Title :
Flux flow resistance in Bi2223 generated by pulse currents
Author :
Mutsuura, Keita ; Shimizu, Hirotaka ; Yokomizu, Yasunobu ; Matsumura, Toshiro
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Nagoya Univ., Japan
fDate :
6/1/2005 12:00:00 AM
Abstract :
We have proposed a current limiting element using the flux flow resistance in a high temperature superconductor (HTS) for a pulse over-current such as a magnetizing inrush current in a transformer. We experimentally investigated the generation process of flux flow resistance in a Bi2223 bulk with an inrush current. The voltage-current density characteristics and their dependence on the joule heat generated in the Bi2223 bulk were measured. Comparing the results with the characteristics for the ac over-current, we made it clear that the both have almost the same characteristics.
Keywords :
bismuth compounds; calcium compounds; fault current limiters; flux flow; high-temperature superconductors; lead compounds; overcurrent protection; strontium compounds; superconducting devices; Bi2PbSr2Ca2Cu3O10; flux flow resistance; high temperature superconductor; inrush current; joule heat; pulse currents; pulse over-current; transformer; voltage-current density characteristics; Character generation; Current limiters; Density measurement; Electrical resistance measurement; High temperature superconductors; Magnetic flux; Pulse generation; Pulse transformers; Superconducting magnets; Surges; Bi2223 bulk; flux flow resistance; inrush current; voltage-current density characteristics;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849437
