Title :
Operation of hybrid current limiter based on high-Tc superconducting thin film
Author :
Meerovich, V. ; Sokolovsky, V. ; Goren, S. ; Kozyrev, A.B. ; Osadchy, V.N. ; Hollmann, E.K.
Author_Institution :
Dept. of Phys., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
Abstract :
A high-Tc superconducting (HTSC) thin film with an inductive shunt was investigated as the model of a hybrid current limiter based on the superconducting-normal state transition. In addition to features previously observed in operation of other current limiters, sharp peaks of rather high frequency were found to appear on the background of a basic low-frequency voltage signal. This is attributed to self-oscillations of temperature and current in the superconductor. The influence of the frequency and magnitude of the circuit current on the character of self-oscillations was experimentally investigated. Qualitative analysis of the conditions for appearance of the self-oscillations under dc and ac conditions was carried out.
Keywords :
barium compounds; circuit oscillations; current limiters; high-temperature superconductors; superconducting device testing; superconducting switches; superconducting thin films; yttrium compounds; AC conditions; DC conditions; HTSC thin film; YBaCuO; YBaCuO film; current oscillations; fault current limiter; high frequency peaks; hybrid current limiter; inductive shunt; low-frequency voltage signal; self-oscillations; superconducting-normal state transition; switching application; temperature oscillations; Circuits; Current limiters; Frequency; High temperature superconductors; Superconducting films; Superconducting materials; Superconducting microwave devices; Superconducting thin films; Switches; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
