Static characteristics of a novel flux-switching permanent magnet linear motor  

新型磁通切换永磁直线电动机的静态特性(英文)

作　　者：黄磊[1,2] 余海涛[1,2] 胡敏强[1,2] 周士贵[1,2] 刘合祥[1,2] 

机构地区：[1]东南大学电气工程学院,南京210096 [2]东南大学伺服控制技术教育部工程研究中心,南京210096

出　　处：《Journal of Southeast University(English Edition)》2011年第1期26-30,共5页东南大学学报（英文版）

摘　　要：A novel flux-switching permanent magnet linear motor（FSPMLM） is proposed for linear direct driving machine tools.First,the two-and three-dimensional topological configuration of the proposed motor is presented;the basic operational principle of the FSPMLM is introduced;and the magnetic fields at the two typical conditions of no-load are analyzed.Secondly,the FSPMLM is analyzed by the two-dimensional finite element method（FEM） to investigate the static electromagnetic characteristics such as flux-linkage,back EMF（electromotive force） and inductance performances.The cogging forces of two kinds of FSPMLMs with different shaped cores are analyzed and compared,and the results show that the cogging force is significantly reduced by using the E-shaped cores.Additionally,based on the co-energy method,the thrust equation is derived and verified by the simulation results obtained by the FEM.Finally,an experimental prototype is used to test the characteristics under open circuit and load conditions.The simulation and experimental results indicate that the proposed motor has advantages of a sinusoidal back-EMF waveform,a small cogging effect and a high thrust density,and it is suitable for the application of linear direct driving machine tools.提出了一种应用于直线驱动数控机床的新型磁通切换永磁直线电动机.首先,给出了该电机的二维和三维拓扑结构,介绍了该直线电动机的基本工作原理,并分析了2 种典型位置的磁场情况.其次,采用二维有限元的方法,对电机的磁链特性、反电动势特性、电感特性等静态特性进行了深入的研究.对2 种不同铁芯结构磁通切换永磁直线电机的定位力进行了对比分析,结果表明采用E型铁芯机构可有效减少定位力.然后,基于联合能量法推导得到了电机的静态推力计算公式,采用有限元仿真对静态推力计算公式进行了验证分析.最后,通过一台试验样机进行了空载反电动势和负载试验测试.仿真和实验结果表明该电机具有正弦度很好的反电动势、很小的定位力和高的推力密度,适合应用于直线驱动的数控机床.

关 键 词：FLUX-SWITCHING permanent magnet linear motor finite element method static characteristics 

分 类 号：TM359[电气工程—电机]