Magnetic Field and Force Calculation in Linear Permanent-Magnet Synchronous Machines Accounting for Longitudinal End Effect
Magnetic Field and Force Calculation in Linear Permanent-Magnet Synchronous Machines Accounting for Longitudinal End Effect
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DOI：
10.1109/tie.2016.2594793
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发表时间：
2016-07
影响因子：
7.7
通讯作者：
Hengzai Hu;Jing Zhao;Xiangdong Liu;Youguang Guo
中科院分区：
文献类型：
--
作者：
Hengzai Hu;Jing Zhao;Xiangdong Liu;Youguang Guo
本文提出了一种改进的分析方法，用于预测线性永磁同步电机（LPMSMs）的磁场和力的同时考虑初级端部效应和次级端部效应。目前，大部分研究都是在直角坐标系下计算直线永磁同步电机的磁场，而采用周期性边界来忽略端部效应。在本文中，实施的分析模型，提出了一个极坐标表示的机器几何形状和子域法应用于计算磁场。然后，根据所建立的模型，基于麦克斯韦应力理论计算切向推力和法向力。随后通过有限元方法得到数值结果，并用于验证分析模型。最后，制作了LPMSM样机并进行了实验。结果表明，所建立的解析模型具有较高的预测精度。
This paper presents an improved analytical method for predicting the magnetic field and forces in linear permanent-magnet synchronous machines (LPMSMs) accounting for both the primary end effect and secondary end effect. So far, the magnetic field calculation of LPMSM in most studies is conducted in Cartesian coordinate, whereas the end effect is neglected by applying periodic boundary. In this paper, to implement the analytical model, a polar presentation of the machine geometry is proposed and the subdomain method is applied to calculate the magnetic field. Then, according to the developed model, the tangential thrust and normal forces are calculated based on the Maxwell stress theory. Numerical results are subsequently obtained by finite-element method and employed to validate the analytical model. Finally, an LPMSM prototype is manufactured and experiments are conducted. The results show that the developed analytical model has high accuracy for predicting the magnetic field and forces.