Innovative SynRM Rotor Design for Simplified Construction and Enhanced Mechanical Reliability in High-Speed Applications

This paper presents a novel rotor geometry for high-speed synchronous reluctance motors (SynRM), where the rotor is drawn using a cosine function of the airgap length. This geometry can improve mechanical reliability in high-speed applications, such as in electric vehicles, by eliminating the need for flux barriers and making prototype construction easier. Initially, we present a brief review of the literature on high-speed SynRM, investigating the mechanical issues that might negatively affect their electromagnetic characteristics. After that, we discuss the proposed rotor design methodology. Then, electromagnetic results obtained through the numerical simulation of a 114 kW motor at 12000 rpm are shown, highlighting good torque and power density outcomes.