EQUILIBRIUM DYNAMICS AND STABILITY OF NULL-FLUX, BRAKE-FLUX, AND DOUBLE-TRACK, NORMAL-FLUX ELECTRODYNAMIC LEVITATION SYSTEMS

Three electrodynamic levitation schemes frequently suggested as alternatives to the normal-flux, single-track schemes are theoretically examined. The analysis concentrates on the null-flux design. Comments regarding the brake-flux and double-track, normal-flux schemes are made by analogy only. The zero-torque equilibrium of a system under the influence of an external driving force is considered. The often-used zero-pitch assumption is refuted. Lift, drag, and the lift-to-drag ratio as a function of the dynamic equilibrium suspension positions are calculated. The equilibrium equations of motion are expanded to include small perturbations and the results are used to analyze the stability of the equilibrium suspension positions with regard to external distributions. The analysis shows that substantial heave mode suppression is possible with the alternative systems. A comparison is made with the normal-flux, single-track model characteristics.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00189464
• Corporate Authors:

  Institute of Electrical and Electronics Engineers (IEEE)

  3 Park Avenue, 17th Floor
  New York, NY  United States  10016-5997
• Authors:
  • Hogan, J R
  • Fink, H J
• Publication Date: 1979-9

Media Info

• Features: References;
• Pagination: p. 1354
• Serial:
  • IEEE Transactions on Magnetics
  • Publisher: Institute of Electrical and Electronics Engineers (IEEE)
  • ISSN: 0018-9464

Subject/Index Terms

• TRT Terms: Dynamics; Equations of motion; Guideways; Magnetic levitation; Stability (Mechanics)
• Old TRIS Terms: Guideway dynamics
• Subject Areas: Public Transportation; Railroads; Terminals and Facilities;

Filing Info

• Accession Number: 00316235
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: MAG-15 No. 5
• Files: TRIS
• Created Date: Sep 16 1980 12:00AM