[2] [2] BUDIG P K. The application of linear motors, power electronics and motion control conference[C].Proceedings. PIEMC 2000. The Third International ,2000:1336-1341.

[4] [4] YOSHIDA K, MATSUMOTO H. Electromagnetic force analysis of HTS bulk in DC-magnetic fields due to electromagnet[C].Physica C Volume, 2002:848-852.

[5] [5] BUCCI G. Experimental comparison between direct and indirect measurement techniques for the characterization of linear induction motors[J]. Measurement , 1997,21(2):47-56.

[6] [6] CLARK R E,JEWELL G W,HOWE D. Finite element analysis of short-stroke linear motors and actuators, Current Trends in the use of finite elements (FE) in electromechanical design and analysis[J]. IEEE Seminar,2000,(14):1-8.

[7] [7] IDIR K,DAWSON G E,EASTHAM A R. Modeling and performance of linear induction motor with saturable primary[J]. Industry applications IEEE Transactions on,1993,29(6):1123-1128.

[9] [9] EDMINISTER J. A: Schaum's outlines theory and problems of electromagnetics [M]. Second Edition,1995.

[10] [10] ONUKI T, KAMIYA Y, FUKAYA K, et al . Characteristics analysis of linear induction motor with two types of secondary structure based on electromagnetic field and electric circuit analysis[J]. Magnetics, IEEE Transactions on,1999, 35(5):4022-4024.

[11] [11] AHN S CH,HO LEE J,HYUN D S. Dynamic characteristic analysis of LIM using coupled FEM and control algorithm[J]. Magnetics, IEEE Transactions on ,2000,36(4):1876-1880.

[14] [14] ADAMIAK K. Application of impedance boundary conditions in finite element[J]. IEEE Transactions on Magnetics, 1991,27(6):5193-5195.

[15] [15] LEE J H, SUNG CH A,DONG S H. Dynamic characteristic analysis of vector controlled LIM by finite element method and experiment, Industry applications conference[C].Thirty-Third IAS Annual Meeting, 1998:799-806.