某车用扁线电机端部油冷效果分析及优化  

Analysis and Optimization of Oil Cooling Effect at the End of a Flat Wire Motor Used in a Certain Vehicle

作　　者：陈松 徐平祥 刘玉玺 CHEN Song;XU Pingxiang;LIU Yuxi(School of Mechanical Engineering,Chongqing University of Technology,Chongqing 400054,China;School of Smart Health,Chongqing Polytechnic University of Electronic Technology,Chongqing 401331,China;Technical Department of Chongqing Qingshan Industrial Co.,Ltd.,Chongqing 402776,China)

机构地区：[1]重庆理工大学机械工程学院,重庆400054 [2]重庆电子科技职业大学智慧健康学院,重庆401331 [3]重庆青山工业有限责任公司技术部,重庆402776

出　　处：《机床与液压》2024年第19期165-173,共9页Machine Tool & Hydraulics

基　　金：重庆市自然科学基金项目(CSTB2023NSCQ-MSX0255)。

摘　　要：以某款电动汽车用额定功率为230 kW的油冷扁线电机为研究对象,根据相关参数建立分析模型,并进行高速工况下的损耗分析;基于传热学、流体力学以及有限体积法,对原有结构进行仿真计算,结果表明:前、后侧喷油口流速与压力分布不均,导致电机温度场分布不均、温差较大。针对前、后端喷油环喷淋不均、电机内部温差较大的情况,对冷却系统的关键结构参数进行优化设计。然后,计算分析优化后冷却系统的流体场与温度场特性,并与优化前结构进行对比。结果表明:优化后喷油环前、后侧出口速度差与压差更为均衡,定子及其绕组前、后端的温差明显降低,绕组最高温度下降了9.1%,前、后侧端部绕组最大温差降低至优化前的17.3%,电机的整体冷却性能显著提高。The research object was an oil cooled flat wire motor with a rated power of 230 kW used in a certain electric vehicle.A finite element model was established based on relevant parameters and loss analysis under high-speed operating conditions was conducted.Based on heat transfer,fluid dynamics and finite element method,simulation calculations were conducted on the original structure.The results show that the uneven flow rate and pressure at the front and rear fuel injection ports result in uneven distribution of the motor temperature field and large temperature difference.In response to the uneven spraying and large temperature difference of the front and rear fuel injection rings,the key structure and parameters of the cooling system were optimized through calculation and analysis.Then,the fluid and temperature fields characteristics of the optimized cooling system were calculated and analyzed,and compared with the structure before optimization.The results show that the optimized fuel injection ring has a more balanced velocity and pressure difference at the front and rear outlets,and the temperature difference between the stator and its winding at the front and rear ends is significantly reduced.The highest temperature decreases by 9.1%,and the maximum temperature difference decreases by 17.3%.The overall cooling performance of the motor system is significantly improved.

关 键 词：扁线绕组 喷油冷却 电机损耗 流体场 温升特性 

分 类 号：TM351[电气工程—电机]