A Method for the High Energy Density SMES—Superconducting Magnetic Energy Storage

  • Y. Mitani
  • Y. Murakami

Abstract

The energy density of superconducting magnetic energy storage (SMES), 107 [J/m3] for the average magnetic field 5T is rather small compared with that of batteries which are estimated as 108 [J/m3]. This paper describes amethod for the high density SMES on supposition of the use of novel superconductorswhose critical current and magnetic field are far more larger than the conventionalones. We propose an integration of solenoids of long axial lengths with small diameters. The calculation results show that the energy density can be increased up to 4 or 5 x 107 [J/m3] with the magnetic field of 20 [T] and the mechanical stress is kept in the allowable limits even in this high density of magnetic field.

Keywords

Magnetic Field Axial Length High Energy Density Hoop Stress Allowable Limit 
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References

  1. 1.
    Wilson, M.N., Superconducting Magnets, Clarendon Press Oxford, New York, 1983.Google Scholar
  2. 2.
    Grover, F.W., Calculation of Mutual Induc tance and Self Inductance, Dover Publications, Inc., New York, 1946, pp.228–234.Google Scholar

Copyright information

© The Institute of Electrical Engineers of Japan 1990

Authors and Affiliations

  • Y. Mitani
    • 1
  • Y. Murakami
    • 1
  1. 1.Osaka UniversitySuita, Osaka, 565Japan

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