An Innovative Design of a Permanent Magnet-Assisted Synchronous Reluctance Motor to Improve Torque Performance for High Speed Applications

This article introduces a novel design for the stator and rotor laminations of a three-phase permanent magnet-assisted synchronous reluctance motor (PMASynRM) to improve torque performance for high-speed applications. The design focuses on optimizing both reluctance torque and magnet alignment torque to achieve maximum torque output. The main innovation of this study is introducing a greater number of rectangular stator slots to increase power density and reduce torque ripples. Furthermore, the novel rotor lamination design incorporates a unique flux barrier to enhance the sinusoidal flux density at the airgap, thereby reducing the cogging torque. This project addresses the challenging task of manufacturing complex rotor and stator laminations through the application of metal additive manufacturing methods. To highlight the benefits of the proposed PMASynRM model, factors such as air gap flux density, output torque, back electromotive force (Back-EMF), saliency ratio, and efficiency are compared to those of a conventional IPM motor using finite element analysis (FEA). The results affirm that the novel PMASynRM demonstrates improved torque profiles, increased power density, and reduced harmonic components in Back-EMF compared to the conventional model.