A High Performance Permanent Magnet Brushless Motor with Cohesive Magnetic Properties

Abstract

The invention discloses a high-performance permanent magnet brushless motor with cohesive magnetic characteristics, which includes a stator assembly, an armature assembly and a rotor assembly. The stator assembly includes a base and a main bearing, and the armature assembly includes an armature skeleton and a ring winding. The rotor assembly includes a rotating shaft, a casing and an annular permanent magnet, and the annular permanent magnet includes a plurality of tile magnets A and a plurality of tile magnets B; for any two adjacent tile magnets A, one of the tile magnets A is filled with The magnetic direction is from the inner arc surface to the outer arc surface, and the magnetization direction of the other tile magnet A is from the outer arc surface to the inner arc surface; the magnetization direction of each tile magnet B is that the connection surface C points to the connection surface D, and the connection The surface C is connected with the tile magnet A whose magnetization direction is that the inner arc surface points to the outer arc surface, and the connection surface D is connected with the tile magnet A whose magnetization direction is that the outer arc surface points to the inner arc surface. The invention can provide larger air gap magnetic density, so that the motor has extremely high output efficiency and power density.

Description

technical field [0001] The invention belongs to the field of permanent magnets, and more specifically relates to a permanent magnet brushless motor. Background technique [0002] With the development of power electronics technology, brushless motors based on electronic commutation are widely used in all aspects of social life, especially permanent magnet brushless motors with ring permanent magnets as magnetic sources due to their high output efficiency, long life, The advantages of various structural forms are favored by engineers in the field of engineering applications. With the continuous advancement of new technologies such as intelligent manufacturing and 5G applications, various fields have put forward higher requirements for the efficiency, volume, life, noise and other performance requirements of permanent magnet brushless motors. Therefore, new motor designs are imminent. [0003] Specifically, in the field of traditional micro motors (in the industry, the rated p...

AI Technical Summary

Problems solved by technology

At present, in terms of improving the magnetic concentration effect of brushless motors, most of them guide the magnetic force lines into the expected "path" by setting the required shape of the magnetic yoke in the magnetic circuit. This magnetic yoke structure is not only structural Complexity also puts forward higher requirements on the theoretical level of designers, which is not conducive to widespread use, and this kind of magnetic yoke also occupies a certain space, which is not conducive to miniaturization

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