Spindle motor and disk drive having the same

Details Spindle motor and disk drive having the same Spindle motor and disk drive having the same

1993-08-16

1996-05-21

Laballe, Clayton E.

Electrical generator or motor structure

Dynamoelectric

Rotary

310254, 310 43, 360 9807, H02K 714, H02K 112, G11B 1708

Patent

active

055192700

ABSTRACT:
A spindle motor includes a permanent magnet multipolarized in a circular direction of the permanent magnet. The permanent magnet generates magnetic fluxes in a radial direction of the spindle motor. A core assembly has core pieces, the core pieces respectively including first portions are circularly arranged and face the permanent magnet via a gap, and second portions guide magnetic fluxes in parallel with a rotation axis of the spindle motor. Windings are turned around the second portions of the core assembly and have axes of the windings extending in parallel with the rotation axis of the spindle motor. A yoke magnetically couples the core pieces with each other.

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M. Iwana, "Technical Trend in spindle motors for HDD", Denpa Shinbunsha, Sep. 3, 1992.

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