分数槽Halbach永磁直线同步电机磁场解析计算  

Magnetic field calculation of fractional-slot Halbach permanent magnet linear synchronous motor

作　　者：师宇飞 汪旭东[1] 许孝卓[1] 封海潮[1] 

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454000

出　　处：《合肥工业大学学报（自然科学版）》2017年第12期1619-1623,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(61074095);河南省教育厅自然科学研究资助项目(13A470337);河南省国际合作资助项目(144300510014)

摘　　要：分数槽Halbach永磁直线同步电机(fractional-slot Halbach permanent magnet linear synchronous motor,FH-PMLSM)的次级永磁体采用Halbach阵列,初级绕组采用端部不重叠的集中绕组,与常规的分数槽永磁同步直线电机相比,具有推力密度大、损耗小等优点,适用于长行程、大推力驱动场合。文章在Halbach永磁阵列的电流密度等效基础上,对16极15槽FH-PMLSM建立分层解析模型,利用矢量磁位和边界条件推导出气隙区域、齿槽和永磁体区域磁场的解析公式,并结合分布式卡式系数分析FH-PMLSM励磁磁场的分布,进一步对不同气隙长度的FH-PMLSM的电磁推力进行计算。结果表明:解析计算与有限元计算的磁场结果基本吻合,验证了该解析方法的正确性,为分数槽Halbach永磁同步直线电机的工程分析和优化设计提供了依据。Fractional-slot Halbach permanent magnet linear synchronous motor(FH-PMLSM),which has secondary permanent magnet with Halbach array and primary winding with concentrated winding of non-overlapping ends,possesses the merits of high thrust density and low power losses and is especially suitable for the long stroke transportation and large thrust system.The multilayer analytical model of a FH-PMLSM prototype with 16 poles and 15 slots is presented based on the current density equivalence of Halbach array.Combined with the distributed Carter coefficient function,the magnetic fields of FH-PMLSM generated by permanent magnet are analyzed and calculated according to the analytical flux formulas of air gap field,slot field and permanent magnet field derived by vector potential and boundary conditions.And the electromagnetic force of FH-PMLSM with different air gap length is calculated by using the analytical method.It is shown that the results of the analytical calculation are consistent with those of the finite element calculation,thus verifying the correctness of the analytical method.The study can provide references for the engineering analysis and optimization of the FH-PMLSM.

关 键 词：Halbach永磁直线同步电机 分层解析模型 分数槽集中绕组 分布卡式系数 磁场计算 

分 类 号：TM359.4[电气工程—电机]