基于精确子域模型的双定子磁通反向电机磁场解析计算  

An Accurate Subdomain Model for Magnetic Field Computation in Double Stator Flux Reversal Machine

作　　者：邹定琛 曹江华[1] ZOU Dingchen;CAO Jianghua(South China University of Technology, School of Electrical Power, Guangzhou 510641, China)

机构地区：[1]华南理工大学电力学院,广州510641

出　　处：《微电机》2022年第2期15-23,共9页Micromotors

摘　　要：双定子磁通反向电机是一种基于磁场调制原理的新型永磁电机,适用于船舶推进、风力发电等低速大转矩的应用场合。相较于传统的磁通反向电机,双定子拓扑能够解除单定子磁通反向电机永磁体和绕组的空间冲突问题,但同时也会增加其边界条件的复杂度。准确计算双定子磁通反向电机的磁场分布是设计、优化电磁性能的关键,而建立精确的数学模型则是求解电机磁场问题的关键,双定子磁通反向电机边界条件复杂,求解传统单定子电机齿槽效果的保角变换法已经不再适用。本文采用子域模型法,以具有复杂边界的双定子磁通反向电机为研究对象,在不同气隙子域建立二维矢量拉普拉斯方程,在永磁体区域建立二维矢量泊松方程,根据分离变量法直接求解,在解析模型的基础上,求解了气隙磁密及其齿槽转矩的分布,并用有限元仿真软件验证了其准确性。Double stator flux reversal machine(DS-FRM)is a kind of novel permanent magnet machines,based on magnetic modulation principle,and it is becoming a promising candidate for low-speed high-torque applications such as ship propulsion and wind power generation.Compared with traditional flux reversal machines(FRM),the topology of DS-FRM can solve the confliction between permanent magnets and windings of single stator FRM,but its boundary conditions become more complex.The accurate magnetic calculation of DS-FRM always plays an important role in design and optimization of its electrical performances,While to establish an accurate mathematical model is the key to solve the magnetic field problem.However,the boundary conditions of DS-FRM are complicated,conformal transformation method for solving the cogging effect of conventional single stator motor is no longer applicable.In this paper,the accurate subdomain model method was adopted to investigate the DS-FRM with complex boundary,the two-dimensional vector laplace equation was established in different air gap subdomains,and the two-dimensional vector Poisson equation was established in the permanent magnet domain,and different equations in different subdomains were solved by the separation of variables method.Based on analytical solutions,the distribution of air gap magnetic density and cogging torque were solved,and the results were validated by finite element method.

关 键 词：双定子磁通反向电机 精确子域模型 空载磁场 解析计算 

分 类 号：TM351[电气工程—电机]