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Experiment of force‐balanced coil for magnetic energy storage
Author(s) -
Sato Yoshihisa,
Kondoh Junji,
Shimada Ryuichi,
Kyouto Makoto,
Hanai Satoshi,
Hamajima Takataro
Publication year - 1999
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(199908)128:3<82::aid-eej10>3.0.co;2-t
Subject(s) - electromagnetic coil , magnetic field , superconducting magnetic energy storage , magnetic energy , energy storage , electromagnetic field , toroid , electrical engineering , stored energy , current (fluid) , superconductivity , physics , nuclear magnetic resonance , superconducting magnet , engineering , materials science , condensed matter physics , magnetization , nuclear physics , power (physics) , plasma , quantum mechanics , metallurgy
Higher magnetic field is of great advantage to superconducting magnetic energy storage because it promises a compact device. However, it does not affect the serious problem of huge electromagnetic forces caused by high magnetic fields and large coil current. Electromagnetic stresses, reaching as much as several hundred bars, thus become a major factor in determining whether a large‐size strong magnetic field system can be established. In order to solve this problem, we have proposed the force‐balanced coil (FBC) concept that reduces the huge centering electromagnetic forces by balancing them with the hoop forces caused by the toroidal current. Then we designed and fabricated a small‐size superconducting FBC system to demonstrate the FBC concept. It was successfully excited up to near rated current. It is shown that the FBC system has the potential for simplifying the supporting structures and making the facility compact. © 1999 Scripta Technica, Electr Eng Jpn, 128(3): 82–91, 1999