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Stator punching sheet for permanent-magnet motor and motor stator

A technology of stator punching and permanent magnet motor, which is applied in the direction of electrical components, electromechanical devices, magnetic circuit static parts, etc., can solve the problems of poor manufacturability of stator injection molding, achieve good manufacturability of injection molding, reduce vibration and noise, and improve Effect of Motor Efficiency

Inactive Publication Date: 2017-09-22
GUANGDONG WELLING ELECTRIC MACHINE MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a stator punching sheet for a permanent magnet motor and a motor stator, so as to overcome the problem in the prior art that the stator punching sheet with an arc-cutting structure is formed with poor manufacturability by injection molding

Method used

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  • Stator punching sheet for permanent-magnet motor and motor stator
  • Stator punching sheet for permanent-magnet motor and motor stator
  • Stator punching sheet for permanent-magnet motor and motor stator

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Embodiment Construction

[0025] It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0026] In describing the present invention, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", " The orientation or positional relationship indicated by "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is for convenience only The present invention is described and simplified descriptions do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present invention.

[0027] The invention provides a stator punching sheet for a permanent magnet motor, such as image 3 As shown, the stator punch in...

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PUM

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Abstract

The invention discloses a stator punching sheet for a permanent-magnet motor and a motor stator. The stator punching sheet comprises an annular stator yoke part (1) and a plurality of stator teeth (2), wherein the plurality of stator teeth (2) inwards extend from the stator yoke part (1) in a radial direction, winding grooves (3) are formed among the stator teeth (2), and two ends of a tooth top of each stator tooth (2) are outwards sunken in the radial direction to form a step structure (22). In the stator punching sheet and the motor stator, provided by the invention, the tooth top of each stator tooth is outwards sunken in the radial direction to form the step structure, so that the motor stator can be favorably used for reducing torque ripple and reducing electromagnetic excitation force generated by air gap harmonic magnetic density, and the injection molding performance of the stator can be improved as well as the vibration noise of the motor is further reduced.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a stator punching sheet for a permanent magnet motor and a motor stator. Background technique [0002] At present, for permanent magnet brushless motors (such as permanent magnet brushless motors used in drum washing machines), in order to improve the efficiency of the motor, concentrated windings with fractional slots are often used. The inherent disadvantage of the fractional slot concentrated winding is that the harmonic content of the winding magnetomotive force is relatively large. At present, in order to reduce the air gap flux density harmonics, especially to reduce the flux density harmonics and motor iron loss when the motor is running in a deep field weakening state, the method of stator or rotor arc cutting is often used (that is, the tooth top of the stator or The tooth tip of the rotor is partly cut off compared to the normal structure), so as to reduce the content o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/14H02K29/03
CPCH02K1/14H02K29/03H02K2213/03
Inventor 陈金涛张浩秦向南
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG