电动汽车减速驱动轮毂电动机散热设计及分析  

Heat Dissipation Design and Analysis of Electric Vehicle Deceleration Drive Hub Motor

作　　者：侯庆伟 陈奇[1] 唐查强 HOU Qingwei;CHEN Qi;TANG Zhaqiang(School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学机械工程学院,合肥230009

出　　处：《机械工程师》2023年第12期10-14,共5页Mechanical Engineer

基　　金：安徽省重点研究与开发计划项目(JZ2022AKKG0093)。

摘　　要：为了解决电动汽车减速驱动型轮毂电动机散热条件差、温升高等问题,文中设计一种端面水冷冷却结构,用于轮毂电动机系统。首先利用有限元方法与电磁学理论计算电动机内部损耗,确定其自然散热条件下的温度场分布;并基于流热固耦合方法,以电动机绕组最高温度和冷却水道压降为评价指标,针对该冷却结构采用正交试验法分析不同冷却液进口流速、水道齿数、截面宽度、弯道圆角对轮毂电动机冷却散热效果的影响,并进行参数优化。结果表明:该冷却结构降温效果受进口流速影响最大,受弯道圆角影响最小,冷却效果可达24.1%;通过分析正交试验数据,对参数组合进行优化,可进一步降低4.6%温升,为减速驱动轮毂电动机冷却散热研究提供新的方案。In order to solve the problems of poor cooling condition and high temperature rise of the decelerated drive hub motor of electric vehicles,this paper designs a water-cooled structure for the end-face for the hub motor system.Firstly,the finite element method and electromagnetic theory are used to analyze the internal loss of the motor,so as to obtain the temperature field distribution of the motor without cooling and heat dissipation.Based on the fluid-thermo-solid coupling method,the maximum temperature of the motor winding and the pressure drop of the cooling channel are taken as the evaluation indexes.The orthogonal test method is used to analyze the influence of different inlet velocity of the coolant,the number of channel teeth,the section width and the rounded corners of the curve on the cooling and heat dissipation effect of the hub motor,and the parameters are optimized.The results show that:the cooling effect of the cooling structure designed in this paper is most affected by the inlet flow rate,and the curve rounded corner has the least influence,and the cooling effect can reach 24.1%.By analyzing the orthogonal test data and optimizing the parameter combination,the temperature rise can be further reduced by 4.6%.This paper provides a new scheme for the research of cooling and heat dissipation of reducer drive wheel motor.

关 键 词：电动汽车 轮毂电动机 有限元分析 冷却结构优化 正交试验法 

分 类 号：TM351[电气工程—电机] TB115[理学—数学]