PROJECT TITLE :

General formulation of winding factor for fractional-slot concentrated winding design

ABSTRACT:

Fractional-slot winding configurations have attracted much attention thanks to the provision of concentrated windings and low cogging torque in permanent magnet brushless motors. For the design of the winding configurations, several style parameters must be determined. The winding factor provides a useful index for the optimal design. But, no general expressions of the winding factor are derived for all the winding configurations. This study performs the general formulation of the winding factor for the fractional-slot targeted windings. The winding issue is redefined for stator windings while not any info of the numbers of poles. For given stator windings, the optimal numbers of poles are determined from the obtained winding factors. The design strategy for the winding configurations is validated through a finite component methodology analysis.