电动汽车用扁线异步电机性能分析与计算  

Performance Analysis and Calculation of Flat Wire Induction Motors for Electric Vehicles

作　　者：史俊旭 吴霜 陈致初 胡勇峰 杨斌 胡巧 SHI Junxu;WU Shuang;CHEN Zhichu;HU Yongfeng;YANG Bin;HU Qiao(Zhuzhou CRRC Times Electric Co.,LTD.,Zhuzhou Hunan 412005,China;Changsha First Social Welfare Institute,Changsha 410007,China)

机构地区：[1]株洲中车时代电气股份有限公司,湖南株洲412001 [2]长沙市第一社会福利院,长沙410007

出　　处：《微电机》2024年第4期52-59,共8页Micromotors

基　　金：湖南省科技创新领军人才计划(2021RC4050)。

摘　　要：随着电动汽车行业的高端化发展,异步电机以其优越的性能特点及成熟的制造工艺,成为电动汽车辅驱电机的首选。为满足高效率、高功率密度、良好的NVH等性能需求,扁线绕组被逐渐应用于电动汽车驱动电机中。为深入研究交流损耗对扁线电机定子铜耗及效率的影响,揭示扁线电机性能较传统圆线电机的优势所在,本文以一台自主设计的峰值功率为140kW的扁线绕组异步电机为研究对象,首先,从数学模型与仿真计算两方面出发,分析了交流损耗的变化规律,并基于考虑交流损耗前、后电机性能的变化情况,说明了扁线绕组的交流损耗是影响电机效率的关键因素之一。在仿真过程中,为缩短仿真耗时,介绍了一种并行瞬态求解算法在异步电机中的应用原理。最后,对具有相同定子槽面积及转子结构的扁线电机与圆线电机的性能进行仿真计算与对比分析,结果表明,与圆线电机相比,扁线电机具有更高的效率、功率密度及更好的热性能等运行特点。With the high-end development of the electric vehicle(EV)industry,induction motors(IMs),due to their superior performance characteristics and mature manufacturing processes,have become the preferred choice for auxiliary drive motors in EVs.To meet the performance requirements of high efficiency,high power density,and excellent NVH(Noise,Vibration,and Harshness),flat wire winding is gradually being applied in EV motors.In order to delve into the impact of AC losses on the stator copper losses and efficiency of flat wire motors,and to reveal the advantages of flat wire motors over traditional round wire motors,this paper took a self-designed IM with a peak power of 140 kW as the research object.Firstly,from the perspectives of mathematical modeling and simulation calculations,the variation pattern of AC losses was analyzed.Based on the changes in motor performance before and after considering AC losses,it was explained that AC losses of flat wire winding were one of the key factors affecting motor efficiency.In the simulation process,to shorten simulation time,the application principle of a parallel transient solution algorithm in IMs was introduced.Finally,the electromagnetic performance of flat wire motors and round wire motors with the same stator slot area and rotor structure was simulated,analyzed,and compared.The results show that compared to round wire motors,flat wire motors exhibit higher efficiency,power density,and better thermal performance during operation.

关 键 词：异步电机 扁线绕组 交流损耗 效率map计算 

分 类 号：TM346[电气工程—电机]