BEMF closed loop control of disk drive actuator during a catastrophic event

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United States of America Patent

PATENT NO 9117473
SERIAL NO

14551784

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Abstract

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A disk drive includes an actuator assembly and a controller. The actuator assembly generally includes an actuator having a velocity and a voice coil motor that has a detectable back electromotive force (BEMF). The actuator assembly is configured to position a read/write head. The controller is coupled to the actuator assembly and is configured to detect a catastrophic event occurring within the disk drive. In response to the detection of the catastrophic event, the controller activates a closed loop controlled slowing of the velocity using the detected BEMF as a control parameter.

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Patent Owner(s)

  • SEAGATE TECHNOLOGY LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kinney, Dwight Russell Longmont, US 1 0

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