Stator core, stator comprising stator core and preparation method of stator

Abstract

The invention discloses a stator core, a stator comprising the stator core and a preparation method of the stator. The stator core comprises a plurality of core units, wherein the stator core is formed in the way that the plurality of core units are spliced and enclosed along the circumferential direction of the core units; each core unit comprises a yoke part and a tooth part which extends towards the axis center of the stator core on the yoke part; a splicing protrusion used for splicing and a splicing groove matched with the splicing protrusion are arranged on each yoke part; and the innerwidth and outer width of each tooth part are equal, and after each core unit is spliced with other core units, an open slot stator structure is formed. The stator core is simple in structure, low in cost, convenient to install together with a winding component, high in efficiency and capable of effectively realizing automatic production.

Description

technical field [0001] The invention relates to the field of motors, in particular to a stator core in a motor, a stator including the stator core and a preparation method thereof. Background technique [0002] The structure of the existing brushless DC motor for vacuum cleaners, such as figure 1 As shown, it includes: wind cover, moving impeller, fixed impeller, front end cover, stator and rotor. Among them, the driving unit composed of the stator and the rotor is the core part of the DC brushless motor for the vacuum cleaner. [0003] Such as figure 2 As shown, most of the current motor stators adopt the design of semi-closed slots, and adopt the method of integral blanking, which has the following problems: [0004] 1) The stator core adopts the overall blanking method, and the material utilization rate is low. [0005] 2) Due to the narrow notch, such as figure 2 As shown in the inner hole, the winding must be directly wound on the stator teeth of the stator core ...

AI Technical Summary

Problems solved by technology

[0004] 1) The stator core adopts the overall blanking method, and the material utilization rate is low

[0005] 2) Due to the narrow notch, such as figure 2 As shown in the inner hole, the winding must be directly wound on the stator teeth of the stator core by a special winding machine. Due to the limitation of the process conditions, it is difficult to arrange the enameled wires neatly, which leads to the inability to increase the slot fill rate and slow winding speed. Low production efficiency

[0006] Not only that, the special winding machine needs to slide the enameled wire into the stator teeth through the winding nozzle, winding die and other tooling during the coil winding process, which will damage the paint film and increase the risk of inter-turn short circuit

[0007] 3) Due to the narrow notch, such as Figure 4 As shown, if the winding machine is used to wind the coil first, and then insert the stator teeth of the stator core one by one, the production efficiency is extremely low, the labor intensity is high, and the height of the wire package is relatively high, which takes up a large part of the motor. part of the area, resulting in an increase in the overall size of the motor

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