Investigation of Forces and Secondary Losses in Linear Induction Motor With the Solid and Laminated Back Iron Secondary for Metro
Investigation of Forces and Secondary Losses in Linear Induction Motor With the Solid and Laminated Back Iron Secondary for Metro
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地铁用实心叠片背铁二次直线感应电机的受力和二次损耗研究
DOI：
10.1109/tie.2016.2565442
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发表时间：
2017-06
影响因子：
7.7
通讯作者：
Liu Zhiming
中科院分区：
文献类型：
--
作者：
Lv Gang;Zeng Dihui;Zhou Tong;Liu Zhiming
在本文中，两种主要的次级，即，采用有限元法计算了直线电机二次侧电磁力和二次侧损耗。首先，在求解域中，推导出了次级有涡流时磁场的基本方程，给出了SLIM各部分的具体边界条件。给出了二次损耗和二次效率的计算公式。其次，分别对两种次级形式的120 kW地铁用直线感应电机进行了三维有限元计算。分析了二次护铁中不同叠片数时的效率和二次损耗。最后得到了护铁叠片的最佳数量。第三，考虑端部效应和边缘效应的影响，计算了不同次谐波时的气隙磁密。然后，分析了两种次级结构的直线电机的推力和垂向力。最后，通过在直线感应电机试验台上的测量，验证了在不同时间段获得的效率、推力和垂向力的数值计算结果。
In this paper, two main kinds of the secondary, i.e., the solid and laminated back iron secondary, are applied in linear metro, as well as electromagnetic forces and secondary losses of the single-sided linear induction motor (SLIM) with different secondary are calculated by the finite-element method (FEM). First, in solving region, the fundamental equations of the magnetic field with eddy currents in the secondary are deduced, and specific boundary conditions for each part of SLIMs are given. Equations of the secondary loss and efficiency are presented. Second, 120-kW SLIMs with two types of the secondary for metro are calculated by the three-dimensional FEM, respectively. The efficiency and secondary loss are analyzed for different numbers of the lamination in the secondary back iron. The optimal number of the back iron lamination is then obtained. Third, considering the influence of the end and edge effect, the air gap flux density with different secondaries is calculated. Then, the thrust and vertical force are analyzed for SLIMs with two kinds of the secondary. Finally, numerical results of the efficiency, thrust, and vertical force, which are obtained from different secondaries, are experimentally validated by measurement on the test rig of the SLIM.
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