US 12,074,485 B2
Method of making a rotor for an electric machine and system thereof
Alireza Fatemi, Canton, MI (US); Thomas W Nehl, Shelby Township, MI (US); Huaxin Li, Rochester Hills, MI (US); and Anil K Sachdev, Rochester Hills, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Jan. 21, 2022, as Appl. No. 17/648,568.
Prior Publication US 2023/0291288 A1, Sep. 14, 2023
Int. Cl. H02K 15/02 (2006.01); H02K 1/276 (2022.01); H02K 15/03 (2006.01); H02K 15/10 (2006.01); H02K 15/12 (2006.01)
CPC H02K 15/03 (2013.01) [H02K 1/276 (2013.01); H02K 15/12 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of making a rotor for an electric machine, the method comprising:
forming laminations to have internal cavities and structural members adjacent the cavities;
stacking a number of the laminations to form a lamination stack;
applying an alloying material to the lamination stack at the structural members;
placing the lamination stack in a fixture so that an inductor extends along the structural members and cooling elements extend through the cavities; and
applying a current to the inductor to heat the structural members, alloying the alloying material into the structural members.