基于熵分析的电动汽车电机及电机控制器热管理系统研究  

Research on Thermal Management System of Motor and Motor Controller for Electric Vehicle Based on Entropy Analysis

作　　者：李夔宁[1,2] 邓廷婷 谢翌[3] 吴存学 王平忠 Li Kuining;Deng Tingting;Xie Yi;Wu Cunxue;Wang Pingzhong(Key Laboratory of Low-grade Energy Utilization Technologies and Systems,Ministry of Education of China,Chongqing University,Chongqing 400044;School of Energy and Power Engineering,Chongqing University,Chongqing 400044;School of Automotive Engineering,Chongqing University,Chongqing 400044;Chongqing Chang’an New Energy Vehicle Technology Co,Ltd.,Chongqing 401120)

机构地区：[1]重庆大学低品位能源利用技术及系统教育部重点实验室,重庆400044 [2]重庆大学能源与动力工程学院,重庆400044 [3]重庆大学汽车工程学院,重庆400044 [4]重庆长安新能源汽车科技有限公司,重庆401120

出　　处：《汽车实用技术》2020年第8期9-13,共5页Automobile Applied Technology

基　　金：国家重点研发计划(2018YFB0106100);重庆市技术创新与应用发展(产业类重大主题专项)(No.cstc2018jszx-cyztzx0130)。

摘　　要：为使能量损失最小,从热力学的角度对电动汽车电机及电机控制器热管理系统的串联构型和并联构型进行熵分析,得到系统的有效能损失和不可逆度,并通过仿真分析得到两种构型的系统不可逆度与车速、冷却液流量和空气流量的关系。结果表明两种构型的系统不可逆度随冷却液流量和空气流量的变化趋势相似,并联构型在低车速下较串联构型具有优势,但随着车速增加,串联构型将更具有优势且占优势的车速区间更大。最后,以不可逆度最小为目标,对每一车速工况进行最优冷却液流量和空气流量匹配。In order to minimize the energy loss,this paper calculated the entropy production of the series configuration and parallel configuration of the thermal management system of the motor and motor controller for electric vehicles from the perspective of thermodynamics,and obtained the effective energy loss and irreversibility of the system.The relationship among the irreversibility,the vehicle speed,the coolant flow rate and the air flow rate of the two configurations was obtained by simulating.The results show that the trend of irreversibility with coolant flow and air flow of the two configurations is similar.The parallel configuration has advantages over the series configuration at low vehicle speed,but the series configura-tion will be better as the vehicle speed increases,and its dominant speed range is larger.Finally,this paper aimed at the minimum irreversibility and optimized the optimal coolant flow rate and air flow rate for each vehicle speed.

关 键 词：电动汽车 电机及电机控制器 热管理系统 熵分析 不可逆度 

分 类 号：U469.72[机械工程—车辆工程]