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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 9771098 B1

PDFFull Text
Date of Patent:
Sep. 26, 2017

Filed:

Feb. 27, 2015

Motor control device and electric power steering device

Applicant:

Jtekt Corporation, Osaka-shi, Osaka, JP;

Inventors:

Satoru Mikamo, Okazaki, JP;

Ayumi Koike, Takahama, JP;

Assignee:

JTEKT CORPORATION, Osaka, JP;

Attorney:

Oliff PLC

Primary Examiner:

Jerrah Edwards

Assistant Examiner:

Charles J Han

Int. Cl.
CPC ...
B62D 5/04 (2006.01); H02P 21/00 (2016.01); H02P 27/04 (2016.01); B62D 6/00 (2006.01); H02P 27/08 (2006.01); B60L 15/02 (2006.01); B60L 15/20 (2006.01); B60W 10/00 (2006.01); H02M 1/38 (2007.01);
U.S. Cl.
CPC ...
B62D 5/0472 (2013.01); B60L 15/025 (2013.01); B60L 15/20 (2013.01); B60W 10/00 (2013.01); B62D 5/046 (2013.01); H02P 21/00 (2013.01); H02P 21/50 (2016.02); H02P 27/08 (2013.01); B60L 2240/12 (2013.01); B60L 2240/423 (2013.01); B60L 2240/427 (2013.01); B60L 2240/429 (2013.01); B60L 2240/80 (2013.01); B60L 2270/142 (2013.01); B60L 2270/145 (2013.01); H02M 2001/385 (2013.01); Y02T 10/643 (2013.01); Y02T 10/72 (2013.01); Y02T 10/7275 (2013.01);
Abstract

A motor control device includes a motor drive circuit and a microcomputer that controls the drive circuit. The microcomputer generates a control signal on the basis of duty command values Du, Dv, and Dw to control the drive circuit. The microcomputer includes a dead time compensation section that corrects the duty command values Du, Dv, and Dw on the basis of dead time compensation values Ddu, Ddv, and Ddw. The dead time compensation section includes a basic compensation value computation section that computes a basic compensation value Dd as a fundamental value of the dead time compensation values Ddu, Ddv, and Ddw, and a filter section that performs a filtering process corresponding to a low-pass filter on the basic compensation value Dd. The dead time compensation section sets the dead time compensation values Ddu, Ddv, and Ddw on the basis of an output value α from the filter section.

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