Disk pack drive with electric motor having sintered permanent ma

Details Disk pack drive with electric motor having sintered permanent ma Disk pack drive with electric motor having sintered permanent ma

1986-09-18

1989-04-04

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9908, 360133, G11B 5012

Patent

active

048191043

ABSTRACT:
A low-cost, compact disk pack drive with an external rotor motor permanent magnet-excited by sintered ferrite magnets in the form of partial shells is to be provided. The external rotor motor is arranged inside the pack space of the disk pack and sintered ferrite excitation magnets are used, having a surface metallization which have been sealed.

REFERENCES:
patent: 3974406 (1976-08-01), Wehde
patent: 4311933 (1982-01-01), Riggs et al.
patent: 4535373 (1985-08-01), Schuh
Patents Abstracts of Japan, vol. 6, Nr. 182 (E-131) [1060], 18, Sep. 1982; & JP-A-57 97 354 (Hitachi).

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