A Study on Cogging Torque Reduction Design of an Axial Flux Permanent Magnet Synchronous Motor for CNC Machines Using Quasi-3D

This paper focuses on the cogging torque reduction design of an Servo Axial Flux Permanent Magnet Synchronous Motor (AFPMSM) intended for CNC machines. First, it investigates the structural characteristics and manufacturing features of the YASA (Yokeless And Segmented Armature) type AFPMSM, examining how to achieve high torque density and mitigate torque ripples. Second, a Quasi-3D analysis method is introduced to maintain an accuracy level close to that of three-dimensional finite element analysis (3D-FEA) while significantly shortening the overall simulation time. Finally, using the results of the Quasi-3D analysis, this study proposes an optimal design solution that effectively reduces cogging torque with minimal impact on the motor’s output performance.