Multiobjective Design Optimization of Dual-Stator Unequal-Slot Permanent Magnet Synchronous Motor

Abstract

This article proposes an optimized dual-stator unequal-slot permanent magnet synchronous motor (DSUS-PMSM). An unequal-slot structure has been used, with distributed windings in the outer stator and concentrated windings in the inner stator. The split ratio, stator slot type, skew angle, rotor construction, pole-arc coefficient, and other parameters have been optimized. An optimized motor model has been created, and finite-element analysis is performed. The results show that the proposed motor has a higher power density and can effectively reduce torque ripple and loss. A prototype of the proposed structure has been produced for experimental verification and provides the back electromotive force waveform and structure temperature.