A study on the shape of iron-core for a hybrid electro-magnetic suspension system

Young Jin Hwang, Jae Young Jang, Sukjin Choi, Jin Bae Na, Hyun Chul Jo, Chang Young Lee, Tae Kuk Ko

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1 Citation (Scopus)


This paper deals with the shape design of the iron-core of a hybrid EMS (electro-magnetic suspension) system. A proto-type hybrid EMS system was developed by Yonsei University in 2010 ,. It is the first step of study on fundamental technology for advanced railroad systems development. The hybrid EMS system requires cooling systems because it uses superconducting magnets ,. These cooling systems can influence costs to making and operating the hybrid EMS system. Therefore, a study to reduce the number of cooling systems needs to be carried out in order to economically commercialize the hybrid EMS system. In this paper, a method that reduces the number of cooling systems of the hybrid EMS system was proposed. To achieve this, a small-scale iron-core and coils assembly was fabricated. Using this system, characteristics of levitation force according to the structure of the iron-core was evaluated. Also, numerical analysis using the FEM tool in order to evaluate the levitation force and net force of a full-scale model was performed. This paper can be expected to suggest useful data for the design of a hybrid EMS system.

Original languageEnglish
Article number6109336
JournalIEEE Transactions on Applied Superconductivity
Issue number3
Publication statusPublished - 2012

Bibliographical note

Funding Information:
Manuscript received September 12, 2011; accepted December 12, 2011. Date of publication December 20, 2011; date of current version May 24, 2012. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (2011-0020401). Y. J. Hwang, J. Y. Jang, S. Choi, J. B. Na, H. C. Jo, and T. K. Ko are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Korea (e-mail: tkko@yonsei.ac.kr). C. Y. Lee is with Korea Railroad Research Institute, Woram Dong, Uiwang Si 437-757, Korea (e-mail: cylee@krri.re.kr). Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2011.2180280

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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