中文摘要：

电机控制器的散热性能影响着电机的输出性能。为了解决IGBT模块高热流密度的问题，以直接水冷IG-BT模块翅针散热器为研究对象，采用有限元方法建立翅针散热器及电机控制器冷却水槽的散热模型，并利用有限元软件ICEPAK对不同流量、结构参数下IGBT模块翅针散热器的散热性能进行仿真分析，总结了各主要参数对散热性能的影响规律。结果表明，在满足散热器压降的条件下，翅针直径为2．6mm，翅针长度为8mm，翅针间距为7．2mm×4．2mm，流量为10时翅针散热器具有更好的散热效果，其结论对翅针散热器的优化设计提供了参考。

英文摘要：

The cooling performance of motor controller affects the output performance of the electric machine. In order to solve the problem of IGBT module which is caused by high density of heat flow rate, we regard the pin-fins radiator of direct-cooling IGBT module radiator as the research object. The finite element method is adopted to estab- lish the model of pin-fins radiator and the cooling water tank of motor controller. The cooling performance of the pin- fins radiator of IGBT module is simulated with ICEPAK with different flow and structural parameters, and the influ- ence of the main parameters on the cooling performance is summed up. Under reasonable conditions of the radiator＇s pressure drop, the pin-fins radiator has better cooling performance when the pin-fins diameter is 2. 6 mm, the pin-fins length is 8mm, and the pin-fins spacing is 7.2×4. 2 L/min, which provides a reference for optimization design of the pin-fins radiator.