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.:
Date of Patent:
Jan. 08, 2019
Filed:
Sep. 07, 2016
Applicant:
Nsk Ltd., Tokyo, JP;
Inventor:
Hideyuki Kobayashi, Maebashi, JP;
Assignee:
NSK LTD., Shinagawa-ku, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 21/00 (2016.01); H02P 21/22 (2016.01); B62D 5/04 (2006.01); H02P 21/18 (2016.01); H02P 27/08 (2006.01);
U.S. Cl.
CPC ...
H02P 21/22 (2016.02); B62D 5/0463 (2013.01); H02P 21/18 (2016.02); H02P 21/0003 (2013.01); H02P 27/08 (2013.01);
Abstract
A motor control unit that extracts a higher harmonic component, which is contained in back-EMFs of the dq-axis control system, by means of Taylor expansion (Maclaurin expansion), and suppresses a torque variation by precisely correcting a gain and a phase of the higher harmonic component for a q-axis current command value and the electric power steering apparatus equipped with the same. The motor control unit drives a brushless motor having three or more phases by using a vector control on a dq-axis rotary coordinate system.