How to Wind Electric Motor Windings

  Before winding the motor winding, you must know the number of pole-phase groups of the motor winding to be wound. The windings of each pole-phase group should be wound continuously as much as possible, which can reduce the errors of joints and reverse connection of windings. The length of the straight part of the winding extending out of the slot is generally 15mm on each side (it may vary slightly depending on the proficiency of the wire embedding technology. If you are not proficient, you may as well make it slightly longer). There must be no mistakes in the number of turns of the winding, especially for large and medium-sized motors, because the number of turns of the winding directly affects the balance of the three-phase current of the motor.

When winding, install the winding die and partition (the partition should be at least larger than the winding die by the size of the winding) on the main shaft of the hand-cranked winding machine, and clamp the two sides of the wire die and partition with fastening bolts. The wire barrel placed on the winding frame should be able to rotate flexibly and keep a certain distance from the hand-cranked winding machine. There should be a certain tension when the wire passes through the clamping plate into the die groove. Generally, the felt is dipped in paraffin and pressed tightly to make the wire straight without twists. The beginning of the winding is generally hung on the right and wound from the right to the left. Concentric windings are wound from the small winding. The hanging direction of the lead wire is related to the method of embedding the wire. The lead wire is hung on the right to facilitate the handling of the bridge wire. The wires should be arranged neatly in the die groove, with clear layers, and the wires should not be crossed or overlapped.

When the specified number of windings is reached, use yarn to pass through the yarn groove of the clamp to tighten the winding and do not let it loose. Mark the head and tail of the winding respectively, and then cut the wire. The head and tail of the winding should be longer, generally equivalent to about 1/3 of the winding turn, to facilitate the connection of the winding. When the wire is not enough and needs to be connected during winding, the welding point should be selected at the end of the winding, and not at the two sides of the winding (that is, the effective side), otherwise the wire may not be embedded in the slot. Even if it can be embedded in the slot, it is not easy to check and repair once a circuit is broken due to poor welding. The welding point should be covered with a plastic sleeve or a yellow wax tube. For motors with a rated power of more than 4.5kw, after each winding is wound, a plastic sleeve or a yellow wax tube should be put on both ends of the head and tail to avoid difficulty in putting it on after embedding.