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:
Jun. 30, 2026
Filed:
Nov. 27, 2023
GM Global Technology Operations Llc, Detroit, MI (US);
Alireza Fatemi, Canton, MI (US);
Thomas W. Nehl, Shelby Township, MI (US);
Derek F. Lahr, Howell, MI (US);
Xiaofeng Yang, Troy, MI (US);
Anthony M. Coppola, Rochester Hills, MI (US);
Peng Peng, Columbus, OH (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A rotor for a rotary electric machine incudes an annular stack of rotor lamination layers ('rotor lams') constructed of a magnetic core material. The rotor lams include inner axial surfaces collectively defining a first plurality of openings through the magnetic core material, a second plurality of openings through the magnetic core material, and a third plurality of openings through the magnetic core material. Each respective one of a first plurality permanent magnets, a second plurality of permanent magnets, and a third plurality of permanent magnets, is disposed respectively within a corresponding one of the first plurality of openings, the second plurality of openings, and the third plurality of openings. The first plurality and the third plurality of permanent magnets include high-coercivity magnets. The second plurality of permanent magnets includes low-coercivity magnets.