The AC windings of 72slot 8/10pole motor were analyzed and studied by constructing twodimensional slot number diagram and using the unified design method. Two winding design schemes with higher distribution coefficient for 8 poles were obtained. The fundamental phase bandwidths of the two schemes were 60°/165° and 120°/120°, respectively. The reverse pole changing structure YY/Δ was adopted. After calculating the harmonics of the magnetic potential of the windings, the pitch selection of the two windings and the magnetic potential harmonic analysis were performed, and the optimal scheme with high threephase balance and low harmonics was obtained.