| Title |
Fabrication, AC Loss Measurement and Analysis of Bi-2223 Conductors with Respect to Various Twist Pitch |
| Authors |
장미혜(Jang, Mi-Hye) ; 추용(Chu, Yong) ; 임준형(Lim, Jun-Hyung) ; 주진호(Joo, Jin-Ho) ; 고태국(Ko, Tae-Kuk) |
| Keywords |
Bi-2223 multi-filaments ; AC losses ; TWist pitch ; Self-field hysteresis ; Eddy current loss ; Coupling current loss |
| Abstract |
In this papre, AC losses of Bi-2223 tapes with different twist pitch of superconducting core were fabricated, measured and analyzed. These samples produced by a powder-in-tube method are multi-filamentary tape with Ag matrix. Also, it's produced by non-twist and different twist pitch(8, 10, 13, 30, 50, 70 mn). The critical current measurement was carried out under the environment in Liquid nitrogen and in zero field by 4-probe method. And the AC loss measurement was carried out under the environment of applied time-varying transport current by transport method. From experiment, the critical current is larger non-twist than twisted filament. And, the AC loss by Norris equation is higher non-twisted tape than 13mm twisted tape. Also, it is confirmed that of AC loss of tape having non-twist pitch larger than those having differnet twist pitch. |