The high slot full rate proves that the wire diameter is thick. Under the condition of ensuring the cross-sectional area of the main winding, double-wire parallel winding should be adopted as far as possible, so that there is a gap between the wires.

It will be reduced a lot, and the full tank rate will be reduced accordingly. Interlayer insulation must be added, even the thinnest layer of insulating paper. Without interlayer insulation, interphase short circuit is easy to occur.