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The production process of brushless DC motor can not be separated from the stator winding process. Generally, the selected winding machine equipment is different according to the stator shape, size, slot direction and winding method.

The common stator notches are inward and outward. Many friends with outward notches are also used to calling them outer rotors. In fact, they should be called stators, because they do not move during the operation of the motor. Only when the outer magnetic steel rotates can they be called rotors. Flying fork winding is often used for products with notch outward to solve the winding problem. The specific working principle and winding method are as follows:

Whether it is a brush or a brushless motor, the external winding basically adopts the flying fork winding mode. Brushless generally uses the single flying fork mode. The main machine of the flying fork winding machine includes the frame, motor and control system, wire arrangement device, mold, etc. Under the control of the programmable control system, the machine can realize forward and reverse rotation, start and stop, speed change, automatic wire arrangement and winding, and can also achieve the effect of precise wire arrangement.

The working principle is that there is a wire mouth on the flying fork, the enamelled wire on the wire rack comes out of the wire mouth, and the speed is adjusted by the control system. After the machine is reset, the flying fork part starts to run, which is generally slower at the beginning, and runs forward until the mold tongue contacts a notch in the stator mold part, then snaps into the slot, and continues to move forward. There is a spring behind the mold shed, which can move forward elastically. When the mold tongue reaches the inside of the notch, Start winding, the flying fork rotates at a high speed, and the mold tongue starts to move backward. Under the action of the guard plate and the mold head, the enamelled wire passes through the stator slot gap from the guard plate, moves back and forth with the mold tongue in a circle, and winds in order in the stator slot. After winding a slot, there will be wire passing. Then, start winding the next slot according to the specified procedure. The next slot is not necessarily a slot next to it. It is generally for pole pairing, like brushless motor products, There will be corresponding winding. Of course, different products have different wiring methods. Generally speaking, the speed of this winding method can reach more than 2000RMP, and some can also reach 5000RPM, so the winding speed is relatively fast and the production efficiency is relatively high.