转子槽数对电动汽车用异步电机性能的影响  

Effect of the Rotor Slot Number on the Performance of Asynchronous Motor in Electric Vehicles

作　　者：王晓远[1] 赵玉双[1] 高淼[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2016年第5期450-456,共7页Journal of Tianjin University：Science and Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2011AA11A259)

摘　　要：介绍了一种应用在电动汽车上的高功率密度异步电机.首先简要分析了转子槽数对附加损耗和最大转矩的影响,然后通过场路耦合的有限元方法对6种不同转子槽数下的电机电气性能做了仿真分析,研究了电机的气隙磁通密度波形、电机的磁通密度分布以及输出转矩的波动情况,并计算了电机满载时的铜耗和铁耗,进行了性能参数的比较,最终得到了合理的转子槽数.通过分析表明,当电动汽车用异步电机转子槽数设计为68槽时,与其他槽数的电机相比,其电流密度最高可降低2.97%,过载能力最高可提高13.8%,并且电机效率可达91.55%,电机有最佳的性能输出,能够很好地满足电动汽车对驱动电机的性能要求.A high power density asynchronous motor in electric vehicles was introduced. A brief analysis on the influence of rotor slot number on additional loss and maximum torque was presented. And the properties of six types of motors with different rotor slot numbers were analyzed with field-circuit coupled finite element method. The stators were identical in all motors. Their electromagnetic characteristics,including magnetic flux density,ripple torque,maximum torque and copper loss and core loss at full load,were extracted and compared with each other. Finally,the proper number of rotor slots in combination with stator slot numbers was concluded. The results reveal that,compared with those of other motors,the current density of the motor with rotor slot number of 68 decreases up to 2.97%,the overload capacity is increased by 13.8%,and the efficiency is 91.55%. The motor with rotor slot number of 68 has the best performance,meeting the performance requirements for the drive motor in electric vehicles very well.

关 键 词：电动汽车 转子槽数 有限元方法 电磁性能 

分 类 号：TM354[电气工程—电机]