Open AccessEstimation of electricity storage capacity of compact SMESs composed of stacks of Si-wafers loaded with superconducting thin film coils in spiral trenches formed by MEMS process
Author(s) -
Y. Ichiki,
Akihisa Ichiki,
Tatsumi Hioki,
Minoru Sasaki,
Joo–Hyong Noh,
Osamu Takai,
Hideo Honma,
Motohiro Tagaya
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1293/1/012058
Subject(s) - wafer , superconducting magnetic energy storage , microelectromechanical systems , energy storage , materials science , spiral (railway) , superconductivity , electromagnetic coil , magnetic flux , magnetic field , stress (linguistics) , electrical engineering , optoelectronics , mechanical engineering , superconducting magnet , condensed matter physics , engineering , power (physics) , physics , linguistics , philosophy , quantum mechanics
A method to estimate the electricity storage capacity of our compact superconducting magnetic energy storage system composed of stacks of Si-wafers loaded with superconducting thin film coils in spiral trenches formed by MEMS process was developed and tested for initial 6 designs of wafer coils. The results show energy storage density as low as around 6 Wh/ℓ. This is not caused by the limitation of the hoop stress but by the limitation of the maximum magnetic flux density. Further calculations for optimum wafer coil designs will be continued in which the effect of the maximum magnetic flux energy and the effect of the maximum hoop stress on the limit of the amount of the electrical energy storage come into a good balance.