Algebraic Design of Symmetrical Windings for AC Machines

Abstract

This article compares two important methods for the synthesis of the winding layout of ac machines. Both methods apply in general to integral-slot and fractional-slot windings, including nonoverlapping windings so they can both be claimed to unify the synthesis task. Both of them also maximize the winding factor at the working harmonic. This article gives several examples including the calculation of the winding factor by the little-known closed-form expression of Klíma, which also applies in general to the entirety of this class of windings. Exact agreement with the calculation based on the slot-star corroborates the results.