摘要
针对高功率密度电机功率大、体积小的特点,通过综合选择水冷系统平衡电机的热量,保证高功率密度电机的散热。利用计算流体动力学(CFD)和热场比较轴向型、周向型、螺旋型3种水冷方式,从流速、冷却效果、水泵功率、温度分布及工艺等多方面综合比较并选择最优水路结构——螺旋型水路,并应用此水路作为高功率密度电机的机壳内部水冷方式。传统电机的电流密度为5.0 A/mm2,通过采用螺旋型水冷系统、优化电机磁路结构和对材料的特殊设计,同样的温升可使电流密度增至10.0 A/mm2。这样在电机体积和重量基本不变的情况下可使电机的功率提高1倍,达到设计高功率密度电机的目标。最后,通过红外热成像仪的温度测试验证螺旋型水路应用CFD流固耦合温度场分布的一致性。
The focus of the paper consist in the design and analysis of the water cooling system applied in HEVs high power density motor. To make sure of the heating transfer of high-power-density motor,it's the key to choose the suitable cooling structure. The paper uses computational fluid dynamics( CFD) and the coupling of solid and liquid thermal analysis to analyze three cooling methods,i. e. axial,radial,and spiral channels. The aim of the paper is to find the optimal cooling structure through the comparison of the velocity distribution,heating transfer, the consumption of water pump, the temperature distribution, and the processing technic. Finally,the spiral channel is adopted for high power density motor as the frame cooling structure. Thus,the design target of 10. 0 A / mm2 is achieved with optimized magnetic circuit and special material. With the same temperature rise,the current density of the proposed high-power density motor is about 2 times higher than that(5. 0 A/mm2) in normal motor. At last,the testing of temperature by the infrared equipment is done to verify the results by CFD and hot spot of thermal field in FEA.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第9期30-38,共9页
Transactions of China Electrotechnical Society
