高功率密度轴向磁通永磁电机交流铜耗分析  

Analysis of AC copper loss in high power density axial flux permanent magnet motors

作　　者：武岳 张志锋[1] 平佳齐 WU Yue;ZHANG Zhi-feng;PING Jia-qi(School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学电气工程学院,辽宁沈阳110870

出　　处：《电机与控制学报》2022年第5期65-75,共11页Electric Machines and Control

基　　金：国家自然科学基金面上项目(51877139);辽宁省教育厅科学研究经费项目(面上项目)(LJKZ0128)。

摘　　要：针对轴向磁通永磁电机的绕组交流铜耗会对电机性能产生较大影响的问题,综合考虑趋肤效应、邻近效应和外部磁场,对绕组交流铜耗的分布和降低交流铜耗的方法进行研究。首先根据绕组的实际尺寸,分别建立了2D有限元导体模型与3D有限元导体模型,对比分析了两种有限元法对准确计算绕组交流铜耗的影响。其次对扁铜线绕组电机和圆铜线绕组电机的交流铜耗和效率进行全面对比,提出采用扁线立绕方法降低扁铜线绕组的交流铜耗,并提高电机的效率。最后对一台额定功率为60 kW的轴向磁通永磁电机进行实验,实验结果与仿真结果基本吻合,证明了仿真模型的有效性和扁线立绕方法的正确性。Aiming at the problem that AC copper loss of axial flux permanent magnet(AFPM)motor has a great influence on the performance of the motor,the distribution of AC copper loss and the method of reducing AC copper loss were studied by considering skin effect,proximity effect and external magnetic field.Firstly,2D finite element conductor model and 3D finite element conductor model were established respectively according to the real size of windings,and the influence of the two finite element methods on the accurate calculation of AC copper loss of windings was compared and analyzed.Secondly,the AC copper loss and efficiency of flat copper wire motor and round copper wire motor were compared comprehensively.The method of flat wire vertical winding was proposed to reduce the AC copper loss of flat copper wire winding and improve efficiency of the motor.Finally,the AFPM motor with rated power of 60 kW was tested,and the experimental results were basically in agreement with the simulation results,which proves effectiveness of the simulation model and the correctness of the flat wire vertical winding method.

关 键 词：轴向磁通永磁电机 交流铜耗 3D有限元 扁铜线 圆铜线 扁线立绕 

分 类 号：TM[电气工程]