Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-09-07
1996-05-21
Budd, Mark O.
Electrical generator or motor structure
Dynamoelectric
Rotary
384103, H02K 709, F16C 3206
Patent
active
055192742
ABSTRACT:
A foil bearing operable with a magnetic field providing for magnetic suspension of a shaft. In one embodiment, the bearing construction relies upon a plurality of magnetic field generating members arranged to provide a shaft forming space to envelopingly receive the shaft and effectively suspend same in a composite magnetic field. In one embodiment, each of the magnetic field generating member include coils which are energizable with an electric current. In another embodiment, the magnetic field generating members comprise permanent magnets which are used in combination to create the composite magnetic field. A foil is trained about each of the magnetic field generating elements and the foils on each of these elements effectively define the space or cavity which receives the shaft Thus, when the shaft is levitated in the space or cavity by the composite magnetic field, it can function as a rotor and can be caused to rotate through a force applied to the shaft or a housing which receives the shaft. If the magnetic fields should fail or weaken, the shaft is still supported by the foils in the same manner as with foil barings.
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Budd Mark O.
Rotodynamics-Seal Research, Inc.
Schaap Robert J.
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