US 11,942,822 B2
Stator tooth and winding conductor designs for electric machines
Mohammad F. Momen, Rochester Hills, MI (US); and Edward L. Kaiser, Orion, MI (US)
Assigned to GM Global Technology Operations LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Dec. 23, 2021, as Appl. No. 17/560,404.
Prior Publication US 2023/0208216 A1, Jun. 29, 2023
Int. Cl. H02K 1/16 (2006.01); B60K 1/00 (2006.01); H02K 1/276 (2022.01); H02K 7/00 (2006.01); H02K 21/14 (2006.01)
CPC H02K 1/165 (2013.01) [B60K 1/00 (2013.01); H02K 1/276 (2013.01); H02K 7/006 (2013.01); H02K 21/14 (2013.01); H02K 2201/03 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electric machine comprising:
a housing;
a rotor assembly rotatably attached to the housing, the rotor assembly including a rotor core and a magnet mounted to the rotor core; and
a stator assembly coaxial with and separated by an airgap from the rotor assembly, the stator assembly including a stator core defining a plurality of circumferentially spaced stator slots, a plurality of radially aligned stator teeth separating the stator slots, and a plurality of electromagnetic windings located in the stator slots, each of the stator teeth having an elongated tooth body with a tooth head at a radial end of the tooth body, the tooth head having an axial cross-section with a trapezoidal crown integral with a rectangular tip, the trapezoidal crown having an isosceles trapezium shape with a narrow edge, a wide edge parallel to and wider than the narrow edge, and a pair of angled edges oblique with and connecting the wide and narrow edges, the narrow edge of the trapezoidal crown facing the airgap.