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:
Jan. 20, 2009
Filed:
Jan. 30, 2007
Robert T Dawsey, Torrance, CA (US);
Constantin C. Stancu, Anaheim, CA (US);
Eric R. Ostrom, Bellflower, CA (US);
Young Doo, La Palma, CA (US);
Robert T Dawsey, Torrance, CA (US);
Constantin C. Stancu, Anaheim, CA (US);
Eric R. Ostrom, Bellflower, CA (US);
Young Doo, La Palma, CA (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A rotor for an interior permanent magnet machine has a rotor body having an output shaft and a first cavity filled with magnetic material. Second cavities are disposed inboard of the first cavities and are not filled with magnetic material. Non-magnetic rods extend through the second cavities and protrude beyond end faces of the rotor body. The rods are press-fit in blind bores formed in non-magnetic end plates disposed adjacent the end faces of the rotor body. Shrink disks are shrunk around projecting ends of the output shaft in abutting relation with the end plates. In order to prevent induced voltage from generating current in the cage formed by the rods and end plates, an oxide layer is disposed between the rods and blind bores in the end plates.