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:
Nov. 11, 2014
Filed:
Apr. 17, 2012
Sinisa Jurkovic, Sterling Heights, MI (US);
Khwaja M. Rahman, Troy, MI (US);
Xinyu Zhou, Troy, MI (US);
Xu Han, Novi, MI (US);
Qiang Niu, Novi, MI (US);
Sinisa Jurkovic, Sterling Heights, MI (US);
Khwaja M. Rahman, Troy, MI (US);
Xinyu Zhou, Troy, MI (US);
Xu Han, Novi, MI (US);
Qiang Niu, Novi, MI (US);
GM Global Technology Operations, Detroit, MI (US);
Abstract
A permanent magnet machine is provided with a rotor positioned at least partially within a stator. The rotor includes first and second ring segments oriented axially around a central axis. The rotor defines first and second configurations in the first and second ring segments, respectively. The first configuration is sufficiently different from the second configuration such that torque ripple may be minimized. A first layer of slots, defining a slot outer edge, may be formed in the rotor. In one embodiment, a stator-to-slot gap varies between the first and second ring segments. In another embodiment, a stator-rotor gap varies between the first and second ring segments. In another embodiment, a bridge thickness varies between the first and second ring segments. Thus the rotor exhibits axial asymmetry.