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:
May. 19, 2015
Filed:
Aug. 26, 2013
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Feng Liang, Troy, MI (US);
Wei Wu, Canton, MI (US);
Michael W. Degner, Novi, MI (US);
Franco Leonardi, Dearborn Heights, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H02K 21/12 (2006.01); H02K 1/27 (2006.01); H02K 29/03 (2006.01); B60L 11/12 (2006.01); B60L 11/14 (2006.01);
U.S. Cl.
CPC ...
H02K 1/276 (2013.01); H02K 1/2773 (2013.01); H02K 1/2766 (2013.01); H02K 29/03 (2013.01); H02K 2201/06 (2013.01); Y02T 10/641 (2013.01); Y02T 10/7077 (2013.01); H02K 1/27 (2013.01); B60L 11/123 (2013.01); B60L 11/14 (2013.01);
Abstract
An internal permanent magnet machine has multiple rotor sections, each section having multiple rotor laminations. Permanent magnets are placed asymmetrically in lamination openings to attenuate oscillations in torque caused by harmonic components of magnetic flux. Asymmetry is achieved by placing adjacent permanent magnets or magnet sets on the rotor periphery with different rotor magnetic pole arc angles.