Magnetic bearing element for a rotor shaft using high-T.sub.C su

Details Magnetic bearing element for a rotor shaft using high-T.sub.C su Magnetic bearing element for a rotor shaft using high-T.sub.C su

1994-12-13

1998-01-20

LaBalle, Clayton E.

Electrical generator or motor structure

Dynamoelectric

Rotary

505166, H02K 709

Patent

active

057104697

ABSTRACT:
A magnetic bearing element contains a first bearing part attached to a shaft and a second, fixed-position, bearing part surrounding the first bearing part. One of the bearing parts contains an arrangement of a plurality of alternately polarized permanent magnetic elements between which there are ferromagnetic elements and the other bearing part contains a superconducting structure. This superconducting structure should have grains made of high-T.sub.c superconducting material, whose respective grain size is larger than the thickness of each of the permanent magnetic elements. In addition, the rotor shaft should be made of a non-magnetic material. The rotor shaft may contain the bearing part with permanent magnetic elements or the structure with the high-T.sub.c superconducting material.

REFERENCES:
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Appl. Phys. Lett., vol. 56, No. 4; 22 Jan. 1990, pp. 397-399; F.C. Moion et al.: High-speed rotation of magnets on high T.sub.c superconducting bearings.
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Bornemann et al., Concepts of Flywheels for Energy Storage Usiing Autostable High-Tc Superconducting Magnetic Bearings, Symposium on Magnetic Suspension Technology, pp. 1-15, Aug. 13.
Chen et al., Hybrid High Tc Superconducting Magnetic Bearings for Flywheel Applications, Proceeding of the Sixth U.S./Japan Workshop on High Tc Superconductors, pp. 1-6, Jan. 1994.

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