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:
Oct. 01, 2019
Filed:
Dec. 16, 2016
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Chun Tang, Canton, MI (US);
Wei Wu, Northville, MI (US);
Feng Liang, Troy, MI (US);
Michael W. Degner, Novi, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H02K 1/27 (2006.01); H02K 1/14 (2006.01); H02K 3/32 (2006.01);
U.S. Cl.
CPC ...
H02K 1/2706 (2013.01); H02K 1/146 (2013.01); H02K 1/2766 (2013.01); H02K 3/325 (2013.01); H02K 2213/03 (2013.01);
Abstract
An electric machine having a rotor is disclosed. The rotor defines a cavity containing a magnet, an outer periphery, and a top bridge therebetween that includes at least two slots each having a length in a radial direction. A maximum of the lengths is closest to a Q-axis and a minimum of the lengths is closest to a D-axis. As the electric machine is operating, a rate of change in airgap flux density through the top bridge differs.