Development and Test Results of Magnetically Controlled Persistent Current Switches

Autor:	C. Takahashi, Goto Kenji, Michiaki Matsukawa, Koshichi Noto, Sadakata Nobuyuki, Osamu Kohno, Saito Takashi, H. Kimura, Honma Hitoshi, S. Fujinuma, T. Segawa, T. Takahashi
Rok vydání:	1996
Předmět:	Materials science Bobbin business.industry Composite number General Engineering Persistent current Superconducting magnetic energy storage Superconducting magnet Core (optical fiber) Magnet Forensic engineering Optoelectronics business Energy (signal processing)
Zdroj:	Materials Transactions, JIM. 37:907-911
ISSN:	2432-471X 0916-1821
DOI:	10.2320/matertrans1989.37.907
Popis:	We have developed 50A, 50A-high resistance, 200A, and 1kA class fast response magnetically controlled persistent current switches (magnetic PCS), which are thought to be necessary for small-to medium scale superconductive magnetic energy storage(SMES) systems. In this paper, we report test results on the 200A class magnetic PCS. A 6.6m long cable made from 6 strands of 55 core, in-situ processed CuNb composite wire (0.3mm?, B c2 ∼0.6T, J c ∼136A at 4.2K and OT) with high resistivity CuNi alloy matrix was non-inductively wound on a FRP bobbin and set into a control magnet which can be swept up to the maximum 1.2T within 2sec. The magnetic PCS was combined with a small superconducting magnet (-SOmH, 200A, 2.72T) and realized a persistent current mode at 200A. The fast response was checked with a combination of an outer resistance load and by a switching-off of the magnetic PCS in a persistent current mode. The switching lime of the magnetic PCS was shorter than 0.16sec. The recent results of an energy retaining test for 10 hours by a 1kA class magnetic PCS at 1kA will be also reported briefly.
Databáze:	OpenAIRE
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