VALIDITY AND THE LIMITATIONS OF THE AC IMPEDANCE-MODELING TECHNIQUE IN ELECTRODYNAMIC LEVITATION SYSTEMS

Because the impedance-modeling technique is a convenient tool, it is used often (and sometimes incorrectly) for the prediction of forces in electrodynamic levitation systems. In spite of its widespread applications, the techniques rest on flimsy theoretical foundations. This paper presents force formulas, derived from the dynamic circuit theory, which establish both the validity and the limitations of the technique. The cases of a holonomic and a nonholonomic guideway are treated. The method of equivalencing frequency to velocity is found to be incorrect algebraically. The extent to which approximate equivalence of frequency to velocity can be relied on, is demonstrated by numerical examples.

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  • Corporate Authors:

    Institute of Electrical and Electronics Engineers

    3 Park Avenue, 17th Floor
    New York, NY  USA  10016-5997
  • Authors:
    • Jain, O P
    • Ooi, B T
  • Publication Date: 1979-7

Media Info

  • Features: References;
  • Pagination: p. 1169
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00311046
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: Vol. MAG-15
  • Files: TRIS
  • Created Date: Jun 9 1980 12:00AM