关键词: 永磁同步电机, 有限元分析, 温度场, 优化

Abstract: Taking a 5. 5 kW electric vehicle with built-in fan permanent magnet synchronous motor as the research object , the motor’ s three-dimensional calculational model was established and the reasonable grid division was carried out, the finite element analysis method was used to simulate and analyze the temperature field of the motor at rated state. By changing the structure of the rear end cover of the motor, the motor ’ s windy way was improved. By comparing the
temperature amplitude of the motor before and after, the moderation of the improved scheme was verified, which provides the designed basis for balancing the temperature distribution of the permanent magnet synchronous motor and reducing the high point of the temperature rise.

Key words: permanent magnet synchronous motor, finite element analysis, temperature field, optimization