Laminate structure of stator iron core of motor

Abstract

The invention discloses a laminate structure of a stator iron core of a motor, which relates to the field of the motors and aims at solving the problems of the large harmonic wave and the high noise of the motors and the bad concentricity and the bad axiality of a stator. The laminate structure of the stator iron core of the motor is formed by splicing a stator yoke part (1) and a plurality of stator teeth (2); the stator yoke part (1) is annular; the stator teeth (2) are formed into a whole made of one material; the inner edges of the stator teeth (2) are round; the outer ends of the stator teeth (2) are embedded at the annular inner side of the stator yoke part (1) to form one stator iron core laminate; and a plurality of the stator iron core laminates are laminated to form a whole stator iron core. Preferably, the single stator tooth (2) is T-shaped, and two sides of the inner end of the single stator tooth are provided with flanks (3). By using the laminate structure of the stator iron core of the motor, a combined closed slot structure needed by a centralized winding is easy to achieve; the integral concentricity and the axiality of a stator laminate and the precision of an inner circle and an outer circle are guaranteed; the efficiency of the motor is improved; the harmonic wave is small; the noise is low; and the consistency of products is good. The laminate structure of the stator iron core of the motor is applicable to various motors, in particular to the motors used by new-energy-source automobiles.

Description

technical field [0001] The invention relates to the field of motors, in particular to a lamination structure of a motor stator iron core. Background technique [0002] The existing motor stator structure can be divided into a distributed winding stator and a concentrated winding stator according to the winding structure. The stator core structure of the distributed winding has complex wire embedding process, the winding span is large, the winding end is large, and the length of the motor is also large; the segmented stator core structure of the centralized winding has a simple winding process and the winding end The length is very short, and closed slots can be realized, which can effectively reduce harmonics, reduce vibration noise and volume of the motor. [0003] For electric vehicles and hybrid vehicles, the space requirements of the motor are relatively strict, and the stator structure of the centralized winding is more suitable. Generally, the wound segmented laminate...

AI Technical Summary

Problems solved by technology

However, for good heat dissipation and convenient processing, the motor shell is generally made of soft materials such as aluminum alloy, and most of them have heat dissipation structures such as oil passages and water channels inside, and the structural strength is relatively poor, which causes the following shortcomings:

[0004] 1. The stator itself is complex, and the matching accuracy is not high. When it is fitted to the inner ring of the motor casing, it is easy to cause its own roundness to be insufficient. The segmented arcs are not concentric. Non-coincidence will eventually cause uneven air gaps between the stator and rotor, affecting the symmetry of the magnetic circuit, thus affecting the efficiency of the motor, heating of the motor, large harmonics, and high noise;

[0005] 2. Errors are likely to occur when each segment of the stator core is laminated. After splicing, the inner and outer circles of the end faces of both ends are uneven, and magnetic flux leakage occurs, which affects the efficiency of the motor;

[0006] 3. At the same time, the vehicle is used under the conditions of frequent vibrations and large temperature differences in various seasons and regions. The mechanical errors on the motor will cause greater deformation due to vibration or thermal expansion and contraction in practical applications.

[0007] 4. Each segment of the stator core on the circumference needs to be wound separately, and the production efficiency is relatively low

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