Amorphous alloy high-speed outer rotor permanent magnet motor

Abstract

The invention discloses an amorphous alloy high-speed outer rotor permanent magnet motor, which comprises a permanent magnet outer rotor, an amorphous alloy inner stator and an air gap, wherein the outer rotor adopts a three-section Halbach array+combined magnetic pole structure, the maximum magnetic energy product of magnetic steel in the middle of a magnetic pole is larger than that of the same type of magnetic steel which is symmetrical on two sides, and the thickness, the space angle, the magnetizing angle and the coercive force of the magnetic steel are all obtained through optimization so as to ensure that the harmonic distortion rate of no-load air gap flux density of the motor is minimum, and therefore torque fluctuation of the permanent magnet motor is restrained; an iron core of the inner stator is formed by iron-based amorphous alloy strips through overlying and linear cutting so as to reduce high-frequency iron loss; and the cross section of the stator slot wedge is of a special-shaped structure, and protrusions of the cross section in the axial direction of the slot wedge are 0.1-0.2 mm higher than a notch and the parts level with the notches alternately appear, so that the amorphous alloy stator iron core is prevented from being collided by the permanent magnet outer rotor when the motor is assembled or disassembled. The outer rotor high-speed permanent magnet motor is suitable for high-efficiency, high-speed and stable operation occasions.

Description

technical field [0001] The invention relates to the technical field of motor manufacturing, in particular to an amorphous alloy high-speed outer rotor permanent magnet motor. Background technique [0002] In some application fields, high-speed external rotor motors with low loss and low torque fluctuation are required, such as high-speed precision centrifuges or gyro motors. Compared with asynchronous motors, permanent magnet motors have the advantages of small size, light weight, and high efficiency, and are very suitable for high-speed operation. The iron-based amorphous alloy material has the advantages of high magnetic permeability and low AC core loss, especially the high-frequency loss is only less than 10% of the traditional silicon steel sheet, and it can be used in high-speed motors or high-frequency motors with multi-pole pairs. Significantly reduce high frequency core loss. Therefore, the application of iron-based amorphous alloy materials to permanent magnet mo...

AI Technical Summary

Problems solved by technology

Combining two types of permanent magnet materials, NdFeB and ferrite, the difference in mass density between the two materials is relatively large. In the case of accurate processing, due to the symmetry of the structure, there is no dynamic balance problem in the rotor. If the two If there is a deviation in the processing of the circumferential angles of different types of magnetic steel, the rotor will have a serious dynamic balance problem.

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