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:
Dec. 15, 2015
Filed:
Jan. 25, 2012
Applicants:
HU LI, Osaka, JP;
Yuichi Yoshikawa, Osaka, JP;
Yuichiro Tashiro, Osaka, JP;
Hideaki Matsuo, Osaka, JP;
Inventors:
Hu Li, Osaka, JP;
Yuichi Yoshikawa, Osaka, JP;
Yuichiro Tashiro, Osaka, JP;
Hideaki Matsuo, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 21/12 (2006.01); H02K 1/22 (2006.01); H02K 1/27 (2006.01); H02K 29/03 (2006.01); H02K 1/14 (2006.01);
U.S. Cl.
CPC ...
H02K 1/22 (2013.01); H02K 1/276 (2013.01); H02K 29/03 (2013.01); H02K 1/146 (2013.01); H02K 2201/03 (2013.01); H02K 2213/03 (2013.01);
Abstract
A brushless motor capable of high speed rotation by field weakening operation is designed to reduce torque ripple at a maximum load point with current phase advance so that the torque ripple at the maximum load point is 1 to 1.5 times the torque ripple at a low speed load point.