Three-phase ac induction motor windings in a variety of forms, such as single, double windings, concentrated winding, distribution, concentric windings, concentric is XuanBo winding, winding, the fractional slot winding stack, integer slot winding, the winding, short-range winding, some winding pitch is greater than 1, some winding pitch is equal to 1, the winding form can be used in permanent magnet brushless motor stator winding