分数槽永磁电机永磁体谐波涡流损耗建模与分析  

Analytical Modeling and Analysis of Magnet Harmonic Loss in Fractional Slot Permanent-Magnet Machines

作　　者：陈浈斐[1] 邢宁 马宏忠[1] 李志新 章黄勇 Chen Zhenfei;Xing Ning;Ma Hongzhong;Li Zhixin;Zhang Huangyong(College of Energy and Electrical Engineering Hohai University,Nanjing 211100 China;Marketing Service Center State Grid Jiangsu Electric Power Co.Ltd,Nanjing 210019 China)

机构地区：[1]河海大学能源与电气学院,南京211100 [2]国网江苏省电力有限公司营销服务中心,南京210019

出　　处：《电工技术学报》2022年第14期3514-3527,共14页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(51907052);中国博士后科学基金项目(2017M621606);江苏省博士后科研项目(2016-416109)资助。

摘　　要：准确求解分数槽永磁电机电枢磁场下的永磁体涡流损耗解析解,探究谐波涡流损耗随绕组结构的变化规律是改进绕组结构抑制涡流损耗的关键。针对此问题,该文提出四层绕组电流密度建模方法,实现对三相/双三相、双层/四层绕组结构的建模。基于现有的子域模型,将四层绕组结构的槽身区域划分为上层绕组和下层绕组区域,增加上层绕组与下层绕组交界处的边界条件,确定各子域磁场的谐波系数。通过设计瞬态电枢磁场求解程序,建立涡流损耗解析模型。以四台仅绕组结构不同的10极12槽永磁电机为例,利用有限元仿真验证了损耗模型的精确性。基于该损耗模型,探究了谐波涡流损耗随绕组相数和层数的变化规律,并使用磁动势从机理上分析该规律,为改进绕组结构抑制涡流损耗的研究方向提供一些思路。The key to optimize winding layouts and reduce magnet eddy-current loss of fractional slot permanent-magnet machines is to calculate the loss under armature magnetic field and investigate the variation of harmonic loss with winding layouts.To solve this problem,this paper proposes a current density modeling method of four-layer winding to realize the modeling of three-phase/dual-three-phase,double-layer/four-layer windings.Based on the subdomain model,the slot area of four-layer winding is further divided into the top-layer winding part and the bottom-layer winding part,the boundary condition between the two winding parts is added,and the harmonic coefficients of each subdomain are determined.The analytical model of eddy-current loss is established by solving the transient armature magnetic field.Four 10-pole/12-slot machines with different windings are taken as examples to validate the proposed model by finite element simulation.Based on the proposed model,the variation of harmonic eddy-current loss with the number of winding phases and layers is summarized and analyzed by magnetomotive force,which provides some ideas for optimizing the winding configurations to reduce eddy-current loss.

关 键 词：分数槽永磁电机 电枢磁场 永磁体涡流损耗 谐波涡流损耗 双三相绕组 四层 绕组 

分 类 号：TM341[电气工程—电机]