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

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 to the 2nd power/W(I = magnet current, W = vehicle weight) when the vehicle cruises freely at constant speed. This calculation takes into account losses due to nonuniform 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.

  • Availability:
  • Supplemental Notes:
    • Presented at a meeting, Argonne Nat'l Lab, Ill. and Nat'l Accel Lab, Batavia, Ill., September 30-October 2, 1974.
  • Corporate Authors:

    Institute of Electrical and Electronics Engineers

    3 Park Avenue, 17th Floor
    New York, NY  USA  10016-5997
  • Authors:
    • Hogan, J R
    • Fink, H J
  • Publication Date: 1975-3

Media Info

  • Features: References;
  • Pagination: p. 604-607
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00127632
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: Vol. MAG-11 No. 2 Proc Paper
  • Files: TRIS
  • Created Date: Dec 16 1975 12:00AM