研究者詳細 - 大塚　信也

論文 - 大塚　信也

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Fast Quench of Superconducting Wire by Pulsed Current and its Application to Pulsed Power Generator 査読有り

J.Suehiro,K.Tsutsumi,D.Tsuji,S.Ohtsuka,K.Imasaka,M.Hara

Proc. of the 11th International Symposium on High-voltage Engineering 5 390 - 393 1999年04月

Frequency Spectrum Characteristics of PD Electromagnetic Waves in GIS Measured by UHF Sensors 査読有り

S.Ohtsuka,K.Takenaka,M.Hikita

Proc. of 1999 Japan - Korea Joint Symposium on Electrical Discharge and High Voltage Engineering 269 - 272 1999年04月

Measurements and Location Identification of Partial Discharge in Dry-type Metalized Polypropylene Film Capacitor 査読有り

Y.Makino,S.Ohtsuka,Z.H.Tian,T.Hirota,M.Hikita

Proc. of 1999 Japan - Korea Joint Symposium on Electrical Discharge and High Voltage Engineering 265 - 268 1999年04月

2組のNbTi機械式PCSから成る並列PCS回路のクエンチ特性査読有り

未入力

電気学会論文誌 119-B ( 3 ) 394 - 400 1999年03月

NbTi機械式PCS開放時のアーク放電特性とアークが超伝導接点接続に及ぼす影響査読有り

大塚信也,大坪秀一,中村貴史,辻大輔,末廣純也,原雅則

電気学会論文誌B 118 ( 12 ) 1398 - 1405 1998年12月

Magnetic Field Dependence of Transition Current of NbTi Mechanical PCS 査読有り

S.Ohtsuka,T.Nakamura,D.Tsuji,J.Suehiro,M.Hara

Cryogenics 38 ( 12 ) 1207 - 1212 1998年12月

Characteristics of NbTi Mechanical Persistent Current Switch and Mechanism of Superconducting Connection at Contact 査読有り

S.Ohtsuka,H.Ohtsubo,T.Nakamura,J.Suehiro,M.Hara

Cryogenics 38 ( 9 ) 893 - 902 1998年09月

Characteristics of NbTi mechanical persistent current switch and mechanism of superconducting connection at contact 査読有り

Ohtsuka S., Ohtsubo H., Nakamura T., Suehiro J., Hara M.

Cryogenics 38 ( 9 ) 893 - 902 1998年09月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

A Persistent Current Switch (PCS) in a SMES system requires not only low ON resistance but also high OFF resistance in order to efficiently perform a load-leveling operation. Because a mechanical switch has the advantage of infinite OFF resistance, it can operate without generating Joule losses during the coil excitation and energy transfer process. However, it will cause an energy storage loss as long as the ON resistance, which mainly depends on contact resistance, is not decreased to zero. In this study, firstly case studies on energy losses due to the ON resistance of a mechanical switch and OFF resistance of a superconducting switch are carried out so as to show the necessity of a mechanical switch as a PCS in a large-scale SMES system. Secondly the contact resistance characteristics of a mechanical switch with NbTi bulk contact pieces are experimentally investigated as a function of switch driving force, switch pressing force, and ON-OFF operation number. Additionally, the effects of contact piece shape and its surface roughness on the contact resistance are examined. It was found that a superconducting connection at contact can be realized even if the switch is repeatedly opened and closed many times. The developed mechanical PCS, which has zero contact resistance, supports a superconducting current flow of more than 200 A. The formation mechanism of the superconducting connection at contact is modeled and analyzed based on theoretical considerations. © 1998 Cryogenic Association of Japan. Published by Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0011-2275(98)00079-4

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0032158054&origin=inward

Effect of Quench Time Lag on the Succeeding Quench in the Parallel Mechanical PCS Circuit 査読有り

S.Ohtsuka,D.Tsuji,K.Tsutsumi,J.Suehiro,M.Hara

Advances in Superconductivity XI Proc. of the 11th International Symposium on Superconductivity 2 1419 - 1422 1998年04月

NbTiを用いた機械式スイッチ接点の超伝導化と超伝導接点接続形成機構の検討査読有り

大塚信也,大坪秀一,中村貴史,末廣純也,原雅則

低温工学 32 ( 10 ) 473 - 484 1997年10月

Feasibility Study on a Mechanical Persistent Current Switch in SMES 査読有り

S.Ohtsuka,H.Ohtsubo,T.Nakamura,D.Tsuji,J.Suehiro,M.Hara

Proc. of the International Conference on Electrical Engineering 102 - 105 1997年04月

Arc Discharge Characteristics Generated by Opening a NbTi Mechanical PCS 査読有り

S.Ohtsuka,T.Nakamura,D.Tsuji,J.Suehiro,M.Hara

Proc. of 1997 Japan Korea Joint Symposium on Electrical Discharge and High Voltage Engineering 141 - 144 1997年04月

Quench Current Characteristics of Parallel Mechanical PCSs 査読有り

S.Ohtsuka,T.Nakamura,D.Tsuji,J.Suehiro,M.Hara

Proc. of 15th International Conference on Magnet Technology 1 551 - 554 1997年04月

Contact Resistance Characteristics of Mechanical Switch Made of NbTi 査読有り

S.Ohtsuka,H.Ohtsubo,T.Nakamura,J.Suehiro,M.Hara

Proc. of the 8th Asian Conference on Electrical Discharge No.711 - No.711 1996年04月

Characteristics of Contact Resistance between NbTi Electrodes 査読有り

S.Ohtsuka,H.Ohtsubo,T.Nakamura,J.Suehiro,M.Hara

Advances in Superconductivity IX Proc. of the 9th International Symposium on Superconductivity 2 1441 - 1444 1996年04月

Simulation Test and Theoretical Analysis of Surge Propagation in Superconducting Magnet 査読有り

B.J.Choi,S.Ohtsuka,J.Suehiro,M.Hara

Cryogenics 35 ( 8 ) 505 - 513 1995年08月

Effects of Coil Resistance on Surge Propagation Characteristics in a Superconducting Magnet 査読有り

B.J.Choi,S.Ohtsuka,J.Suehiro,M.Hara

Proc. of 9th International Symposium on High Voltage Engineering No.7878 - No.7878 1995年04月

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