Element Rating and Coupling Harmonics in a Superconductive Energy Transfer System

  • R. S. Ramshaw
  • E. P. Dick
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 21)


A superconducting system of coupled coils to transfer energy reversibly to an inductive load was proposed by Smith [1]. Various modifications using transformers [2,3] and switching [4] followed in an effort to reduce the total system energy. However, a companion paper [5] compares various transfer schemes and finds the energy rating of the coil elements is still three times larger than those of other systems. This fact suggests that element rating rather than system energy should be optimized. Second, it is considered that the transfer speed could be increased by using nonsinusoidal coil coupling, still maintaining the zero-torque constraint. Finally, experiments in the laboratory led to an interest in the effect of superconductive losses and coupling harmonics on torque requirements.


Load Current Flux Linkage Torque Ripple Element Rate Stator Coil 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    P. F. Smith, in: Proceedings of the Summer Study on Superconducting Devices, Brookhaven, New York (1968), p. 589.Google Scholar
  2. 2.
    P. F. Smith, Particle Accelerators 1:155 (1970).Google Scholar
  3. 3.
    K. I. Thomassen, “Reversible Magnetic Energy Transfer and Storage Systems,” Los Alamos Scientific Laboratory, New Mexico, Rept. LA-DC-72–1325 (November 1972).Google Scholar
  4. 4.
    P. F. Smith, in: Proceedings of the Eighth Intern. Conf. on High Energy Accelerators, CERN (1971), 213.Google Scholar
  5. 5.
    R. S. Ramshaw and E. P. Dick, in: Advances in Cryogenic Engineering, Vol. 21, Plenum Press, New York (1976), p. 149.Google Scholar

Copyright information

© Springer Science+Business Media New York 1960

Authors and Affiliations

  • R. S. Ramshaw
    • 1
  • E. P. Dick
    • 1
  1. 1.University of WaterlooWaterlooCanada

Personalised recommendations