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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 8970139 B1

PDFFull Text
Date of Patent:
Mar. 03, 2015

Filed:

Sep. 20, 2012

Motor drive device, magnetic disk storage device, and electronic apparatus

Applicant:

Rohm Co., Ltd., Kyoto-shi, Kyoto, JP;

Inventor:

Yoshito Otaguro, Kyoto, JP;

Assignee:

Rohm Co., Ltd., , JP;

Attorney:

Cantor Colburn LLP

Primary Examiner:

Erick Glass

Int. Cl.
CPC ...
F04D 15/00 (2006.01); H02K 7/14 (2006.01); G11B 21/12 (2006.01); H02P 3/14 (2006.01); G11B 19/28 (2006.01); H02P 6/00 (2006.01); H02P 6/14 (2006.01);
U.S. Cl.
CPC ...
G11B 21/12 (2013.01); H02P 3/14 (2013.01); G11B 19/28 (2013.01); H02P 6/002 (2013.01); H02P 6/142 (2013.01);
Abstract

A motor drive device has: a power supply line to which a power supply voltage is applied; a ground line to which a ground voltage is applied; and a first motor driver that, when the power supply voltage is normal, rotates an N-phase first motor (where N is an integer of 2 or more) by using the supply voltage and, when the power supply voltage is abnormal, generates a rectified voltage from phase voltages of different phases appearing while the first motor is idling to regenerate the rectified voltage to the power supply line. The first motor driver, when generating the rectified voltage, synchronously rectifies the phase voltages of the different phases according to the results of their comparison with the rectified voltage and the ground voltage. The first motor driver is structured so as to rectify the phase voltages of the different phases synchronously in accordance with results of comparison between the phase voltages of the difference phases, the rectified voltage, and the ground voltage.

Find Patent Forward Citations

Otaguro, Yoshito. (2015). Motor drive device, magnetic disk storage device, and electronic apparatus (U.S. Patent No. 8970139). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8970139

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

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