Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-02-25
1996-07-30
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 90, 310154, 310156, 310268, 310 905, H02K 700
Patent
active
055414605
ABSTRACT:
An apparatus for rotatably journaling a rotor of a spindle motor about a shaft comprising a plurality of annular ring multi-pole magnets, each ring comprised of a plurality of axially aligned magnets whose polarity is alternated along the radius of the ring. The annular ring multi-pole magnets are disposed on both the rotor and stator of a spindle motor in opposition in attraction mode, or a complete offset repulsion mode with like poles facing one another with an full offset, thereby forming a radially stable magnetic bearing for maintaining rotor displacement about a shaft in conjunction with a conventional axial pivot.
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patent: 5126610 (1992-06-01), Fremerey
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patent: 5224782 (1993-07-01), Miwa
"Magnetic Bearing Concepts for Turbomolecular Pumps" by Dantam K. Rao, Precision Magnetic Bearing Systems, Technical Bulletin No. C-1022, Jun. 1993.
Dunfield John C.
Heine Gunter K.
Oveyssi Kamran
Seagate Technology Inc.
Skudy R.
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