US 11,658,522 B2
Electric machine having magnetically modified region
Feng Liang, Troy, MI (US); Alfredo R. Munoz, Ann Arbor, MI (US); Leyi Zhu, Novi, MI (US); and Michael W. Degner, Novi, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Oct. 13, 2017, as Appl. No. 15/782,888.
Prior Publication US 2019/0115794 A1, Apr. 18, 2019
Int. Cl. H02K 1/14 (2006.01); H02K 1/16 (2006.01); H02K 15/02 (2006.01); H02K 1/02 (2006.01); H02K 1/18 (2006.01); H02K 15/00 (2006.01)
CPC H02K 1/165 (2013.01) [H02K 1/02 (2013.01); H02K 1/148 (2013.01); H02K 1/185 (2013.01); H02K 15/0018 (2013.01); H02K 15/024 (2013.01); H02K 15/026 (2013.01); H02K 2201/15 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A stator for an electric machine, comprising:
a stator yoke having a first inner surface; and
a metal annular tooth member including
a second inner surface being continuous and annular,
a plurality of teeth extending radially outward from the second inner surface and coupled to the first inner surface, and
regions of metal between the teeth, that are integrally formed with the teeth, having a reduced magnetic permeability relative to the teeth to provide a magnetic flux barrier between the teeth, wherein the regions of metal between the teeth include a plastically-deformed region to provide the magnetic flux barrier.