Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1993-07-26
1995-02-21
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9908, 310156, G11B 1702
Patent
active
053921763
ABSTRACT:
A disk drive in which the disk spindle motor for a rotatable recording/reproducing media has a printed circuit stator winding on a printed circuit board within the disk drive housing, fitted between axially spaced circular flanges of a bobbin-shaped motor rotor. Alternately poled, equally circumferential spaced, axial permanent magnet fields between the axially spaced circular flanges link radially disposed printed circuit winding sections. Electronic elements on the printed circuit board are linked internally of the housing with the magnetic head and the actuator motor winding which powers the actuator for moving the magnetic head to different radial locations on the rotatable media. Bi-polar energization of the stator winding of the disk spindle motor is under the control of a commutating circuit controlled by a Hall sensor linked by the axial permanent magnet fields. Motor speed control is achieved by controlling the voltage level of the commutating circuit or by controlling the duty cycle of the voltage coupled to the stator winding. The disk drive design integrates the disk drive housing and the printed circuit assembly and its electronics with the disk spindle motor within the disk drive housing.
REFERENCES:
patent: 4985652 (1991-01-01), Oudet et al.
patent: 5195002 (1993-03-01), Sakurai
patent: 5240003 (1993-08-01), Lancee
patent: 5289069 (1994-02-01), Hasagawa
Heinz A. J.
Hewlett--Packard Company
Oberheim E. F.
LandOfFree
Recording/reproducing device employing device housing and printe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recording/reproducing device employing device housing and printe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recording/reproducing device employing device housing and printe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1935506