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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9355676 B1

PDFFull Text
Date of Patent:
May. 31, 2016

Filed:

Mar. 25, 2015

Data storage device controlling amplitude and phase of driving voltage to generate power from a spindle motor

Applicant:

Western Digital Technologies, Inc., Irvine, CA (US);

Inventors:

Michael Troy Nicholls, Laguna Hills, CA (US);

Joseph J. Crowfoot, Costa Mesa, CA (US);

Assignee:

Western Digital Technologies, Inc., Irvine, CA (US);

Attorney:
Primary Examiner:

Wayne Young

Assistant Examiner:

James L Habermehl

Int. Cl.
CPC ...
G11B 19/20 (2006.01); H02P 3/14 (2006.01); H02P 6/00 (2016.01); G11B 19/04 (2006.01);
U.S. Cl.
CPC ...
G11B 19/2081 (2013.01); G11B 19/047 (2013.01); H02P 3/14 (2013.01); H02P 6/002 (2013.01);
Abstract

A data storage device is disclosed comprising a disk, a spindle motor configured to rotate the disk, wherein the spindle motor comprises a plurality of windings, and a head actuated over the disk. The windings of the spindle motor are commutated based on a commutation sequence while applying a periodic driving voltage to each winding, wherein the periodic driving voltage comprises an operating amplitude during normal operation. When a supply voltage falls below a threshold, the spindle motor is configured into a power generator by at least adjusting the amplitude and a phase of the periodic driving voltage so that a periodic current flowing through each winding is substantially opposite in phase from a sinusoidal back electromotive force (BEMF) voltage generated by each winding.

Find Patent Forward Citations

Nicholls, Michael. (2016). Data storage device controlling amplitude and phase of driving voltage to generate power from a spindle motor (U.S. Patent No. 9355676). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9355676

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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