Spindle motor having recessed stator coils

Details Spindle motor having recessed stator coils Spindle motor having recessed stator coils

1998-06-11

1999-07-27

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

G11B 1702

Patent

active

059300760

ABSTRACT:
A magnet is provided on the inner circumferential surface of a hub rotatable about a central axis C of the motor, and a stator is arranged inside the inner circumferential surface of the hub to oppose the magnet. The stator core of the stator is formed by stacking substantially annular, plate-shaped core forming members, and has an annular portion arranged to be coaxial with the central axis, a plurality of winding portions projecting from the annular portion radially, and pole portions formed on the extending ends of the respective winding portions and opposing the magnet. Each winding portion is squeezed in the stacking direction by plastic formation such that its thickness is smaller than those of the annular portion and pole portion. A coil is wound on each squeezed winding portion.

REFERENCES:
patent: 3842300 (1974-10-01), Daaykin et al.
patent: 3886383 (1975-05-01), Ross et al.
patent: 5138209 (1992-08-01), Chuta et al.
patent: 5539974 (1996-07-01), Isayama

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