研究者詳細 - 金　錫範

MISC - 金　錫範

分割表示 288 件中 201 - 220 件目／全件表示 >>

キャンセル型有効電力法による超電導コイル保護システムの開発

竹内和哉, 積山泰和, 七戸希, 金錫範, 村瀬暁

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 75 253 - 253 2006年11月

三次元超電導アクチュエータの動作特性におけるHTSバルク体と電磁石の形状依存性

井上卓哉, 金錫範, 清水昭宏, 村瀬暁

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 75 160 - 160 2006年11月

磁気クロマトグラフィー法による微細粒子分離現象に関する検討(その1)

中田千秋, 金錫範, 村瀬暁, 岡田秀彦

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 75 268 - 268 2006年11月

Nb_3Sn複合超電導線における事前曲げ効果の歪解析

岡田一星, 村瀬暁, 金錫範, 七戸希, 淡路智, 小黒英俊, 西島元, 渡辺和雄, 和気正芳

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 75 266 - 266 2006年11月

The electromagnet design for 3-D superconducting actuator using HTS bulk

S. B. Kim, T. Inoue, A. Shimizu, S. Murase

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 445 1119 - 1122 2006年10月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

We have been developing a three-dimensional (3-D) superconducting actuator consists of a field-cooled HTS bulk for mover and two-dimensional arranged multiple electromagnets as a stator. The HTS bulk is magnetically connected with electromagnets and it can be moved in 3-D directions and rotates without upper side electromagnets and spatial restrictions. The current and the polarity of each electromagnet were individually controlled by the switching power supply. In this paper, we experimentally investigated the effects of the shapes of HTS bulks (disk shape with/without inner hole) and electromagnets (4 and 8 polarities) in points of stabilities and forces of levitation. (c) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physc.2006.06.026

Web of Science

researchmap

Current density distributions of the meander type resistive fault current limiters

S. B. Kim, J. Watanabe, N. Nanato, S. Murase, O. B. Hyun

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 445 1069 - 1072 2006年10月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

We have been developing a magnetic field measurement system with two-axis hall-probes to study the critical current density distribution or magnetic properties of high-T-c superconductors. In this study, the current distributions at corners of the meander type resistive fault current limiters were measured by hall probe with high spatial resolution. The both of axial and radial magnetic field components (B-x and B-z) according to the direct (DC) and alternating (AC) transport currents were measured by hall probe to estimate the current density distribution with high accuracy. And, it is confirmed that the measured radial components are very useful to estimate the current distribution. (c) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physc.2006.06.027

Web of Science

researchmap

Simple measurement of the AC transport current loss for HTS conductors using an active power detection method

N. Nanato, T. Ohzawa, S. Murase, S. B. Kim

CRYOGENICS 46 ( 9 ) 672 - 675 2006年9月

記述言語：英語出版者・発行元：ELSEVIER SCI LTD

Reducing AC loss in a superconducting apparatus is one of the most important issues, and the precise measurement and estimation of AC losses are essential to reduce them. The four-terminal method is universally used as an electric measurement method of AC losses for superconducting tapes and wires. In this method, noise and inductive voltage superposed on the terminal voltage of the superconductor are eliminated by a lock-in amplifier and cancel coil, respectively, and then measurement of very small resistive voltage is achieved. However, using this conventional method, a plurality of measuring instruments and apparatuses are needed, and therefore the measuring system becomes complicated and much time is consumed in the calibration process. In this paper, we present a simple and precise measurement system based on an active power detection method, which is proposed as a quench detection method. The proposed system consists of a small number of instruments and apparatus and is less susceptible to noise. Its usefulness is verified by comparing the proposed method and the conventional four-terminal method in measuring the AC transport current loss of a Bi2223/Ag tape. (C) 2006 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.cryogenics.2006.04.001

Web of Science

researchmap

Nb_3Sn超電導線の銅安定化材の残留抵抗比に及ぼす熱履歴の影響

村瀬暁, 木山和幸, 岡田一星, 七戸希, 金錫範

電気学会研究会資料. ASC, 超電導応用電力機器 2006 ( 16 ) 1 - 4 2006年6月

Characteristics measurements of HTS tape with parallel HTS tapes

Jin-Hong Joo, Seog-Whan Kim, Kyu Jeong Song, Chan Park, Rock-Kil Ko, Ho-Sup Kim, Jung-Pyo Hong, SeokBeom Kim

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 16 ( 2 ) 119 - 122 2006年6月

記述言語：英語出版者・発行元：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Many high temperature superconducting (HTS) tape manufactures make an effort to reduce the transport current loss of HTS tapes. The knowledge of critical current and self-field in an HTS tape is very useful to compute the transport current losses. The spatial distribution and magnitude of self-field are variable due to the neighboring materials. In this paper, the critical currents and the transport current losses of BSCCO and YBCO tapes with paralleled magnetic material (Ni tape) and/or diamagnetic material (BSCCO tape) are experimentally investigated to improve the AC loss properties. The critical currents of HTS tapes with paralleled Ni tape are slightly decreased and the transport current losses are markedly increased. However, the critical currents and transport current losses of HTS tapes with paralleled BSCCO tape have not current carrying are more improved than single HTS tape.

DOI： 10.1109/TASC.2005.869674

Web of Science

researchmap

Self-field loss in AC transport current of Ni-sheathed MgB2 superconducting tapes

Satoru Murase, Toshiaki Ohzawa, Takashi Harada, Nozomu Nanato, Seok Beom Kim, Yutaka Yamada, Kyoji Tachikawa

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 16 ( 2 ) 1403 - 1406 2006年6月

記述言語：英語出版者・発行元：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

AC transport current loss (self field loss) of ex-situ-processed MgB2 superconducting tapes with Ni sheath was measured under different conditions of transport current value, transport current frequency, and temperature. Experimental results were compared with Norris' theoretical curves and previous measured losses of MgB2 tapes with CuNi and stainless-steel sheaths, which were larger than the theoretical ones and previous data. The loss vs. normalized transport current (transport current normalized by critical current) curves varied with temperature and the loss at 9 K was larger than that at 14 K. The measured loss approached Norris' curves in the high normalized transport current region. In order to gain insight into these origins, FEM analysis of magnetic flux concentration by Ni and estimations of hysteresis loss of ferromagnetic nickel-sheath and of homogeneity of the core were carried out. As a result, the hysteresis loss of Ni was very small based on the estimation and the loss, measurement of Ni. Main contributions to large loss are considered to be self-field enhancement due to magnetic flux concentration by the Ni-sheath and critical current density distribution of the MgB2 core caused by the inhomogeneity of critical current density and critical temperature.

DOI： 10.1109/TASC.2006.870448

Web of Science

researchmap

冷凍機冷却における銅イオンプレーティング外部安定化変態法Nb_3Al超電導線の熱的安定性

下山雅弘, 三橋崇志, 木山和幸, 村瀬暁, 金錫範, 七戸希, 西島元, 渡辺和雄, 菊池章弘, 竹内孝夫

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 74 228 - 228 2006年5月

磁気クロマトグラフィーによる微粒子およびイオン分離に関する数値解析

金錫範, 中田千秋, 村瀬暁, 岡田秀彦

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 74 35 - 35 2006年5月

隣接する磁性体による高温超電導線材の通電特性(その3)

原田孝, 朱眞弘, 渡邊准司, 井上卓哉, 七戸希, 村瀬暁, 金錫範

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 73 144 - 144 2005年11月

2軸方向磁場測定用ホール素子および磁場可視化システムの開発(その1)

金錫範, 渡邊准司, 七戸希, 村瀬暁, 黄啓新, 宝川幸司

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 73 142 - 142 2005年11月

2軸ホール素子による抵抗型抵抗型限流器素子の通電特性評価(その2)

渡邊准司, 七戸希, 村瀬暁, HYUN O. B., 金錫範

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 73 143 - 143 2005年11月

有限要素法によるNb_3Sn複合超電導線の事前曲げ歪効果の解析

木山和幸, 七戸希, 金錫範, 村瀬暁, 小黒英俊, 西島元, 淡路智, 渡辺和雄

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 73 45 - 45 2005年11月

第三高調波電圧誘導法に用いるコイルの形状および測定位置依存性

木島孝, 渡邊准司, 七戸希, 村瀬暁, 金錫範

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 73 92 - 92 2005年11月

Linear motion and rotation characteristics of YBCO bulk using exciting coils

S Okamura, A Shimizu, SB Kim, S Murase

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 426 834 - 838 2005年10月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

A superconducting actuator with multiple motions is proposed and experimentally investigated for the development of microelectrical machines. The disk-shaped YBCO bulk was located above the electromagnets and cooled down in the field-cooling method, which enabled the flux pinning. The YBCO bulk superconductor was driven in vertical, horizontal and/or self-rotation by PC-controlled coil currents using multiple electromagnets. The most suitable levitation stability was obtained when we used four electromagnets and NNSS trapped field type. It was confirmed that the levitation force and horizontal moving force strongly depended on the coil current and the air gap length, respectively. (c) 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physc.2005.03.069

Web of Science

researchmap

超電導アクチュエータの3次元挙動に関する研究

清水昭宏, 七戸希, 金錫範, 村瀬暁

電気学会研究会資料. ASC, 超電導応用電力機器 2005 ( 22 ) 19 - 24 2005年6月

有効電力検出法を用いた超電導コイル保護システムの開発

積山泰和, 藤原健司, 丹羽伸次郎, 七戸希, 金錫範, 村瀬暁

電気学会研究会資料. ASC, 超電導応用電力機器 2005 ( 22 ) 81 - 84 2005年6月

　前のページ - 次のページ　

<金 錫範>

MISC - 金 錫範

<金　錫範>

MISC - 金　錫範