TY - JOUR
T1 - The design to downsize a conduction-cooled LTS pulse coil for UPS-SMES as protection from momentary voltage drops
AU - Kawagoe, Akifumi
AU - Tsukuda, Shinji
AU - Sumiyoshi, Fumio
AU - Mito, Toshiyuki
AU - Chikaraishi, Hirotaka
AU - Hemmi, Tsutomu
AU - Baba, Tomosumi
AU - Yokota, Mitsuhiro
AU - Morita, Yoshitaka
AU - Ogawa, Hideki
AU - Abe, Ryo
AU - Nakamura, Akira
AU - Okumura, Kagao
AU - Kuge, Atsuko
AU - Iwakuma, Masataka
N1 - Funding Information:
Manuscript received August 29, 2006. This work was supported in part by NIFS (NIFS05ULAA102), the grant of NEDO and the grant-in aid for Scientific Research (#16206028). A. Kawagoe, S. Tsukuda, and F. Sumiyoshi are with Kagoshima University, 1-21-40 Kagoshima, 890-0065, Japan (e-mail: kawagoe@eee.kagoshima-u.ac. jp). T. Mito, H. Chikaraishi, T. Hemmi, T. Baba, M. Yokota, Y. Morita, and H. Ogawa are with the National Institute for Fusion Science, 322-6, Oroshi-cho, Toki, Gifu, 509-5292, Japan. R. Abe and A. Nakamura are with the Shibuya Kogyo Co., Ltd., Mameda-honmachi, Kanazawa, 920-8681, Japan. K. Okumura is with the Technova Inc., 13th Fl. Imperial Tower., 1-1,Uchi-saiwai-cho 1-chome, Chiyoda-ku, Tokyo 100-0011, Japan. M. Iwakuma is with Kyusyu University, 601901 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan. Digital Object Identifier 10.1109/TASC.2007.898394
PY - 2007/6
Y1 - 2007/6
N2 - The stability margin of a conduction-cooled LTS pulse coil with stored energy of 1 MJ, which is used for UPS-SMES as protection from momentary voltage drops, is estimated from thermal analyses using the two-dimensional finite elementary method. How much the 1 MJ coil is able to be downsized is discussed. The winding conductor of this coil is a NbTi/Cu Rutherford cable, which is extruded with aluminum. Dyneema FRP and Litz wires are used as the spacers of this coil. In the design of this 1 MJ coil, the effects of spacers were neglected. In order to estimate the stability margin, thermal analyses was carried out by taking into account the thermal effects of spacers, for the coil during overload operation. And it was checked whether the maximum temperature The results showed that the 1 MJ coil has a large stability margin of 8 times the rated ac loss. In addition, new coils with a stability margin of about two times were designed. Possibilities for reducing the size and the cost of a 1 MJ LTS pulse coil are also shown.
AB - The stability margin of a conduction-cooled LTS pulse coil with stored energy of 1 MJ, which is used for UPS-SMES as protection from momentary voltage drops, is estimated from thermal analyses using the two-dimensional finite elementary method. How much the 1 MJ coil is able to be downsized is discussed. The winding conductor of this coil is a NbTi/Cu Rutherford cable, which is extruded with aluminum. Dyneema FRP and Litz wires are used as the spacers of this coil. In the design of this 1 MJ coil, the effects of spacers were neglected. In order to estimate the stability margin, thermal analyses was carried out by taking into account the thermal effects of spacers, for the coil during overload operation. And it was checked whether the maximum temperature The results showed that the 1 MJ coil has a large stability margin of 8 times the rated ac loss. In addition, new coils with a stability margin of about two times were designed. Possibilities for reducing the size and the cost of a 1 MJ LTS pulse coil are also shown.
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U2 - 10.1109/TASC.2007.898394
DO - 10.1109/TASC.2007.898394
M3 - Article
AN - SCOPUS:34547445562
SN - 1051-8223
VL - 17
SP - 1963
EP - 1966
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2
ER -