Permanent magnet fixing structure, fixing method, permanent magnet motor and vehicle

Abstract

The invention belongs to the field of permanent magnet motors, and provides a permanent magnet fixing structure, a fixing method, a permanent magnet motor and a vehicle. The permanent magnet fixing structure comprises a first cover plate and a second cover plate, and the first cover plate and the second cover plate are used for being fixed to the two ends of a plurality of permanent magnets respectively so as to achieve self-locking of the permanent magnets in the axial direction. And the permanent magnets are sequentially arranged according to the polarity direction of the permanent magnets. The first cover plate and the second cover plate are used for absorbing external force in the manufacturing and application process, the permanent magnet and the surface are effectively protected, the reliability of the permanent magnet motor is improved, the service life of the permanent magnet motor is prolonged, and the product quality is improved.

Description

technical field [0001] The invention belongs to the field of permanent magnet motors, and in particular relates to a permanent magnet fixing structure, a fixing method, a permanent magnet motor and a vehicle. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] At present, permanent magnets are assembled in permanent magnet motors generally in two forms: built-in type and surface type. These two types of permanent magnets are directly fixed in the punching sheet, which is not considered in the manufacturing process of permanent magnet motors. Protection for permanent magnets. [0004] In the production process of the permanent magnet motor, when the permanent magnet is embedded in the center of the iron core, it is necessary to use a non-magnetic through-slot bar to insert the permanent magnet into the iron core. When the iron core of the perm...

AI Technical Summary

Problems solved by technology

When the permanent magnet has many polarities, or there are many axial segments, or the amount of use is large, the method of using the through-slot rod is heavy and the efficiency is very low, and the surface of the permanent magnet is easily damaged by manual hammering on the through-slot rod.

When the axial length of the permanent magnet motor is long, the through-slot rod becomes slender, which is not conducive to the advancement of the permanent magnet. Since the permanent magnet itself is very brittle, the permanent magnet often breaks inside the permanent magnet motor and cannot be taken out. The phenomenon of permanent magnets

Permanent magnet motors are often affected by external mechanical vibrations and shocks during operation. Permanent magnets may also be partially broken under long-term mechanical vibrations and shocks.

[0005] To sum up, the current permanent magnet motors generally have the problem that the permanent magnets are prone to cracking, and the permanent magnet motors whose iron core length is longer than the conventional iron core length have high manufacturability risks.

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