外永磁转子爪极电机空载气隙磁场解析计算  

Analytic Model of No Load Air Gap Magnetic Field for Claw Pole Motor with Outer Permanent Magnet Rotor

作　　者：刘光伟[1] 张凤阁[1] 魏瀚阳 赵鑫[1] 

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》2014年第1期52-59,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51077094;51207094);长江学者和创新团队发展计划(IRT1072);辽宁省高校创新团队支持计划(LT2011003)资助项目

摘　　要：由于外永磁转子爪极电机的结构复杂,其空载气隙磁场需通过建立三维模型进行分析,而采用三维有限元方法计算耗时较长且网格剖分对其计算结果影响加大,因此本文提出了一种在极坐标系向建立的空载磁场解析计算模型。通过轴向分段的方法,将该电机三维模型转化为多个二维模型,并给出了相应的的边界条件,利用傅里叶级数变换和分离变量法推导得出了空载气隙磁场的切向和轴向磁通密度,齿槽转矩和空载反电动势的解析式。为了验证解析模型的准确性,将解析计算结果与有限元计算和样机实验测量的结果相比较,结果对比误差较小,验证了解析模型的准确性和可行性。The no load air gap magnetic field of claw pole motors with outer permanent magnet rotors（CPMOPMR） should be analyzed by 3D model due to its complicated structure. And, in view of the time consuming and sensitive to finite element meshes, the finite element method（FEM） is not suitable for analysis. So a new analytical calculation model based on no load air gap magnetic field analysis in polar coordinates is proposed. According to segmentation in shaft directions, 3D model is converted to many 2D models, then their boundary conditions are assigned, and the radial and tangential flux density is obtained by using the Fourier＇s series and the method of separation of variables. Then the expression of cogging torque and no load back EMF is derived. In order to verify the accuracy of the analytical model, the finite element analysis is finished. Moreover, one prototype is manufactured and measured also. The analytical results well agree with those obtained by the FEM and experiments, and confirm the feasibility of this method.

关 键 词：永磁电机 爪极电机 磁场解析计算 磁路模型 

分 类 号：TM315[电气工程—电机]