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

Title: Comparison and optimization of lift and drag forces on vehicles levitated by eddy current repulsion for various null and normal flux magnets with one or two tracks

Abstract

Lift and drag forces are compared for various null and normal flux superconducting magnet configurations, where each coil consists of a pair of infinitely long parallel wires separated by a fixed distance. The null-flux configuration has a minimum in the drag to lift ratio for a particular value of I$sup 2$/W (I = magnet current, W = vehicle weight) when the vehicle cruises freely at constant speed. This calculation takes into account losses due to non- uniform eddy-current density distribution in the solid track. Results indicate that the null-flux configuration is the most efficient design, followed by the normal-flux, single track configuration. All other schemes are less efficient for a thin track configuration. A general method is outlined for calculating the zero-torque case. (auth)

Authors:
;
Publication Date:
Research Org.:
Univ. of California, Davis
OSTI Identifier:
4094792
NSA Number:
NSA-33-017061
Resource Type:
Conference
Journal Name:
IEEE Trans. Magn., v. MAG-11, no. 2, pp. 604-607
Additional Journal Information:
Conference: Applied superconductivity conference, Oakbrook, Illinois, USA, 30 Sep 1974; Other Information: See CONF-740957--. Orig. Receipt Date: 30-JUN-76
Country of Publication:
United States
Language:
English
Subject:
N42220* -Engineering-Facilities & Equipment-Cryogenic & Superconducting Equipment & Devices; 330300* -Advanced Automotive Propulsion Systems-Electric- Powered Systems; *LEVITATED TRAINS- SUPERCONDUCTING MAGNETS; *SUPERCONDUCTING MAGNETS- - CONFIGURATION; AERODYNAMICS; COMPARATIVE EVALUATIONS; DRAG; EDDY CURRENTS; EFFICIENCY; ELECTROMAGNETS; OPTIMIZATION

Citation Formats

Hogan, J.R., and Fink, H.J. Comparison and optimization of lift and drag forces on vehicles levitated by eddy current repulsion for various null and normal flux magnets with one or two tracks. United States: N. p., 1975. Web.
Hogan, J.R., & Fink, H.J. Comparison and optimization of lift and drag forces on vehicles levitated by eddy current repulsion for various null and normal flux magnets with one or two tracks. United States.
Hogan, J.R., and Fink, H.J. Sat . "Comparison and optimization of lift and drag forces on vehicles levitated by eddy current repulsion for various null and normal flux magnets with one or two tracks". United States.
@article{osti_4094792,
title = {Comparison and optimization of lift and drag forces on vehicles levitated by eddy current repulsion for various null and normal flux magnets with one or two tracks},
author = {Hogan, J.R. and Fink, H.J.},
abstractNote = {Lift and drag forces are compared for various null and normal flux superconducting magnet configurations, where each coil consists of a pair of infinitely long parallel wires separated by a fixed distance. The null-flux configuration has a minimum in the drag to lift ratio for a particular value of I$sup 2$/W (I = magnet current, W = vehicle weight) when the vehicle cruises freely at constant speed. This calculation takes into account losses due to non- uniform eddy-current density distribution in the solid track. Results indicate that the null-flux configuration is the most efficient design, followed by the normal-flux, single track configuration. All other schemes are less efficient for a thin track configuration. A general method is outlined for calculating the zero-torque case. (auth)},
doi = {},
journal = {IEEE Trans. Magn., v. MAG-11, no. 2, pp. 604-607},
number = ,
volume = ,
place = {United States},
year = {1975},
month = {3}
}

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: