Rotor structure and ultra-low vibration noise permanent magnet motor

Abstract

The invention discloses a rotor structure and an ultra-low vibration noise permanent magnet motor, the rotor structure comprises a rotating shaft, two end plates, a plurality of pressing plates and a plurality of pieces of magnetic steel, the two end plates are spaced along the axial direction of the rotating shaft and are fixedly connected to the rotating shaft, and the plurality of pressing plates are sequentially and fixedly connected to the rotating shaft along the circumferential direction of the rotating shaft. A containing cavity is formed between every two adjacent pressing plates and the rotating shaft, the multiple pieces of magnetic steel are located between the two end plates, and the multiple pieces of magnetic steel are fixedly arranged in the multiple containing cavities in a one-to-one correspondence mode. Each piece of magnetic steel is provided with a first surface and a second surface which are oppositely arranged, the first surface and the second surface are arc-shaped, and a circle where the first surface is located and a circle where the second surface is located are eccentrically arranged; Each piece of magnetic steel comprises a plurality of magnetic steel blocks, the magnetic steel blocks are distributed in an array mode, m rows of magnetic steel blocks are arranged in the circumferential direction of the rotating shaft, n columns of magnetic steel blocks are arranged in the axial direction of the rotating shaft, and m and n are both integers larger than 1. The rotor structure can simulate an ideal magnetic field, and the electromagnetic radial component is reduced by optimizing the sine electromagnetic exciting force so as to reduce vibration and noise.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a rotor structure and an ultra-low vibration and noise permanent magnet motor. Background technique [0002] The low vibration and noise of the motor refers to the ability of the motor to neither radiate low-frequency magnetic fields to the outside, nor to resist external magnetic field interference such as low magnetic fields, when the motor is in a special working environment. Ultra-low vibration and noise motors have higher requirements on mechanical vibration. [0003] At present, low-vibration and noise motors are generally asynchronous motors. Electromagnetic harmonics are optimized by means of magnetic pole optimization, inclined slots, and reasonable slot matching to weaken electromagnetic excitation force and mechanical vibration. For the permanent magnet synchronous motor, there is a strong electromagnetic attraction between the stator and the rotor. The tangential comp...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a rotor structure and an ultra-low vibration and noise permanent magnet motor to solve the problem that there is no ideal ultra-low vibration and noise permanent magnet motor

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