Rotor, motor and household appliance

Abstract

The invention discloses a rotor, a motor and a household appliance. The rotor comprises a rotating shaft, an iron core, an end ring, a magnet and a shielding part. The iron core is wound on the peripheral wall of the rotating shaft, the end ring is located at one end of the iron core in the axial direction of the rotating shaft, and a groove is formed in the end, away from the iron core, of the end ring. The magnet is mounted in the groove; the shielding part is made of a magnetic conductive material, the shielding part is installed in the groove and located on the side, facing the iron core, of the magnet, and due to the fact that the magnetic conductivity of the shielding part is far larger than that of air, more magnetic lines, penetrating through the groove, of a rotor magnetic field can pass through the shielding part to form a closed loop. Therefore, the influence of the rotor magnetic field on the magnetic field of the magnet is reduced, the interference of harmonic waves on the magnetic field induction device is reduced, the detection precision of the magnetic field induction device on the magnetic field of the magnet is improved, and the speed regulation precision of the motor is improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a rotor, a motor and household appliances. Background technique [0002] The AC motor with PG (Pulse Generator, pulse generator) speed regulation usually has a magnetic ring on the rotor. The magnetic ring is installed at the position of the rotor bearing, and a Hall sensor is arranged above the magnetic ring. The Hall sensor senses the magnetic field of the magnetic ring. Change, obtain the speed signal of the rotor, and then feed the signal back to the whole machine to realize the speed adjustment. However, the axial space occupied by the magnetic ring is relatively large, and the power density of the motor cannot be increased under the condition of a certain installation size limitation. [0003] In the related technology, the magnetic ring is installed on the rotor core to save axial space, but the magnetic field of the rotor will affect the magnetic field distribution of the...

AI Technical Summary

Problems solved by technology

However, the axial space occupied by the magnetic ring is relatively large, and the power density of the motor cannot be improved under certain installation size restrictions.

[0003] In the related technology, the magnetic ring is installed on the rotor core to save axial space, but the magnetic field of the rotor will affect the magnetic field distribution of the magnetic ring, thereby affecting the detection of the magnetic ring magnetic field by the Hall sensor and reducing the speed of the motor. the accuracy of

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