DocumentCode
974069
Title
HTS Magnet for Maglev Applications (2)–Magnet Structure and Performance
Author
Nemoto, Kaoru ; Terai, Motoaki ; Igarashi, Motohiro ; Okutomi, Takeshi ; Hirano, Satoshi ; Kuwano, Katsuyuki ; Kusada, Shigehisa ; Yamashita, Tomohisa ; Yanase, Yasuto ; Kuriyama, Toru ; Tosaka, Taizo ; Tasaki, Kenji ; Marukawa, Kotaro ; Hanai, Satoshi ;
Author_Institution
Central Japan Railway Co., Tokyo
Volume
16
Issue
2
fYear
2006
fDate
6/1/2006 12:00:00 AM
Firstpage
1104
Lastpage
1107
Abstract
An HTS magnet for maglev application has been developed. The magnet consists of four persistent-current HTS coils, and is operated at a rated temperature of 20 K and a rated magnetomotive force of 750 kA for each coil. This paper describes the structure and performance test results of the HTS magnet. The four HTS coils are installed in a cryostat and conductively cooled by two sets of two-stage GM type pulse tube cryocoolers below 20 K. Detachable current leads, which are composed of connectors and ultrasonic motors, are adopted to reduce the heat leakage to the 1st stage cold head of the cryocoolers. The HTS coils are simultaneously charged up to the rated magnetomotive force. Persistent current operating tests were carried out and the current decay rates of 0.4-0.7%/day were attained. Also, in order to evaluate the mechanical capability of the magnet, vibration tests were conducted and permissible vibration responses were obtained
Keywords
cryostats; dynamic testing; electric connectors; high-temperature superconductors; magnetic levitation; persistent currents; superconducting coils; superconducting magnets; ultrasonic motors; 20 K; HTS magnet; connectors; cryostat; current leads; heat leakage; maglev applications; magnetomotive force; persistent current operating tests; persistent-current HTS coils; two-stage GM type pulse tube cryocoolers; ultrasonic motors; vibration tests; High temperature superconductors; Magnetic levitation; Persistent currents; Superconducting coils; Superconducting magnets; Synchronous motors; Testing; Vehicles; Vibrations; Wires; Bi2223; current lead; maglev; superconducting magnet; vibrations;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2006.871281
Filename
1643042
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