Abstract：The structure design and primary winding arrangment of a high temperature superconductor linear induction motor (HTS LIM) are discussed in detail. The relationship curve between the critical current and background field of the HTS tape is given. Using the finite element analysis software Maxwell the electromagnetic properties of the HTS LIM are analyzed. And the key parameters such as the primary coil number, primary slot height and primary slot width are sweeped and optimized. The influence of these key parameters on the thrust force, primary slot leakage flux and critical current of the HTS LIM is also analyzed. Based on the analysis the optimal design method is proposed. According to the structure and the parameters of the HTS LIM a prototype linear induction motor with copper primary windings is manufactured. The thrust force of the prototype motor is tested with different currents and speeds. Comparing the test results with the simulation results a modified coefficient of the thrust is obtained. This coefficient is meaningful for studying the thrust force with different motor parameters.
[1] Yoshida K, Matsumoto H. Propulsion and guidance simulation of HTS bulk linear synchronous motor taking into account E-J characteristic[J]. Physica C: Superconductivity, 2003(392-396): 690-695. [2] Stumberger G, Aydemir M T, Zarko D, et al. Design of a linear bulk superconductor magnet synchronous motor for electromagnetic aircraft launch systems[J]. IEEE Trans. on Applied Superconductivity, 2004, 14(1): 54-62. [3] Guo Youguang, Jin Jianxun, Zhu Jianguo, et al. Design and analysis of a prototype linear motor driving system for HTS maglev transportation[J]. IEEE Trans. on Applied Superconductivity, 2007, 17(2): 2087-2090. [4] Sugimoto H, Tsuda T, Morishita T, et al. Development of an axial flux type pm synchronous motor with the liquid nitrogen cooled HTS Armature windings[J]. IEEE Trans. on Applied Superconductivity, 2007, 17(2): 1637-1640. [5] Song M K, Lee S J, Yoon Y S, et al. The characteristic analysis of the flux damper located in HTS synchronous motor through 3-dimensional magnetic field analysis using FEM[J]. Physica C: Superconductivity, 2000 (341-348): 2601-2602. [6] Sugimoto H, Tsuda T, Morishita T, et al. Design of an axial flux inductor type synchronous motor with the liquid nitrogen cooled field and armature HTS windings[J]. IEEE Trans. on Applied Superconductivity, 2007, 17(2): 660-663. [7] Kim W S, Jung S Y, Choi H Y, et al. Development of a superconducting linear synchronous motor[J]. IEEE Trans. on Applied Superconductivity, 2002, 12(1): 842-845. [8] Zheng Luhai, Jin Jianxun. Investigation of HTS bulk magnet linear synchronous motors[C]. International Conference on Applied Superconductivity and Electromagnetic Devices, Chengdu, China, 2009: 17-21. [9] Masson P J, Pienkos J E, Luongo C A. Scaling up of HTS motor based on trapped flux and flux concentration for large aircraft propulsion[J]. IEEE Trans. on Applied Superconductivity, 2007, 17(2): 1579-1582. [10] Jiang Yudong, Pei R, Xian W, et al. Magnetization process of an HTS motor and the torque ripple suppression[J]. IEEE Trans. on Applied Superconductivity, 2009, 19(3): 1644-1647. [11] Selcuk A H, Kurum H. Investigation of end effects in linear induction motors by using the finite-element method[J]. IEEE Trans. on Magnetics, 2008, 44(7): 1791-1795. [12] Isfahani A H, Ebrahimi B M, Lesani H. Design optimization of a low-speed single-sided linear induction motor for improved efficiency and power factor[J]. IEEE Trans. on Magnetics, 2008, 44(2): 266-272.
2011, Vol. 26 
