Patent ID: 11942822
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 14:
15. A motor vehicle, comprising:
a vehicle body;
multiple drive wheels mounted to the vehicle body; and
a traction motor mounted to the vehicle body and operable to drive one or more of the drive wheels to thereby propel the motor vehicle, the traction motor including:
a motor housing;
a rotor assembly rotatably attached to the motor housing, the rotor assembly including a cylindrical rotor core defining a plurality of rotor slots, a rotor shaft attached to and projecting axially from the rotor core, and a plurality of permanent magnets nested inside the rotor slots of the rotor core; and
a stator assembly concentric with and separated by an airgap from the rotor assembly, the stator assembly including a cylindrical stator core defining therein a plurality of circumferentially spaced stator slots, a plurality of radially aligned stator teeth separating the stator slots, and a plurality of electromagnetic windings wound through each of 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 parallel to a wide edge, the narrow edge facing the airgap.