Motor rotor and motor

Abstract

The motor rotor comprises a rotor core, a plurality of permanent magnets and a plurality of conducting bars, the rotor core is provided with a plurality of magnetic steel grooves, the plurality of magnetic steel grooves are distributed at intervals along the circumferential direction of the rotor core, the two ends of each magnetic steel groove are respectively provided with a magnetic isolation groove, the plurality of permanent magnets are respectively arranged in each magnetic steel groove, and the plurality of conducting bars are arranged in the magnetic isolation grooves. The plurality of conducting bars are respectively arranged in the magnetic isolation grooves. The conducting bars are respectively arranged at the two end parts of the permanent magnet, so that an eddy current generation area is mainly concentrated in the conducting bars under the common action of a skin effect and a proximity effect when the motor operates to generate high-frequency current harmonic waves, the permanent magnet eddy current loss of the motor rotor can be reduced, the temperature of the permanent magnet is reduced under the same working condition, and the service life of the motor rotor is prolonged. Therefore, the demagnetization risk of the permanent magnet synchronous motor can be reduced, the motor efficiency can be improved, and the permanent magnet consumption or the permanent magnet mark can be reduced on the premise of meeting the same working condition, so that the motor cost is reduced.