Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1995-06-20
1997-12-23
Psitos, Aristotelis M.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
360 7303, 360 741, 369 60, G11B 1920
Patent
active
057012849
ABSTRACT:
An apparatus and method for rapidly controlling the disk rotation by detecting a high speed rotation and a reverse rotation of a disk. The disk driving apparatus for controlling rotation of a disk in a normal mode includes a spindle motor for driving the rotation of the disk by a spindle control signal and for generating a spindle driving voltage as the disk rotates, a servo control for generating the spindle control signal of the spindle motor by a servo control signal, a device for converting the spindle driving voltage into digital data, a device for storing a rotation range data table of the spindle driving voltage corresponding to ah abnormal rotation of the disk, and a controller for comparing and analyzing the converted digital data with the rotation range data table, sensing normal and abnormal states, and generating the servo control signal from the sensed results. Upon sensing an abnormal state the controller generates the servo control signal applying a reverse torque to a rotation direction of the spindle motor during a predetermined time, and sequentially performs a stop mode and a normal driving mode.
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United Kingdom Official Search Report, no date.
Faber Alan
Psitos Aristotelis M.
Samsung Electronics Co,. Ltd.
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