Magnetic disk device
By alternately detecting back electromotive force and voltage application during the retraction of the disk drive, and skipping the detection when the head speed deviates from the predetermined range, the problem of large difference between the head speed and the target speed is solved, achieving the effect of quickly approaching the target speed and reducing damage.
CN116778979BActive Publication Date: 2026-07-03KK TOSHIBA +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- KK TOSHIBA
- Filing Date
- 2022-05-25
- Publication Date
- 2026-07-03
Smart Images
Figure CN116778979B_ABST
Abstract
The present invention provides a magnetic disk device capable of quickly approaching a target velocity of a magnetic head in a retreat operation. One embodiment relates to a magnetic disk device including a magnetic disk, a magnetic head, an actuator, a controller, and a ramp. The controller is configured to, in a retreat operation in which the actuator retreats the magnetic head toward the ramp, alternately perform detection of a counter electromotive voltage of the actuator and application of a voltage corresponding to the counter electromotive voltage to the actuator, and skip the detection of the counter electromotive voltage a predetermined number of times in a case where a velocity of the magnetic head deviates from a predetermined range.
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