地铁车辆用永磁直驱同步牵引电动机冷却结构设计

Cooling Structure Design of Direct-driven Permanent Magnet Synchronous Traction Motor for Metro Vehicle

针对永磁直驱电机体积小、转矩密度高、损耗密度大、散热困难的问题,基于190 k W的地铁车辆用永磁直驱同步牵引电动机,在四角冷却结构的基础上设计了3种往返式循环水路结构,对3种冷却水路结构进行流体场计算,选取最优方案进行温度场分析,制造了一台功能样机进行试验验证,试验结果与计算结果相吻合,且温升合理,电机稳定可靠运行。

Due to small volume, high torque density, high loss density, cooling difficulties of direct-driven permanent magnet synchronous traction motor, on the basis of the four angle cooling structure, three kinds of reciprocating cycle cooling structures were designed for a 190 kW direct-driven permanent magnet synchronous traction motor. The three kinds of cooling structures were calculated with fluid field, and an optimal cooling structure was selected for the analysis of temperature field. A prototype was manufactured and a temperature experimental platform was developed. The experimental results were validated temperature rise was reasonable and the motor was stable and reliable.