Magnetic bearing back-up

Details Magnetic bearing back-up Magnetic bearing back-up

1993-07-14

1994-09-06

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

384102, H02K 709, F16C 2100

Patent

active

053451279

ABSTRACT:
A magnetic bearing arrangement for a rotatable shaft 11 including electromagnetic journal bearings 20, 21 and electromagnetic thrust bearings 22, 23, is provided with back-up bearings provided as hydrostatic journal bearings 50, 51 and thrust bearings 52, 53. The hydrostatic bearings are energized by controls 63 responsive to detected failure of the magnetic bearing to support the shaft in any particular direction within a permitted range of displacements and supplied with fluid at such pressure to support the shaft on a fluid film at all speeds down to rest. Preferably the fluid is a gas.

REFERENCES:
patent: 4982126 (1991-01-01), Jolivet et al.
patent: 5126641 (1992-06-01), Putman et al.

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