轴向磁通永磁电机扁铜线交流铜耗的混合解析计算及抑制  

Hybrid Analytical Calculation and Suppression of AC Copper Loss of Flat Copper Wire in Axial Flux Permanent Magnet Motor

作　　者：武岳 张志锋[1] Wu Yue;Zhang Zhifeng(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,沈阳110870

出　　处：《电工技术学报》2023年第24期6609-6618,共10页Transactions of China Electrotechnical Society

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(面上项目)(LJKZ0128)资助。

摘　　要：轴向磁通永磁电机的扁铜线交流铜耗会严重影响电机性能,因此扁铜线交流铜耗的精确计算与抑制十分重要。采用三维瞬态场计算交流铜耗,虽然可以获得精确的结果,但存在计算时间长和对计算机性能要求高的问题。为了权衡计算精度与计算时间,提出一种混合解析计算的方法。该方法将三维有限元与解析法相结合,可以考虑趋肤效应、邻近效应和外部磁场对交流铜耗的影响。为了抑制交流铜耗,提出采用扁线立绕的导体排列方式。利用该方法对不同导体排列方式的交流铜耗和电机效率进行计算,并通过三维瞬态场有限元进行验证。最后,对一台60 kW的样机进行实验,实验结果、有限元结果和混合解析计算结果基本吻合,验证了混合解析计算的准确性和扁线立绕的有效性.Axial flux permanent magnet motor is suitable for the field with high requirements on motor perfor-mance and installation space due to advantages such as high-power density,small volume,and light mass.In the field of high-power density motors,flat copper wire is used for its high slot-filling rate and excellent heat dissipation performance.However,due to the influence of skin effect,proximity effect,and external magnetic field,the flat copper wire has a higher AC copper loss,which can seriously affect the motor performance and the insulating material life.Therefore,accurate calculation and suppression of AC copper loss of flat copper wire are significant.Although accurate results can be obtained using the three-dimensional transient field to calculate AC copper loss,some issues,such as long computing time and high computer performance requirements,could be improved.Therefore,a hybrid analytical calculation method is proposed to balance calculation accuracy and calculation time.This method combines the three-dimensional finite element with the analytical method,which can consider the influence of skin effect,proximity effect,and external magnetic field on AC copper loss.Meanwhile,a conductor arrangement of flat wire vertical winding is proposed to suppress AC copper loss.Firstly,according to the actual size of the winding,a detailed three-dimensional model of flat copper wire is established in the eddy current field,and the magnetic flux density is calculated.Secondly,the combined sampling method of parts,segments,and layers is adopted.Finally,the sampling magnetic flux density is combined with the analytical model to calculate the AC copper loss.A 60 kW,18-slot,20-pole double-rotor single-stator axial flux permanent magnet motor was taken as an example.Firstly,the proposed method analyzed the AC copper loss of different conductor arrangements,verified by a three-dimensional transient field finite element.The AC copper loss of the flat wire vertical winding is reduced by 36.9%compared with that of the flat wire pa

关 键 词：轴向磁通永磁电机 扁铜线 交流铜耗 混合解析计算 导体排列方式 

分 类 号：TM351[电气工程—电机]