학술논문
AC Loss of MgB2 Superconducting Coils With Alternating Transport Current in Rotating Magnetic Field
Document Type
Periodical
Author
Source
IEEE Transactions on Applied Superconductivity IEEE Trans. Appl. Supercond. Applied Superconductivity, IEEE Transactions on. 33(5):1-5 Aug, 2023
Subject
Language
ISSN
1051-8223
1558-2515
2378-7074
1558-2515
2378-7074
Abstract
In this paper, the authors measured AC losses of an MgB 2 superconducting (SC) coil being applied to rotating magnetic field and induced alternating current at 20 K. While applying rotating magnetic field to the MgB 2 SC coil using Halbach array permanent magnet rotor, 0.2-ohm load is connected to the MgB 2 SC coil to induce transport current in the measurement system. The AC loss of the MgB 2 SC coil, ohmic loss at the load are measured and estimated by torque meter and current probe, respectively. Also, theoretical estimation via FEM analysis is conducted. The results showed that the measured and calculated AC losses at 80 Hz are7.23 W/cm 3 and 7.17 W/cm 3 , respectively. And measurement and analysis loss results are well agreed among 40–80 Hz.