Abstract：The EDS maglev considered is mainly made up of linear PM Halbach arrays and conducting sheet as the guideway. Lift and drag forces of the EDS system result form interaction between eddy-current of conducting sheet and the PM magnetic fields. This paper establishes a simplified two-dimensional model, and studies the dynamic characteristic of the maglev, then deduces differential equations from Maxwell equations. On the basis of the equations, it obtains lift and drag forces and L/D expressions. In the end it presents comparisons among the analytical results and those from Ansoft and from experiment. This paper indicates that the two-dimensional model is applicable and the testing apparatus is also rationally designed. The analysis and test are necessary for further EDS maglev project.
李春生, 杜玉梅, 夏平畴, 严陆光. 直线型Halbach磁体和导体板构成的电动式磁悬浮系统的分析及实验[J]. 电工技术学报, 2009, 24(1): 18-22.
Li Chunsheng, Du Yumei, Xia Pingchou, Yan Luguang. Analysis and Experimental Testing of EDS Maglev With Linear Halbach and Conducting Sheet. Transactions of China Electrotechnical Society, 2009, 24(1): 18-22.
[1] Post R F, Ryutov D D. The inductrack: a simpler approach to magnetic levitation [J]. IEEE Transactions on Superconductivity, 2000, 101(3): 901-904. [2] Montgomery D B. Overview of the 2004 magplane design [C]. Maglev’2004, Shanghai, 2004: 106-113. [3] Wang P J, Chiueh S J. Analysis of eddy-current brakes for high speed railway[J]. IEEE Transactions on Magnetics, 1998, 34(7): 1237-1239. [4] Fujita M, Tokumasu T, Yamada T. 3-dimensional electromagnetic analysis and design of an eddy- current rail brake system[J]. IEEE Transactions on Magnetics, 1998, 34(9): 3548-3551. [5] Jang S M, Jeong S S, Cha S D. The application of linear halbach array to eddy current rail brake sys- tem[J]. IEEE Transactions on Magnetics, 2001, 37(7): 2627-2629. [6] JangS M, Lee S H, Jeong S S. Characteristics analysis of eddy-current brake system using the linear Halbach array[J]. IEEE Transactions on Magnetics, 2002, 38(9): 2994-2996. [7] Jang S M, Kwon J K, Sung-Ho Lee, et al. Char- acteristic analysis of linear eddy-current brakes[C]. IEEE CNF Electrical Machines and Systems, 2003, ICEMS 2003, Sixth International Conference, 2003, 1: 177-179. [8] Gay S E, Ehsani M. Analysis and experimental testing of a permanent magnet eddy-current brake[C]. Vehicle Power and Propulsion, 2005 IEEE Confer- ence, 2005: 756-765. [9] Bird J, Lipo T A. An electrodynamic wheel: an integrated propulsion and levitation machine[C]. Electric Machines and Drives Conference, IEMDC'03, IEEE International, 2003: 1410-1416. [10] Bird J, Lipo T A. The experimental verification of the lift, thrust and guidance forces created by electrodynamic wheel rotating over a split-sheet guideway[C]. Maglev’2006, Dresden Germany, 2006: 1-9. [11] 刘国强, 赵凌志, 蒋继娅. Ansoft工程电磁场有限元分析[M]. 北京: 电子工业出版社, 2005. [12] Kratz R, Post R F. A null-current electro-dynamic levitation systems[J]. IEEE Trans on Applied Superconductivity, 2002, 12(3): 930-932.
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