Y 100L2-43kW motor, disassembled and wound, 60 pieces. There are 3 1 1 18 wires in the book. The enameled wire of 3 kW motor winding will not be used very thick. As long as the number of turns of the winding is sufficient and the current-carrying cross-sectional area of the wire diameter is the same, the effect of winding with a single wire is the same. As for the calculation method of changing the four-stage motor into two-stage motor, it is more complicated (the medium-speed motor becomes high-speed after upgrading), which involves the efficiency of the modified motor. The original high-speed motor is not expensive, and whether the mechanical strength of the rotor can withstand high speed depends on the test data. If necessary, it will turn, which is only the basis for changing it to level 4 and changing the series. I hope my answer can help you. Thank you!