ROTOR, ELECTRIC MOTOR AND ELECTRIC VEHICLE

This application provides a rotor, a motor, and an electric vehicle, to reduce a kinetic energy loss of the motor while implementing effective heat dissipation for the rotor. The rotor includes a rotor iron core and a rotor shaft. The rotor iron core is cylindrical in shape and has a first end and a second end. A fastening plate is fastened to at least one end of the rotor iron core. A through hole and a first runner are disposed in the fastening plate. The first runner is a damping runner. An inlet of the first runner communicates with the through hole, and an outlet of the first runner is disposed on a surface of a circumferential side of the fastening plate. The rotor shaft is securely fitted in the rotor iron core, and at least one end of the rotor shaft extends to the outside of the rotor iron core from the through hole of the fastening plate. A second runner and a third runner are disposed in the rotor shaft, where the second runner is disposed along an axial direction, and the third runner is disposed along a radial direction at least at one of positions corresponding to the through hole. An inlet of the second runner is disposed at one end of the rotor shaft, and an outlet of the second runner communicates with an inlet of the third runner. An outlet of the third runner communicates with the inlet of the first runner.