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Title: New levitation scheme with AC superconducting magnet for EDS MAGLEV system

Abstract

This paper proposes a new magnetic levitation scheme which is able to generate levitation force for all speeds including a standstill. Auxiliary wheels which are needed in EDS MAGLEV vehicle can be eliminated. This scheme uses AC superconducting magnets to generate levitation force. In this paper, magnetic fields, forces and power dissipations generated by AC magnets moving above a conducting slab are calculated analytically. Results of calculation show characteristics of EDS system with AC magnet, such as levitation force and loss, are superior to those of EDS system with DC magnets for all speeds.

Authors:
; ;  [1];  [2]
  1. Seoul National Univ. (Korea, Republic of). Dept. of Electrical Engineering
  2. Soonchunhyang Univ., Choongnam (Korea, Republic of). Dept. of Electrical Engineering
Publication Date:
OSTI Identifier:
403182
Report Number(s):
CONF-960425-
Journal ID: IEMGAQ; ISSN 0018-9464; TRN: IM9651%%217
Resource Type:
Journal Article
Resource Relation:
Journal Name: IEEE Transactions on Magnetics; Journal Volume: 32; Journal Issue: 5Pt2; Conference: 1996 IEEE international magnetics conference, Seattle, WA (United States), 9-12 Apr 1996; Other Information: PBD: Sep 1996
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; LEVITATED TRAINS; DESIGN; SUPERCONDUCTING MAGNETS; ENERGY LOSSES; PERFORMANCE; COMPARATIVE EVALUATIONS; DRAG; THEORETICAL DATA

Citation Formats

Kim, D.H., Lee, J.K., Hahn, S.Y., and Cha, G.. New levitation scheme with AC superconducting magnet for EDS MAGLEV system. United States: N. p., 1996. Web.
Kim, D.H., Lee, J.K., Hahn, S.Y., & Cha, G.. New levitation scheme with AC superconducting magnet for EDS MAGLEV system. United States.
Kim, D.H., Lee, J.K., Hahn, S.Y., and Cha, G.. Sun . "New levitation scheme with AC superconducting magnet for EDS MAGLEV system". United States. doi:.
@article{osti_403182,
title = {New levitation scheme with AC superconducting magnet for EDS MAGLEV system},
author = {Kim, D.H. and Lee, J.K. and Hahn, S.Y. and Cha, G.},
abstractNote = {This paper proposes a new magnetic levitation scheme which is able to generate levitation force for all speeds including a standstill. Auxiliary wheels which are needed in EDS MAGLEV vehicle can be eliminated. This scheme uses AC superconducting magnets to generate levitation force. In this paper, magnetic fields, forces and power dissipations generated by AC magnets moving above a conducting slab are calculated analytically. Results of calculation show characteristics of EDS system with AC magnet, such as levitation force and loss, are superior to those of EDS system with DC magnets for all speeds.},
doi = {},
journal = {IEEE Transactions on Magnetics},
number = 5Pt2,
volume = 32,
place = {United States},
year = {Sun Sep 01 00:00:00 EDT 1996},
month = {Sun Sep 01 00:00:00 EDT 1996}
}
  • The PLG (combined Propulsion, Levitation and Guidance) method was proposed for a more favorable Maglev ground coil system, combining the functions of propulsion, levitation, and guidance of the vehicle into one coil. Research and development is currently being conducted on this method. In this paper, the characteristics of a newly-structured system for the PLG method is examined. The discussed characteristics include propulsion, levitation-guidance, vehicle dynamics in the cases of problems with the superconducting magnets, and the magnetic field on board the vehicle.
  • Discusses the stability of an AC induction levitation system, focusing on the analysis and optimum design of the secondary conductor. Several improved secondary conductor geometries are considered. A theoretical model with numerical results, as well as experimental observations and data are presented. Theoretical and experimental results indicate that only marginal stability can be achieved with a single-plate secondary conductor. Modifications of the single plate can enhance its stability at rest, but this design suffers from longitudinal instabilities when propelled. It is concluded that a double-plate secondary conductor is stable in all six degrees of freedom.
  • Magnetically levitated vehicles (Maglev) using superconducting magnets have been under development in Japan for the past 23 years. The superconducting magnets for the Maglev system are used in a special environment compared to other applications. They have to work stably subject to both mechanical and electromagnetic disturbances. The brief history of the Maglev development in Japan, the planning of new test line, the superconducting magnet`s stability and the on board refrigeration system will be presented.
  • An analysis of the Japanese maglev system which uses only one set of coils in the guideway for combined levitation, propulsion, and guidance functions is presented in this paper. This preliminary study, using the dynamic circuit approach, indicates that the system is very promising.
  • An analysis of a Japanese maglev system that uses only one set of coils in the guideway for combined levitation, propulsion, and guidance functions is presented. This preliminary study, using the dynamic circuit approach, indicates that the system is very promising.