Stator core, motor with stator core and compressor with stator core

Abstract

The invention discloses a stator core and a motor with the stator core and a compressor with the stator core. The stator core comprises a plurality of stator punching sheets, each stator punching sheet comprises a plurality of block tooth yoke parts each provided with a yoke part section and a tooth part, radial parting planes are arranged on the straight lines which passes through the central axes of the stator punching sheets and deflects to the two ends in the circumferential directions of the yoke part sections by the same angle relative to the symmetry plane of the tooth parts, and the end surfaces of the two ends in the circumferential directions of the yoke part sections are parallel to the corresponding radial parting planes. The first end in the two ends in the circumferential directions of the yoke part sections is located between the corresponding radial parting plane and the symmetry plane, and the second end in the two ends in the circumferential directions of the yoke part sections is located on the side, away from the symmetry plane, of the corresponding radial parting plane. The projections, on the plane perpendicular to the central axis of the stator core, of the end surfaces of the two ends in the circumferential directions of at least two yoke part sections in the stator punching sheets do not completely overlap. According to the stator core, convenience is brought to wire wrapping and other operation of the stator core, the overall rigidity of the stator core is improved, the motor efficiency is improved, and noise is reduced.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a stator iron core, a motor and a compressor with the same. Background technique [0002] Permanent magnet synchronous motors are widely used in household appliances such as compressors and blowers for household air conditioners. With the continuous improvement of the country's requirements for energy efficiency levels, the efficiency of motors has also attracted more and more attention. As far as the compressor is concerned, with the miniaturization design trend of the compressor, the efficiency of the motor supporting the compressor is getting higher and higher, and due to the fierce market competition, the cost requirement for the compressor is also getting higher and higher. Specifically, for example, since the motor of the compressor needs to be shrunk with the shell of the compressor, the roundness of the outer diameter of the stator of the motor is required to be high. In ...

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned method of directly dividing into blocks, the assembly between the segmented iron cores will cause a decrease in manufacturing efficiency, and the stiffness of the stator yoke will also decrease compared with the integral stator core.

Moreover, due to the high-frequency operation requirements of the motor, the joints between the various segments of the stator core are connected to each other. When the frequency is high, the stator core will form a large eddy current, thereby reducing the efficiency of the motor.

In addition, due to the existence of the gap near the rotating shaft, there is an additional air gap in the stator yoke, which will cause a decrease in the efficiency of the motor

In addition, due to the need to punch out the rotating shaft and the convex and concave parts on the stator punch, the precision and complexity of the mold are relatively high, and the manufacturing cost increases

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