Rotor and motor

The rotor comprises a plurality of stacked rotor punching sheets, the rotor punching sheets are uniformly provided with a plurality of rotor slots and a plurality of rotor teeth along the circumferential direction, the rotor slots are closed slots, the rotor slots comprise first slots and second slots, the first ends of the first slots are close to the axes of the rotor punching sheets, and the second ends of the second slots are close to the axes of the rotor punching sheets. The second end of the first groove is close to the outer edge of the rotor punching sheet; the width of the first groove in the circumferential direction of the rotor punching sheet is gradually increased from the first end to the second end, the symmetry axis of the first groove coincides with the radial direction of the rotor punching sheet, and the second groove is distributed on the side portion of the first groove and connected with the first groove. According to the technical scheme, the NVH problem of the driving system can be so