Axial magnetic flux hybrid excitation memory motor

Abstract

The invention discloses an axial magnetic flux hybrid excitation memory motor which comprises a stator disc and a rotor disc of a Halbach structure, the stator disc is composed of a stator core and three-phase armature windings, the stator core comprises a stator yoke and stator teeth, a stator groove is formed between every two adjacent stator teeth, and the three-phase armature windings are wound on the stator teeth; the rotor disc meets a Halbach composite array, the outer side of the rotor disc is composed of a plurality of aluminum-nickel-cobalt permanent magnets and a plurality of pulseexcitation windings connected in series, the magnetizing directions of every two adjacent aluminum-nickel-cobalt permanent magnets are opposite, a soft magnetic material is arranged between every twoadjacent aluminum-nickel-cobalt permanent magnets, and the pulse excitation windings are wound on the aluminum-nickel-cobalt permanent magnets; neodymium-iron-boron permanent magnets are attached to the inner side of the rotor disc in a surface-mounted mode at a certain angle, and the magnetizing directions of every two adjacent neodymium-iron-boron permanent magnets are opposite. The motor is compact in structure, can achieve the flexible adjustment of an air-gap magnetic field of the motor, is wider in speed adjusting range, and is low in speed and large in torque.

Description

technical field [0001] The invention relates to an axial flux mixed excitation memory motor, which belongs to the technical field of motors. Background technique [0002] In recent years, with the continuous advancement of science and technology, the performance of permanent magnets made of rare earth materials has been continuously improved. Permanent magnet motors have been greatly sought after because of their high efficiency and high power density. They are widely used in aviation, aerospace, automobiles, etc. fields have been widely used. In real life, the structure of permanent magnet motors is not single. Among all kinds of permanent magnet motors, axial magnetic field permanent magnet motors, also known as disc motors, not only have small size, very compact structure, shaft It has the characteristics of short dimension, high torque density and high efficiency, and has more obvious advantages in some special working environments. Axial field permanent magnet motors ...

AI Technical Summary

Problems solved by technology

[0004] Lin Heyun of Southeast University and others mentioned a surface-mounted permanent magnet memory motor with axial magnetic flux switching in the article "Research Review and Latest Developments of Memory Motors". , and then to control the adjustment of the air gap magnetic field, and this type of motor has the advantages of high back electromotive force sine degree, small positioning torque and torque ripple, high power density and high fault tolerance rate, but due to the use of low coercive force AlNiCo Permanent magnets will cause the maximum air gap flux to fail to reach the required level of NdFeB permanent magnet motors, resulting in a decrease in the overall performance of the motor

[0005] In order to obtain a hybrid permanent magnet memory motor with higher power density, controllable magnetic flux, and excellent heat dissipation performance, the Chinese patent publication number is CN206237285U, and the name is "A Halbach Magnetic Concentration Type Axial Magnetic Field Hybrid Permanent Magnet Motor". A double-stator single-rotor motor structure is proposed, but the double-stator structure is adopted, which makes the motor structure more complicated and the motor as a whole is not compact enough

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