Magnetic circuit of a coil motor

Details Magnetic circuit of a coil motor Magnetic circuit of a coil motor

1995-12-15

1998-10-13

Renner, Craig A.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 9703, G11B 555, G11B 3314

Patent

active

058221565

ABSTRACT:
A magnetic circuit for a voice coil motor includes a yoke for guiding a magnetic flux, a permanent magnet magnetically detachably mounted upon the yoke for creating the magnetic flux, and a coil provided in correspondence to a magnetic gap formed by the yoke. The coil interlinks with the magnetic flux and is movable along the yoke. The yoke carries a projection, on a surface thereof on which the permanent magnet is mounted. The projection inhibits movement of the permanent magnet along the surface of the yoke. The permanent magnet is detachably mounted upon the surface of the yoke exclusively by a magnetic force associated with the magnetic flux of the permanent magnet.

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patent: 5128818 (1992-07-01), Koizumi et al.
patent: 5448437 (1995-09-01), Katahara
"Flat Pole Swing Arm Actuator", IBM Technical Disclosure Bulletin, vol. 28, No. 7, Dec. 1985, (3601106).

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