Author(s)

Guan Liu, Ji Li^*

Affiliation(s)

Engineering Research Center of Maglev Technology, National University of Defense Technology, Changsha, 410073, China.

Corresponding Author

Ji Li

ABSTRACT

A conventional AC linear machine for the electromagnetic launcher has a problem of low-efficiency. This paper presents a superconducting DC linear motor (SDCLM) to improve the energy-efficient of system for superhigh velocity electromagnetic launch. The operation principle and conception model are introduced. Detailed analytical formulas for magnetic force are presented. The static thrust versus position and dynamics launch process characteristics are simulated and computed. The result indicates that the superconducting DC linear motor offers outstanding efficiency merit as energy-efficient direct linear electric drives propelling large loading for electromagnetic launch system. Finally, a thrust control of superconducting DC linear motor (SDCLM) based on current compensation was proposed to minimum thrust fluctuant. The controller is designed based on the relationship between current and back-EMF, and the control scheme is assessed through simulation study.

KEYWORDS

DC Linear Motor; Energy-Efficient; Large Loading; Electromagnetic Launch; Thrust Control; Current Compensation.

CITE THIS PAPER

Liu Guan, Li Ji. Design and control of a superconducting DC linear motor for electromagnetic launch system. Journal of Computer Science and Electrical Engineering. 2019, 1(1): 1-8.

REFERENCES

[1]Skurdal D. B., Randy L. G., 2009. Multimission electromagnetic launcher, IEEE Trans. Magn., 45(1): 458-461. 10.1109/TMAG.2008.2008551

[2]Patterson D., Monti A., Brice C. et al., 2002. Design of a linear bulk superconductor magnet synchronous motor for electromagnetic aircraft launch system, in Proc. 37th IAS Annual Meeting, 1950-1957. 10.1109/TASC.2004.824342

[3]Stumberger G., Mehmet T. A., Damir Z. et al., 2004.  Design of a linear bulk superconductor magnet synchronous motor for electromagnetic aircraft launch, IEEE Trans. Appl. Superconduct., 14(1): 54-62.10.1109/TASC.2004.824342.

[4]Doyle M. R., Samuel D. J., Conway T.,et al. 1995. Electromagnetic aircraft launch system-EMALS, IEEE Trans. Magn., 31(1): 528-533.10.1109/20.364638.

[5]Cho H. W., Sung H.-K., Sung S.Y., et al. 2008. Design and characteristic analysis on the short-stator linear synchronous motor for high-speed maglev propulsion, IEEE Trans. Magn., 44(11):4369-4372.10.1109/TMAG.2008.2001511.

[6]Jin H. L., Jeongmin J., Youngjae H., et al., 2014. Development of the linear synchronous motor propulsion tested for super speed maglev, in Proc. 16th ICEMS, 1936-1938.10.1109/ICEMS.2013.6713223.

[7]Sen P., 1975. On linear synchronous motor (LSM) for high speed propulsion, IEEE Trans. Magn., 11(5): 1484-1486.10.1109/TMAG.1975.1058873.

[8]Jun E., 2004. The novel power supply system in the yamanashi maglev test line, in Proc. 18th 21th International Conference on Magnetically Levitaion System and Linear Drives, 451-454.

[9]Sakamoto, Shigeru, Hiroyuki W., et al. 1997. Development of a maglev superconducting magnet for the Yamanashi test line in Japan vibration characteristics and analysis for design, IEEE Trans. Appl. Superconduct., 7(3):3791-3796. 10.1109/77.622976.

[10]Kazuo S., 1996. Development of magnetically levitated high speed transport system in Japan, IEEE Trans. Magn., 32(4):2230-2235.10.1109/20.508609.

[11]Kaiji S., Tadashi H., 2014. High-speed positioning of ultrahigh-acceleration and high-velocity linear synchronous motor, International Journal of Precision Engineering and Manufacturing, 15(8):1537-1544. https://doi.org/10.1007/s12541-014-0502-y.

[12]Turman B. N., Marder B. M., Rohwein G. J., et al, 1995. The pulsed linear induction motor concept for high-speed trains, Sandia National Laboratiories, Livermore, SNL, Rep. SAND95-1268.10.2172/90379.

[13]Takahashi N., 2011. Development of Ground Coil Type of PLG for Maglev, in Proc. 21th International Conference on Magnetically Levitaion System and Linear Drives.

[14]Zhi H. W., Jian X. J., 2014. Characteristic Analysis of HTS Linear Synchronous Generators Designed With HTS Bulks and Tapes, IEEE Trans. Appl. Superconduct., 24(5):1-5.10.1109/TASC.2014.2344766

[15]Luo W.B., Wang Y., Gui Z.X., et al., 2013. Connection Pattern Research and xperimental ealization of Single Stage Multipole Field lectromagnetic Launcher, IEEE Trans. Magn., 41(11):3173-3179.10.1109/TPS.2013.2281240.

[16]Wang S.Z., 2014. The homopolar machine principle applied in ectromagnetic aircraft launch system, Ship Science and Technology, 36(9):150-152.

[17]Umemori T., Kawashima M., Oda M., et al.,1979.  Development of DC Lenear Motor - Fundamental Construction and Feasibility, Transactions on Power Apparatus and Systems, 98(4):1456-1465.10.1109/TPAS.1979.319348.

[18]Daniel A. B., 2010. Holloman High Speed Test Track Maglev Program Update, Holloman Air Force Base, Nashville, AFB, Rep, AIAA 2010-1707.https://doi.org/10.2514/6.2010-1707 .

[19]Hooser M. D., 2010. Holloman High Speed Test Track Magnetically Levitated (MAGLEV) Sled Six Degree-of-Freedom Model, Holloman Air Force Base, Nashville, AFB, Rep, AIAA 2010-1706.

[20]Su Y.H., Langhorn A., Ketchen D., et al., 2009 Magnetic Levitation Upgrade to the Holloman High Speed Test Track, IEEE Trans. Appl. Superconduct., 19(3):2074-2077.10.1109/TASC.2009.2019558.

[21]Su Y.H, Ketchen D., Holland L., Status of the Magnetic Levitation Upgrade to Holloman High Speed Test Track, in Proc. 20th Intern Conf on Magnetically Levitated Systems and Linear Drives.https://doi.org/10.2514/6.2000-2289.

[22]He J.L., Howard C., 1997. Magnetic damping forces in figure-eight-shaped null-flux coil suspension systems, IEEE Trans. Magn., 33(5):4230-4232.10.1109/20.619719.

[23]Haney J.W., Lenzo J., 1996. Issues Associated With A Hypersonic Maglev Sled,  in Proc. 3rd International Symposium on Magnetic Suspension Technology, 607-621.https://ntrs.nasa.gov/search.jsp?R=19960050141.