Multiple-Operating-Mode-Based Magnetic-Pole Partitioned Design and Optimization for a Dual Stator Axial Flux Permanent Magnet Motor

This article proposes a magnetic-pole partitioned design concept for an axial flux permanent magnet (AFPM) motor. This concept newly serves as an effective bridge between the two key motor topology design elements of flux focusing and flux regulation. The partitioned magnetic poles play a couple of roles as flux producers and flux regulators, not only realizing high torque but also obtaining a widened speed regulation range with high efficiency. Then, a magnetic-pole partitioned dual stator AFPM (MPDS-AFPM) motor is presented. By considering the multioperating modes, the machine structure and flux regulation principle of the motor are discussed, where the motor can be efficiently designed. In addition, the sensitivity analysis and response surface (RS) evaluation are adopted to pick out the highly sensitive design parameters. Meanwhile, the multioperating mode optimization method with layered multimode weight (LMW) is proposed and conducted. Afterward, the performances of the motor before and after optimization are compared. Finally, a prototype is constructed and tested. Both the theoretical analysis and experimental results verify the effectiveness and reasonability of the proposed design method and the MPDS-AFPM motor.