Design of a dual-rotor dual-flux-switching motor

Abstract

Permanent magnet (PM) machines play a pivotal role in modern electromechanical systems due to the superior power density and reliability. However, traditional single-rotor topologies struggle to meet the demands of complex applications requiring multi-degree-of-freedom control. Dual-rotor machines enable independent control of dual-rotation systems while expanding the speed range. This paper proposes a novel dual-rotor dual flux-switching permanent magnet motor. The key is to adopt simple FS structures for both inner and outer rotors, incorporates concentrated windings and inter-slot tangential PMs, hence achieving effective magnetic circuit segmentation to suppress torque ripple. Finite Element Method (FEM) analysis confirms that the structure exhibits high torque density, robust mechanical integrity, and low torque ripple. Furthermore, multi-objective optimization via a genetic algorithm is implemented to further improve the system's torque density, providing an innovative solution for high performance applications under complex operating conditions.