Dual Stator Winding Induction Machines (DSWIMs) which have two sets of three phase windings with different number of pole pairs and adapt a standard squirrel cage rotor, have overcame the associated problems of Single Winding Induction Machines (SWIMs) operating in very low and zero speed operation regions. Nevertheless, DWSIMs have lower power rating than SWIMs if they use the same stator and rotor frames. In this paper an optimal design procedure is proposed for DSWIMs which benefits the advantages of DSWIMs and surmounts the deration problem as much as possible. In this regard, the optimal flux levels ratio of winding sets and the best pole pair ratio are determined, first. Afterward, the winding specifications are designated to have maximum output power, while the DSWIM advantages especially the zero speed region operation ability, remain valid. A DSWIM is designed, simulated in ANSYS/MAXWELL and fabricated based on the proposed method and utilizing commercially available standard stator and rotor frames. Experimental assessments verify that the DSWIM prototype has improved the deration problem by about 19% in comparison to similar proposed DSWIMs.

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