关键词: 电机散热, 定子浸漆, 定子灌胶, 团状模塑料

Abstract: Based on the thermal theory of motors, the heat sources, heat conduction paths and cooling methods of permanent magnet motors were analyzed. To improve cooling performance, methods such as varnishing, potting, and bulk molding compound injection molding were proposed. The impact of the materials used on the thermal conductivity and heat transfer capability of the equivalent model was analyzed. Additionally,the 3D model of the motor was simulated using finite element software to analyze its cooling performance. Compared to traditional stator hot mounting,the winding temperature of stator impregnation, stator potting, and stator injection molding are reduced by 23. 14 ℃ , 26. 54 ℃ , and 22. 65 ℃ respectively,with significant heat dissipation effects. The production time for stator injection molding takes only 3 minutes, and the molded shell can replace the iron shell,offering a clear advantage in small motor applications.

Key words: motor cooling, stator impregnation, stator potting, bulk molding compound