Electric motor with hydrodynamic pressure and magnetic thrust be

Details Electric motor with hydrodynamic pressure and magnetic thrust be Electric motor with hydrodynamic pressure and magnetic thrust be

1983-02-07

1985-08-27

Wong, Peter S.

Electrical generator or motor structure

Dynamoelectric

Rotary

308 10, 310154, 384115, F16C 1716, H02K 709

Patent

active

045380813

ABSTRACT:
In an electric motor unit, a spindle is rotatably supported by bearing sections of a dynamic-pressure type, and is floated along its axis by a magnetic thrust bearing. At the bearing sections, air current layers are formed in the gaps between journals of the spindle and bearings by elongated parallel grooves formed along the axis, and the spindle is supported by pressure distributed over the air current layers. In the thrust bearing, rotor magnets fixed to the spindle are attracted to stator magnets fixed to the housing and surrounding the rotor magnets. The spindle is floated along the axis by the attraction between the magnets.

REFERENCES:
patent: 3612630 (1971-10-01), Rosensweig
patent: 3656819 (1972-04-01), Hirs
Kameyama et al., "Advanced Rotating Mirror Laser Scanner", NHK Labs., Note Ser. 242, 1979.

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