Research on A High Torque Density Axial-Radial Flux Permanent Magnet Machine to Avoid Stator Axial Movement

The axial-radial flux permanent magnet machine (ARFPMM) has attracted widespread attention due to its high torque density. However, the stator of traditional ARFPMMs suffers from axial movement and low magnetic permeability, which limits the performance improvement of the machine. In order to overcome these issues, this paper proposes a novel ARFPMM design with a stator made of modular spliced structures using silicon steel sheets. The proposed ARFPMM effectively avoids axial movement of the stator and possesses advantages such as high mechanical strength and strong magnetic permeability. The magnetic coupling and vital structural parameters of the ARFPMM are studied. Followed by a comprehensive comparison is made with traditional ARFPMM. Detailed mechanical design is introduced, and the strength of the machine is further analyzed. Finally, the proposed ARFPMM prototype is manufactured, and the superiority of the ARFPMM is verified through experiments.