for active centering of a body movable relative Magnetic bearing for active centering of a body movable relative

1988-03-14

1990-04-17

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

104281, 32420716, F16C 3906

Patent

active

049183451

ABSTRACT:
A magnetic bearing secures active magnetic centering with respect to at least one centering axis of a body movable relative to another a static body. It comprises, on each side of a plane of symmetry perpendicular to the centering axis and containing a reference axis: at least one permanent magnet magnetized parallel to the reference axis, at least one combination comprising a coil wound on a ferromagnetic core disposed to procure a magnetic flux parallel to the reference axis and ferromagnetic members adapted to provide a closed magnetic path for magnetic flux produced by the magnet and the coil via airgaps on the centering axis separating the movable body from the body body. A control circuit comprises a sensor responsive to relative movement between the movable body and the body body along the centering axis and adapted to feed to the coil a current adapted to correct any such relative movement. Two ferromagnetic plates carried by the body body have the magnet and the core clamped between them. A ferromagnetic polepiece carried by the movable body provides a closed magnetic path via the previously mentioned airgaps for the magnetic flux circulating in these ferromagnetic plates.

REFERENCES:
patent: 3741613 (1973-06-01), Pfaler
patent: 3877761 (1975-04-01), Boden
patent: 3955858 (1976-05-01), Poubeau
patent: 3976339 (1976-08-01), Sabnis
patent: 4000929 (1977-01-01), Studer
patent: 4043614 (1977-08-01), Lyman
patent: 4077678 (1978-03-01), Studer
patent: 4285553 (1981-08-01), Robinson
patent: 4294493 (1981-10-01), Sindlinger
patent: 4470644 (1984-09-01), Weisser
patent: 4652780 (1976-03-01), Murakami et al.
"Patent Abstracts of Japan", vol. 7, No. 215, (M-244) [1360], Sep. 22, 1983.

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