电动汽车用永磁电机温升及冷却的研究  

Research on Temperature Rise and Cooling of Permanent Magnet Motors for Electric Vehicles

作　　者：陈丽香[1] 付佳玉 张超[1] 孙宁[1] CHEN Lixiang;FU Jiayu;ZHANG Chao;SUN Ning(National Engineering Research Center for REPM Electrical Machines of Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学国家稀土永磁电机工程技术研究中心,沈阳110870

出　　处：《微电机》2020年第6期13-17,23,共6页Micromotors

摘　　要：本文基于一台104kW,1250r/min的电动汽车用永磁电机,设计了螺旋与Z形的水冷结构,基于流固耦合法,对两种冷却结构下电机的流体场与温度场进行分析,详细对比了两种水冷结构下的电机绕组、铁心的温升以及轴承和永磁体的温度。另外,为了进一步优化电机的冷却结构,本文设计了不同数量、宽度的水路,研究不同水路结构对电机温升的影响。最后基于设计好的水冷结构,给定不同的冷却水速,研究水流速度对电机温升的影响,并进行了不同水流速度下的温升试验。将实验值和计算值进行了误差分析,其误差在工程允许范围内,验证了冷却方案的可行性。Based on a 104kW,1250r/min permanent magnet motor for electric vehicles,a spiral and Z-shaped water-cooled structure is designed.Based on the fluid-solid coupling method,the fluid field and temperature field of the motor under two cooling structures are analyzed.The motor windings under the water-cooled structure,the temperature rise of the core,and the temperature of the bearings and permanent magnets.In addition,in order to further optimize the cooling structure of the motor,different numbers and widths of waterways were designed to study the influence of different waterway structures on the temperature rise of the motor.Finally,based on the designed water-cooled structure,given the different cooling water speeds,the influence of water flow speed on the temperature rise of the motor was studied,and the temperature rise test under different water flow speeds was carried out.The experimental and calculated values were analyzed for error,and the error was within the engineering allowable range to verify the feasibility of the cooling scheme.

关 键 词：电动汽车 永磁同步电机 温升 电机冷却 

分 类 号：TM351[电气工程—电机] TM341