关键词: 永磁同步电机, 温升特性, 热管理策略, 多工况分析, ANSYS 仿真

Abstract: In response to the thermal management requirements for high power density motors, an electromagneticthermal coupled numerical model was established. By integrating multiphysical field simulations with experimental validation methods, a systematic evaluation of the synergistic effects of combined oil-water cooling strategies was conducted. The research elucidates the influence of coolant parameters on heat transfer from critical heat sources and establishes a modified boiling heat transfer model under plateau low-pressure environments. The optimized composite cooling system achieved a 14. 7% reduction in winding hotspot temperatures under peak torque conditions. An increase of 10 L / min in coolant flow rate resulted in a 12. 3% decrease in stator winding temperature rise. The helical cooling channel designs enhanced heat exchange efficiency. The multi-condition adaptability assessment framework constructed in this study provides a comprehensive solution encompassing dynamic adjustment, material innovation, and intelligent prediction for the development of thermal management systems for high power density motors in extreme environments.

Key words: permanent magnet synchronous motor ( PMSM), temperature rise characteristics, thermal management strategy, multi-condition analysis, ANSYS simulation