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:
Mar. 17, 2009
Filed:
Oct. 31, 2005
Thomas Merlin Jahns, Madison, WI (US);
Mustafa K. Guven, Dunlap, IL (US);
Metin Aydin, Peoria, IL (US);
Ayman Mohamed Fawzi El-refaie, Madison, WI (US);
Seok Hee Han, Madison, WI (US);
Jeihoon Baek, Madison, WI (US);
Thomas Merlin Jahns, Madison, WI (US);
Mustafa K. Guven, Dunlap, IL (US);
Metin Aydin, Peoria, IL (US);
Ayman Mohamed Fawzi EL-Refaie, Madison, WI (US);
Seok Hee Han, Madison, WI (US);
Jeihoon Baek, Madison, WI (US);
Caterpillar Inc., Peoria, IL (US);
Wisconsin Alumni Research Foundation, Madison, WI (US);
Abstract
A rotor for an electric machine includes a rotor core constructed of magnetically-permeable material. The rotor core may include a first cavity having a first curved end portion and a second cavity having a first curved end portion disposed adjacent the first curved end portion of the first cavity. The rotor may also include a permanent-magnet cluster. The permanent-magnet cluster may include a permanent-magnet layer that substantially magnetically isolates a portion of the rotor core disposed inside the permanent-magnet cluster from portions of the rotor core disposed outside the permanent-magnet cluster. The permanent-magnet layer may include one or more permanent-magnet pieces disposed in the first cavity and one or more permanent-magnet pieces disposed in the second cavity.