Stator punching sheet and electric motor

Abstract

The invention provides a stator punching sheet and an electric motor. The stator punching sheet comprises an annular stator yoke and a plurality of stator teeth connected with the annular stator yoke, wherein the plurality of stator teeth are arranged along a radial direction of the annular stator yoke. Each stator tooth comprises a first tooth boot part and a second tooth boot part, and the first tooth boot part and the second tooth boot part are asymmetrically arranged relative to a central line of the stator tooth. Because the tooth boot parts of each stator tooth of the stator punching sheet adopt an asymmetric structure, magnetic flux can be improved in electric motor rotation processes when output torque of the electric motor is minimum; minimum value of electromagnetic torque of the electric motor can be improved, maximum value of the electromagnetic torque of the electric motor cannot be affected, mean value of the electromagnetic torque can be improved, and the asymmetric tooth boot structure is advantaged by capability of further lowering torque pulsation compared with a symmetric tooth boot structure.

Description

technical field [0001] The invention relates to the field of motors, in particular to a stator punch and a motor. Background technique [0002] In the prior art, trimming of stator teeth is usually used to weaken the harmonics of the air-gap magnetic field, reduce the torque ripple of the motor with concentrated winding structure, and further improve the vibration and noise of the motor. figure 1 A schematic structural view of stator teeth in the prior art is shown, such as figure 1 As shown, the stator punching plate includes an annular stator yoke 1 and stator teeth 2 connected with the annular stator yoke 1, wherein the stator teeth 2 are evenly distributed along the circumference of the inner hole of the stator yoke, and the lower end of the stator teeth 2 (near the inner diameter of the stator) side) extends in the circumferential direction to form a first tooth shoe 3 and a second tooth shoe 4 , and the two are symmetrically mirrored with respect to the centerline 5 o...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a stator punching piece and a motor to solve the problem that when using symmetrical tooth shoes in the prior art, although the air gap flux density harmonics can be weakened, the magnetic flux of the motor is also reduced at the same time, resulting in the output torque of the motor Ability to decrease, which in turn affects the efficiency of the motor

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