Electric motor and rotor end ring

• Main Authors: Parrish, Scott E, Yang, Xiaofeng
• Format: Patent
• Language: English
• Published: 07.06.2022
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

An electric motor comprises a housing, a stator mounted stationary within the housing and having end turn windings, a rotatable central shaft, a rotor mounted onto the central shaft for rotation within the stator, the stator, central shaft and rotor all positioned co-axially within the housing, a rotor end ring mounted onto the central shaft adjacent an axial end of the rotor, the rotor end ring including a body, a plurality of outlets adapted to allow coolant to flow from a back side to a face of the body, and a recess formed within the face of the body, wherein coolant flowing through the outlets flows across the recess toward an outer circumference of the body, and the outer circumference of the body is configured to prevent coolant from flowing into a circumferential air gap between the stator and the rotor.