Optimized Electromagnetic Parameters of a Six-Phase SPMSM with Fractional-Slot Concentrated Winding for Electric Vehicles

Permanent magnet synchronous motors (PMSMs) are widely utilized in a variety of applications due to their high efficiency, dependability, and exceptional dynamic performance. The increase in the number of phases of the PMSMs is a crucial step forward in improving the motor's overload and fault tolerance. Moreover, the PMSMs with outer rotor are extensively used in traction applications such as ship propulsion, mining, lifting, etc., due to their large torque density, which increases the ability to produce more torque. In this study, a unique optimal design technique with the goals of reducing material cost and boosting efficiency is proposed for a six-phase surface-mounted PMSM (SPMSM). Initially, an analytical model is developed to calculate main dimensions of a 145kW six-phase SPMSM. Next, an optimization process is presented to define optimal electromagnetic parameters of the proposed motor. Once optimal parameters are defined, a finite element approach is presented to simulate and analyze the electromagnetic parameters of the optimal motor. The obtained results after optimization are compared to the traditional motors After optimization, not only the material cost decreases 8USD and the efficiency increases 0.224 %, which achieve the objective functions, but also other output parameters such as back EMF THD, torque ripple, etc., of the optimal motor find better outcomes when compared to the initial model.