Motor Stator And Manufacturing Method

Abstract

A motor stator and a manufacturing method thereof are provided, in order to solve the problem of high motor stator manufacturing cost. The method for manufacturing a motor stator includes the following steps: providing a core bar having a plurality of connected core units; winding a plurality of coils of a coil group respectively on the plurality of core units; bending the core strip into a core ring; and welding both ends of the core strip with laser, so that the core ring is fixed in a ring shape to form a motor stator.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a motor stator and a manufacturing method thereof. Background technique [0002] At present, the common motor stators on the market can be roughly divided into the stator of the outer rotor motor and the stator of the inner rotor motor; among them, the manufacturing process and structural composition of the stator of the inner rotor motor and the stator of the outer rotor motor are roughly the same, and the inner rotor motor is as follows Take the stator of the motor as an example to illustrate the current manufacturing method and structure of the motor stator. [0003] Please refer to figure 1 , the existing manufacturing method of the motor stator 9 generally includes the following steps: forming a plurality of annular silicon steel sheet rings 91 in a stamping manner in advance, and stacking and combining the plurality of silicon steel sheet rings 91 into a stator iron sheet w...

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Problems solved by technology

[0004] However, in the process of punching and forming the plurality of silicon steel sheet rings 91, the metal sheet material band will become waste in the middle and outer periphery of each silicon steel sheet ring 91 due to each stamping; 91’s metal strips have a reasonable spacing, and the proportion of waste is as high as about 70%, which leads to waste of materials and difficulty in reducing manufacturing costs.

[0005] In addition, especially when manufacturing the motor stator 9 for an inner rotor motor, since the stator core 92 has an annular yoke 921 and a plurality of teeth 922 extending from the inner edge of the yoke 921 toward the center, Moreover, a boot 923 is formed at the end of each tooth 922, so the stator core 92 must maintain a sufficient gap between any two adjacent boots 923, so as to ensure that the mold, winding machine and other devices can smoothly carry out the winding operation. However, this winding operation is still not easy to carry out, not only the winding hours are long, but also the situation of accidentally scratching the coil group 94 often occurs in the winding process

Therefore, due to the high difficulty of winding operation, it is almost impossible to increase the number of teeth 922 of the stator core 92 without increasing the size of the stator core 92, and naturally it is difficult to increase the torque and rotational speed of the motor.

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