Example 1. Calculate the pitch factor for the under-given windings: (a) 36 stator slots, 4-poles, coil-span 1 to 8, (b) 72 stator slots, 6 poles, coil span 1 to 10 and (c) 96 stator slots, 6 poles, coil span 1 to 12. Sketch the three coil spans. Solution. (a) here, the coil span falls short by (2/9) x 180 40