关键词: 混合叠压定子铁心, 永磁同步电机, 再制造, 齿槽转矩

Abstract: In order to improve the performances of the remanufactured motors， the stator cores were reconstructed by mixing the amorphous materials and the silicon steel materials. Based on energy method and considering the structural characteristics of the stator hybrid laminated motors， a method for calculating the cogging torques of the stator hybrid laminated motors by using piecewise superposition was proposed to approximate 3D calculation. According to the piecewise superposition method，the segmented reverse skewed slots was used to reduce the cogging torques. Based on Ansoft 3D finite element analysis software， the influences of mixed stacking mode on cogging torques were analyzed， and the performance parameters of motors under different mixing ratios were compared to determine the proportion of materials. Besides，the cogging torque and the no-load electrodynamic force under the determined mixed proportions were analyzed.The results show that the cogging torques of the hybrid motors are independent of the stacking mode but only related to the proportions of the materials. Comparied with the forward skewed slots， the reverse skewed slots have little influences on the motor performances and reduce the cogging torques very well. The simulation results were compared with the superposition calculation results， which verifies the feasibility of the two-dimensional simulation approximate calculation of laminated.

Key words: hybrid laminated stator core, permanent magnet synchronous motor, remanufacture, cogging torque