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:
Feb. 17, 2015
Filed:
Dec. 07, 2011
Khwaja M. Rahman, Troy, MI (US);
Constantin C. Stancu, Torrance, CA (US);
Sinisa Jurkovic, Sterling Heights, MI (US);
Xinyu Zhou, Troy, MI (US);
Qiang Niu, Novi, MI (US);
Xu Han, Novi, MI (US);
Khwaja M. Rahman, Troy, MI (US);
Constantin C. Stancu, Torrance, CA (US);
Sinisa Jurkovic, Sterling Heights, MI (US);
Xinyu Zhou, Troy, MI (US);
Qiang Niu, Novi, MI (US);
Xu Han, Novi, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
An electric machine is provided with a rotor configured to be rotatable within a stator. A first and second tooth are disposed circumferentially along an outer perimeter of the rotor and at least partially define a first slot. The first and the second tooth define a respective first and second outer edge extending between a respective tooth base and a respective tooth tip. An arc radius from the origin to the outer perimeter of the rotor varies along the first outer edge of the first tooth, thereby creating a first non-uniform gap between the rotor and the stator. The arc radius from the origin to the outer perimeter of the rotor varies along the second outer edge of the second tooth, thereby creating a second non-uniform gap between the rotor and the stator. The rotor geometry is configured to reduce torque ripple without skewing either the rotor or the stator.