1. When winding the coil, put all the slots of the winding coil together, separate the three windings with insulating paper, and put insulating washers between each winding.

2. The head of the coil should be placed at the top of the winding, and the insulating washer should be placed at the end of each winding.

3. When placing insulating paper, make sure that the insulating paper between each winding stack is placed correctly, and the insulating washers between the three windings should be staggered.

4. After winding, carefully check the coil to ensure that there is no short circuit or open circuit between each winding stack.