Motor with rotor magnet thrust bearing

Details Motor with rotor magnet thrust bearing Motor with rotor magnet thrust bearing

1991-06-28

1992-08-25

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 310156, H02K 2114, F16C 3906, F16C 1710

Patent

active

051421763

ABSTRACT:
A motor having a housing, an axle fastened to the housing, a rotation sleeve inserted with a space around the axle to form a dynamic pressure air bearing together with the axle, a magnet fastened to the rotation sleeve, and a stator core fastened to the housing and positioned so that a thrust bearing functions by magnetic attraction force generated between the stator core and the magnet. The stator core includes a protruding portion formed on a surface of the stator core facing magnet; the protruding portion is positioned so that a center line of the protruding portion is shifted from a center line of the stator core, the center line of the protruding portion being shifted from the center line of the stator core in the opposite direction to the gravitational force on the rotation sleeve.

REFERENCES:
patent: 4445056 (1984-04-01), Gaylord
patent: 4820950 (1989-04-01), Hijiya et al.
patent: 4864174 (1989-09-01), Kawamura et al.
patent: 5019738 (1991-05-01), Weilbach et al.

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