Enhancement of the Critical Current of Bi-2223 Superconducting Coil by Using of Soft Ferromagnetic Material

  • Meng Song
  • Yajun Xia
  • Tao MaEmail author
Original Paper


The effects of soft ferromagnetic material placed nearby the high-Tc Bi-2223 coil is analyzed. Electro-magnetic simulation have been carried out to find the distributions of the magnetic field of the Bi-2223 coil. The used soft ferromagnetic material could change the distribution of the Bi-2223 coil’s magnetic field, and the transport capability of the Bi-2223 coil changes consequently. According to the simulation results, the thickness of the soft ferromagnetic material plate shows a notable effect on the coil, and the position and width of the plate could present negative effects. Experimental result of a Bi-2223 coil with B30P105 silicon steel plate is consistent with the simulation conclusions, and the critical current of the developed Bi-2223 coil could achieve an improvement of 15% by using of a piece of silicon steel plate with a thickness of 0.3 mm.


Critical current Soft ferromagnetic material Bi-2223 tape 


Funding information

This work was supported in part by the National Key R&D Program of China under Grant No. 2017YFB0902301 and China Southern Power Grid under Grant No. 036100KK52160104.


  1. 1.
    Genenko, Y.A., Snezhko, A., Freyhardt, H.C.: Overcritical states of a superconductor strip in a magnetic environment. Phys. Rev. B 62(5), 3453–3472 (2000)ADSCrossRefGoogle Scholar
  2. 2.
    Genenko, Y.A., Snezhko, A.V., Usoskin, A.: Finite magnetic shields effect on the transport current in superconductor strips. Phys. C 401, 236–240 (2004)ADSCrossRefGoogle Scholar
  3. 3.
    Gömöry, F.: Improvement of the self-field critical current of a high-Tc superconducting tape by the edge cover from soft ferro-magnetic material. Appl. Phys. Lett. 89, 072506 (2006)ADSCrossRefGoogle Scholar
  4. 4.
    Gömöry, F., Souc, J., Vojenciak, M., et al.: Reduction of ac transport and magnetization loss of a high-Tc superconducting tape by placing soft ferromagnetic materials at the edges. Appl. Phys. Lett. 90, 092506 (2007)ADSCrossRefGoogle Scholar
  5. 5.
    Gömöry, F., Souc, J., Seiler, E., et al.: Performance improvement of superconducting tapes due to ferromagnetic cover on edges. IEEE Trans. Appl. Supercond. 17, 3083–3086 (2007)ADSCrossRefGoogle Scholar
  6. 6.
    Solovyov, M., Vojenciak, M., Gömöry, F.: Magnetic field map-ping above the superconducting tape with Ni-covered edges. IEEE Trans. Appl. Supercond. 19(3), 3049–3052 (2009)ADSCrossRefGoogle Scholar
  7. 7.
    Ma, T., Dai, S., Song, M., et al.: Electromagnetic design of hightem-perature superconducting DC bias winding for single-phase 500 kV saturated iron-core fault current limiter. IEEE Trans. Appl. Supercond. 28(3), 5200805 (2018)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Guangdong Power GridGuangzhouChina
  2. 2.School of Electrical EngineeringBeijing Jiaotong UniversityBeijingChina

Personalised recommendations