Spindle motor with arrangement capable of inhibiting...

Details Spindle motor with arrangement capable of inhibiting... Spindle motor with arrangement capable of inhibiting...

2007-08-07

2007-08-07

Nguyen, Tran (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

Reexamination Certificate

active

11052003

ABSTRACT:
A spindle motor, especially for an optical disc drive, includes a bearing system, a shaft and a magnetic apparatus. The bearing system thereon a radial orientation is defined. The shaft is rotatably inserted into the bearing system and rotates relative to the bearing system during operation of the spindle motor. The magnetic apparatus functions by applying a magnetic force on the shaft, toward the radial orientation of the bearing system, to inhibit a Half-omega whirl (HOW) of the shaft induced during rotation of the shaft relative to the bearing system.

REFERENCES:
patent: 5036235 (1991-07-01), Kleckner
patent: 5304879 (1994-04-01), Suzuki et al.
patent: 5874793 (1999-02-01), Kuwayama et al.
patent: 6215219 (2001-04-01), Hwang
patent: 6307295 (2001-10-01), Murabe et al.
patent: 6501616 (2002-12-01), Neal

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