Junnosuke Nakatsugawa
Waseda University
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Publication
Featured researches published by Junnosuke Nakatsugawa.
IEEE Transactions on Applied Superconductivity | 1999
Junnosuke Nakatsugawa; S. Noguchi; Atsushi Ishiyama; Hiroyuki Kado; Michiharu Ichikawa
The superconducting fault current limiter (SCFCL) is expected to be the first application of high-T/sub C/ superconductors (HTSs) in power systems. To develop a magnetic shielding type superconducting fault current limiter, we have carried out some fundamental experiments concerning the magnetic shielding characteristics of an HTS bulk cylinder. In this paper, the experimental results of magnetic flux penetration into a Bi(2223) cylinder are shown. AC magnetic field is applied to the sample by a primary winding (copper coil) excited by AC triangular- and sinusoidal-waveform currents in the frequency range of 0.1 Hz to 100 Hz. We also developed a finite element method (FEM) computer program for evaluation of the dynamic electromagnetic behavior of the HTS cylinder in a time-varying external magnetic field. The results of computer simulations considering the voltage-current (E-J) characteristic are compared with experiments.
Electrical Engineering in Japan | 2001
Atsushi Ishiyama; Junnosuke Nakatsugawa; So Noguchi; Hiroyuki Kado; Michiharu Ichikawa
The superconducting fault current limiter is expected to be the first application of high-Tc superconductors (HTSs) in power systems. To develop a magnetic shielding-type superconductor fault current limiter, we have carried out some fundamental experiments on the magnetic shielding characteristics of an HTS bulk cylinder. In this paper, the experimental results of magnetic flux penetration into Bi-2223 cylinders are shown. An ac magnetic field is applied to the sample by a primary winding (copper coil) excited by ac triangular- and sinusoidal-waveform currents in the frequency range from 0.1 Hz to 100 Hz. We also developed a finite element method computer program for evaluation of the dynamic electromagnetic behavior of the HTS cylinder in a time-varying external magnetic field. The results of computer simulations considering the voltage–current (E–J) characteristic are compared with experiments. Next we carried out a current-limiting test with a small limiter model, and the developed finite element method computer program successfully simulated the electromagnetic behavior in current-limiting operation.
Archive | 2003
Junnosuke Nakatsugawa; Hitoshi Ohura; Tsuyoshi Tanaka; Tunehiro Endo; Yukio Kawabata
Archive | 2011
Kazuaki Tobari; Yoshitaka Iwaji; Junnosuke Nakatsugawa; Rikio Yoshikawa; Masamichi Yagai
Archive | 2010
Junnosuke Nakatsugawa; Yoshitaka Iwaji; Norihisa Iwasaki; Hirokazu Nagura
Archive | 2006
Yoshitaka Iwaji; Junnosuke Nakatsugawa; Kazuaki Tobari; 潤之介 中津川; 善尚 岩路; 和明 戸張
Archive | 2012
Hiroshi Morita; 裕 森田; Hironori Matsumoto; 啓紀 松本; Junnosuke Nakatsugawa; 中津川 潤之介; Atsushi Otake; 大嶽 敦; Satoshi Kikuchi; 菊地 聡
Archive | 2006
Yoshitaka Iwaji; Yasuhiko Konoue; Minoru Kurosawa; Junnosuke Nakatsugawa; 潤之介 中津川; 善尚 岩路; 康彦 鴻上; 稔 黒澤
Archive | 2004
Tsunehiro Endo; Junnosuke Nakatsugawa; Kenji Sakurai; Takashi Tanaka; 潤之介 中津川; 健司 桜井; 荘 田中; 常博 遠藤
Ieej Transactions on Power and Energy | 1999
Atsushi Ishiyama; Junnosuke Nakatsugawa; So Noguchi; Hiroyuki Kado; Michiharu Ichikawa
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