Cutlery
Patent
1974-01-14
1978-05-23
Skudy, R.
Cutlery
F16C 3900
Patent
active
040907457
ABSTRACT:
A magnetic bearing assembly for levitating a movable member in either rotation or linear translation comprises a three-loop magnetic circuit in which permanent magnets establish a quiescent or fixed flux across four magnetic gaps arranged to provide restoring forces transverse to the direction of gap flux; the resulting inherent instablity in the longitudinal direction is overcome by an electric feedback control system which supplies control currents in a pair of coils associated with the magnetic gaps for modulating the permanent magnetic flux therein and thereby provides stabilizing longitudinal magnetic forces. The magnetic core, permanent magnet, and coil configuration permits a modification to the electric feedback control system whereby the transverse restoring forces may be controlled to provide transverse stiffness augmentation.
REFERENCES:
patent: 3238788 (1966-03-01), Arthur
patent: 3383141 (1968-05-01), De Bennetot
patent: 3428371 (1969-02-01), Lyman
patent: 3473852 (1969-10-01), Lyman
patent: 3493275 (1970-02-01), Stone
patent: 3650581 (1972-03-01), Boden
patent: 3779618 (1973-12-01), Soglia
patent: 3787100 (1974-01-01), Habermann
P. A. Studer, "Magnetic Bearings for Spacecraft," Jan. 1972, pp. 1-6, Goddard Space F.C.; Greenbelt, Md.
Dohogne James R.
Sabnis Ajit V.
Skudy R.
Sperry Rand Corporation
Terry Howard P.
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