skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Forces on a magnet moving past figure-eight coils

Abstract

Considerable attention has been given to the magnetic levitation of vehicles over guideways consisting of periodically-spaced conducting coils. Examples of proposed guideway configurations include arrays of independent coils (''loop track''), interconnected coils (''ladder track''), two layers of coils (double-layer ''null-flux'' track), and figure-eight coils (single-layer ''null-flux'' track). Typically, widely-separated superconducting magnets are mounted in the vehicle. A system that achieves both lift and guidance from vertical figure-eight coils in the guideway sidewalls has been developed in Japan. This system, when well designed, can have a very large lift-to-drag ratio. The authors conducted an experimental and theoretical investigation of the lift, drag, and guidance forces on a permanent magnet moving close to various arrays of figure-eight coils. The measured time-histories of the forces provide a basis for the evaluation of electrodynamic models and codes developed to analyze the magnetic levitation of vehicles using the discrete suspension coils of the null-flux type. Good correlation was found between the experimental data and the predictions of the code COIL GDWY. The authors report some of the results and discuss their application to the design of maglev systems.

Authors:
; ;  [1];  [2]
  1. Argonne National Lab., IL (United States)
  2. Northern Illinois Univ., De Kalb, IL (United States). Dept. of Physics
Publication Date:
OSTI Identifier:
6826623
Report Number(s):
CONF-930416-
Journal ID: ISSN 0018-9464; CODEN: IEMGAQ
Resource Type:
Conference
Journal Name:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)
Additional Journal Information:
Journal Volume: 29:6Pt1; Conference: INTERMAG '93: international magnetics conference, Stockholm (Sweden), 13-16 Apr 1993; Journal ID: ISSN 0018-9464
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; LEVITATED TRAINS; DESIGN; C CODES; EXPERIMENTAL DATA; LEVITATION; MAGNET COILS; MATHEMATICAL MODELS; THEORETICAL DATA; COMPUTER CODES; DATA; ELECTRIC COILS; ELECTRICAL EQUIPMENT; EQUIPMENT; INFORMATION; NUMERICAL DATA; TRAINS; VEHICLES; 330300* - Advanced Propulsion Systems- Electric-Powered Systems

Citation Formats

Mulcahy, T M, He, J, Rote, D M, and Rossing, T D. Forces on a magnet moving past figure-eight coils. United States: N. p., 1993. Web.
Mulcahy, T M, He, J, Rote, D M, & Rossing, T D. Forces on a magnet moving past figure-eight coils. United States.
Mulcahy, T M, He, J, Rote, D M, and Rossing, T D. Mon . "Forces on a magnet moving past figure-eight coils". United States.
@article{osti_6826623,
title = {Forces on a magnet moving past figure-eight coils},
author = {Mulcahy, T M and He, J and Rote, D M and Rossing, T D},
abstractNote = {Considerable attention has been given to the magnetic levitation of vehicles over guideways consisting of periodically-spaced conducting coils. Examples of proposed guideway configurations include arrays of independent coils (''loop track''), interconnected coils (''ladder track''), two layers of coils (double-layer ''null-flux'' track), and figure-eight coils (single-layer ''null-flux'' track). Typically, widely-separated superconducting magnets are mounted in the vehicle. A system that achieves both lift and guidance from vertical figure-eight coils in the guideway sidewalls has been developed in Japan. This system, when well designed, can have a very large lift-to-drag ratio. The authors conducted an experimental and theoretical investigation of the lift, drag, and guidance forces on a permanent magnet moving close to various arrays of figure-eight coils. The measured time-histories of the forces provide a basis for the evaluation of electrodynamic models and codes developed to analyze the magnetic levitation of vehicles using the discrete suspension coils of the null-flux type. Good correlation was found between the experimental data and the predictions of the code COIL GDWY. The authors report some of the results and discuss their application to the design of maglev systems.},
doi = {},
journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)},
issn = {0018-9464},
number = ,
volume = 29:6Pt1,
place = {United States},
year = {1993},
month = {11}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: