Getting to know fractional-slot concentrated windings

This paper deals with the winding arrangement of multi-phase fractional-slot permanent magnet synchronous machines , with emphasis on the

Performance of Fractional-Slot Winding PM Machines due to Un-even Coil Turns and Asymmetric Design of Stator Teeth

slot and tab design Such a winding is referred to as a fractional slot winding because the conductors of a single phase occupy a fractional number of slots, for example, slots

slot 898 Since one pole presents 180 electrical space degrees, so the slots pitch corresponding to 18012, , 15° In a fractional pitch