Optimization design of Cogging Torque for Permanent Magnet Synchronous Servo Motor with Modular stator

To achieve a smaller cogging torque the modular stator was designed, a 12-slot 8-pole permanent magnet synchronous motor was used as a model. The effect of the additional air gap caused by stator modularization on the cogging torque was calculated using finite element simulation software. The change of the cogging torque with the additional air gap of the open and closed slots was obtained. The Fourier analysis of the distribution of Permanent magnet magnetic density of the armature obtained by the finite element calculation is carried out to conclude the finite element. The judgment obtained by the cogging torque analytical method model was unified. The three-dimensional finite element calculation of the fully closed slot structure and the closed-open slot hybrid structure was selected based on the above analysis. Finally, a hybrid form of open-closed slots is obtained, effectively suppressing the cogging torque while realizing the stator's modular design.