Magnetic bearing providing radial and axial load support for a s

Details Magnetic bearing providing radial and axial load support for a s Magnetic bearing providing radial and axial load support for a s

1993-10-14

1996-05-07

LaBalle, Clayton E.

Electrical generator or motor structure

Dynamoelectric

Rotary

H02K 709

Patent

active

055149243

ABSTRACT:
A magnetic bearing utilizes electromagnets together with a permanent magnet to provide controlled radial and axial (thrust) load support of a shaft including a thrust disc, relative to a housing. In one form, the magnetic bearing includes an arcuate ring of high magnetic flux permeability, and a plurality of electromagnet coils circumferentially positioned about the arcuate ring which generate a radially polarized controllable electromagnetic field. A permanent magnet is spaced radially outwardly from the plurality of electromagnet coils and is linked magnetically to the shaft through both a radial air gap and an axial air gap between the housing and the shaft/thrust disc. A pair of electromagnet coils associated with the arcuate ring and circumscribing a portion of the shaft, generate an axially polarized electromagnetic field which links the shaft to the housing through the axial air gap. The magnetic bearing may include one or more arcuate rings which support electromagnetic coils for generating a radially polarized controllable electromagnetic field.

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