Rotor core, rotor assembly, and motor

Abstract

The application discloses a rotor core, a rotor assembly and a motor, wherein the rotor core comprises a plurality of core units arranged around a rotation axis of the rotor core, one of the core units is a first core unit; the first core unit comprises a plurality of laminations arranged in a direction parallel to the rotation axis, one of the laminations is a first lamination, and the first lamination comprises a first side edge and a second side edge arranged oppositely in a circumferential direction of the rotation axis; one end of the first side edge close to the rotation axis is provided with a first opening, the first lamination is provided with a first through hole, the first through hole penetrates through the first side edge at the first opening, and one end of the first through hole away from the rotation axis is located on a side of the first opening away from the rotation axis in a radial direction perpendicular to the rotation axis. In the scheme, the first through hole is arranged, the distribution of a rotor permanent magnetic field is not affected, and an armature magnetic field can be inhibited. Therefore, the first through hole can inhibit high-frequency noise, and meanwhile, the performance of the motor is not excessively weakened.

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