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

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 slot angle, rotor construction, and pole-arc coefficient 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 its results agree with the simulation results.