Superconducting Cryogenic Motors

  • K. F. Schoch
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 6)


The recent development of superconducting magnetic bearings of high load-carrying characteristics has led to the design of cryogenic motors which have essentially no internal losses from either mechanical or electrical sources. Small synchronous motors have been operated with the superconducting rotor in liquid helium, helium gas or in high vacuums. This paper will discuss some of the superconducting principles involved in the design of small reversible shaftless motors capable of prolonged high-speed operation while in a high vacuum, Motors of this type offer an unusually high degree of constancy of performance, which makes their use in cryogenic gyroscopes appear attractive, Undoubtedly numerous other applications exist. Only brief reference will be made to the superconducting bearings used in these motors since this subject is discussed in a recent paper by T. A. Buchhold [1] and also by I. Simon [2].


Liquid Helium Flux Line Magnetic Bearing Rotor Surface General Electric Company 
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  1. 1.
    T. A. Buchhold, “Applications of superconductivity,” Scientific American (March 1960),Google Scholar
  2. 2.
    L Simon, “Forces applied on superconductors in magnetic fields,” J. Appl. Phys., Vol. 24, No. 1 (January 1953).CrossRefGoogle Scholar
  3. 3.
    D Schoenberg, “Superconductivity,” Cambridge University Press, 2nd Ed. (1952).Google Scholar

Copyright information

© Springer Science+Business Media New York 1961

Authors and Affiliations

  • K. F. Schoch
    • 1
  1. 1.General Electric CompanySchenectadyUSA

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