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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 9329023 B1

PDFFull Text
Date of Patent:
May. 03, 2016

Filed:

Feb. 22, 2013

Rotation control apparatus and method and disk driving apparatus using the same

Applicant:

Rohm Co., Ltd., Kyoto, JP;

Inventors:

Yuji Kunida, Kyoto, JP;

Norihiro Maeda, Kyoto, JP;

Assignee:

Rohm Co., Ltd., Kyoto, JP;

Attorney:

Fish & Richardson P.C.

Primary Examiner:

Dionne H Pendleton

Int. Cl.
CPC ...
H02P 6/18 (2006.01); H02P 3/12 (2006.01); G01B 7/30 (2006.01); G01R 31/34 (2006.01); H02P 27/06 (2006.01); H02P 6/16 (2016.01);
U.S. Cl.
CPC ...
G01B 7/30 (2013.01); G01R 31/34 (2013.01); H02P 6/16 (2013.01); H02P 27/06 (2013.01); H02P 2203/11 (2013.01); H02P 2205/01 (2013.01);
Abstract

A rotation control apparatus includes: a controller configured to supply test currents to a plurality of different paths of a motor when the motor is stopped; and a stop position detector configured to detect a rotational position of the motor based on an order of current values of the test currents. The controller causes one of the test currents to flow through one of the plurality of different paths, measure time taken until the corresponding detection voltage reaches a reference voltage, and set electrical conduction time of the test currents based on a result of the measurement.

Find Patent Forward Citations

Kunida, Yuji. (2016). Rotation control apparatus and method and disk driving apparatus using the same (U.S. Patent No. 9329023). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9329023

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

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