Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1990-10-18
1993-10-19
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9807, 310156, G11B 1708, G11B 1702, H02K 2112
Patent
active
RE0344125
ABSTRACT:
A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical air gap. The rotor includes a permanent magnet and a soft magnetic yoke. A hub is provided that is concentric to the yoke and is connected to the rotor for rotation therewith. The hub has a disk mounting portion on its outer peripheral surface that can be passed through the central opening of a standardized storage disk for mounting the storage disks for rotation therewith. At least half of the axial longitudinal dimension of the stator winding and the rotor magnet interacting therewith is housed within the disk mounting portion of the hub. The hub is made from a non-ferromagnetic material that is suitable for storage drive clean chamber use after dimensional finishing of the hub.
REFERENCES:
patent: 4150406 (1979-04-01), Stollorz
patent: 4275339 (1981-06-01), Burke et al.
patent: 4438542 (1984-03-01), Schuh
patent: 4992406 (1990-05-01), Schuh
Elsaesser Dieter
von der Heide Johann
Heinz A. J.
Papst-Motoren GmbH & Co. KG
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