Stator punching sheet, stator with stator punching sheet, motor and electrical equipment

Abstract

The invention discloses a stator punching sheet, a stator with the stator punching sheet, a motor and electrical equipment. The stator punching sheet comprises a stator yoke part and N stator tooth parts; each stator tooth part comprises a tooth body, a first pole shoe and a second pole shoe, the projections of the central axis of the stator yoke part and the central line of the tooth body on a first plane are a first point and a first straight line respectively, and the projections of the first pole shoe and the second pole shoe on the first plane are provided with a first peripheral edge, a second peripheral edge, a third peripheral edge and a fourth peripheral edge respectively, the second peripheral edge is located between the first peripheral edge and the stator yoke part, the fourth peripheral edge is located between the third peripheral edge and the stator yoke part, the included angle between the connecting line of the end point of the first peripheral edge and the first point and the first straight line is alpha, the included angle between the connecting line of the end point of the third peripheral edge and the first point and the first straight line is beta, alpha is larger than 0 degree and smaller than 180 degrees / N, and beta is larger than 180 degrees / N and smaller than 360 degrees / N. The stator punching sheet has the advantages of low cogging effect and the like, and the cogging torque, the torque pulsation and the vibration noise of the motor are effectively reduced.

Description

technical field [0001] The invention relates to the field of motors, in particular to a stator punch, and also relates to a stator, a motor and electrical equipment with the stator punch. Background technique [0002] Since the single-phase brushless DC motor in the related art has only one-phase winding, there is a dead point, and the starting performance of the motor is poor. In order to solve this problem, the pole center of the stator and the pole center of the rotor are offset by adopting a gradual air gap or an asymmetric tooth structure, so as to avoid the starting dead point. However, this will increase the cogging effect of the motor, increase the cogging torque and torque ripple, and thus bring about greater vibration and noise problems. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the present invention proposes a stator punching piece and a...

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