Stator core, stator, motor and air conditioner

Abstract

The invention provides a stator core, a stator, a motor and an air conditioner. The stator core includes a yoke, a plurality of teeth and a plurality of boots, the plurality of teeth are uniformly arranged along the circumference of the yoke, a boot is provided at the end of each tooth away from the yoke, the yoke, the corresponding Stator slots are surrounded by two adjacent teeth and boots located on the two adjacent teeth, and each stator slot is arranged symmetrically with a radial line of the stator as a central axis. The stator slot includes a first side wall, the first side wall is located on the tooth portion, and the included angle between the first side wall and the central axis of the corresponding stator slot is greater than 0 degrees and less than or equal to 15 degrees. The stator iron core can improve the slot area utilization rate, and can improve the stiffness of the stator.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a stator core, a stator, a motor and an air conditioner. Background technique [0002] With the improvement of air conditioner energy efficiency standards and the development trend of miniaturization of air conditioner compressors, for compressors with the same working efficiency, the outer diameter of the motor is required to be smaller and smaller, and the height is lower and lower. To increase the power density of the motor, a larger rotor is required to place more permanent magnets to provide energy. Although the V-shaped arrangement of magnetic steel can be used to increase the amount of permanent magnets under the condition that the outer diameter of the rotor remains unchanged, in order to improve product competitiveness, when the size of the motor is further miniaturized, the arrangement of the rotor is close to the limit, and it is necessary to increase the size of the ro...

AI Technical Summary

Problems solved by technology

[0005] Where Km is the stiffness of the stator, h is the thickness of the yoke, the stiffness of the stator is proportional to the cube of the thickness of the yoke 103, it can be seen that the reduction of the width of the yoke 103 will lead to a significant increase in vibration and noise

[0006] In the prior art, a conductor with a rectangular cross-section or an approximately rectangular cross-section is used instead of a conventional conductor with a circular cross-section to increase the slot fill rate, but the available area of ​​the stator slot is greatly reduced, and at the same time, the conductor winding in the slot cannot be fully Fixed, causing motor performance to deteriorate

And the conductor with rectangular cross-section is an unconventional material, which requires special winding equipment for winding, and the process is difficult

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