Faculty Profiles - OGAWA Jun

MISC - OGAWA Jun

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Study on Axial Gap Type HTS Induction Motor for Aircraft Application

福井聡, 小川純

電気学会研究会資料(Web) ( MC-21-001-008/ASC-21-001-008 ) 2021

Development of induction heating device for aluminum extrusion molding using HTS magnets (3)-Overview of the heating test-

伊東徹也, 伊東徹也, 福井聡, 小川純, 河島裕, 緒方康博, 正孝幸, 杉本志郎, 古瀬充穂, 渡部智則, 長屋重夫, 森下勇樹, 長岡孝, 府山伸行, 縄稚典生

低温工学・超電導学会講演概要集 102nd (CD-ROM) 2021

Influence of trapped magnetic field in HTS bulk on direction of multi-pulse magnetic field

2020 ( 2 ) 15 - 17 2020.10

Flux Jump and Its Behavior in Pulsed-Field Magnetizing Process for Mg-B Bulk Magnet

岡徹雄, 沖隼光, 山中健悟, 須藤正照, DADIEL Longji, DORGE Remi, HAESSLER Wolfgang, SCHEITER Juliane, 小川純, 福井聡, BERGER Kevin, BADICA Peter, NOUDEM Jacques, 坂井直道, MILYALA Muralidhar, 村上雅人, 横山和哉

低温工学・超電導学会講演概要集 99th 2020

パルス着磁したMg-Bバルク超伝導体からの磁場散逸現象

岡徹雄, 横山和哉, 沖隼光, 山中健悟, 小川純, 福井聡, SCHEITER Juliane, HAESSLER Wolfgang, DADIEL Longji, 坂井直道, MILYALA Muralidhar, 村上雅人, NOUDEM Jacques

低温工学・超電導学会講演概要集 98th 2019

磁界の波形がRE線の磁化損失特性に及ぼす影響の検討

小川純, 近藤和人, 福井聡

低温工学・超電導学会講演概要集 98th 2019

全方向磁界を印加した条件におけるBi系線材とY系線材の磁化損失のモデル化

小川純, 福井聡, 岡徹雄, YAN Panpan, 金森光紀

低温工学・超電導学会講演概要集 96th 104 2018.5

高温超伝導バルク磁石への逆磁場を用いた複数回パルス着磁

岡徹雄, 武田晃, 清水紅旭, 小川純, 福井聡, 佐藤孝雄, 横山和哉, 村上雅人

低温工学・超電導学会講演概要集 96th 93 2018.5

バルク超伝導ホウ化マグネシウムのパルス着磁における磁束散逸現象

岡徹雄, 武田晃, 沖隼光, 小川純, 福井聡, 佐藤孝雄, HAESSLER Wolfgang, 横山和哉

電気学会全国大会講演論文集(CD-ROM) 2018 ROMBUNNO.5‐166 2018.3

A review article: Compact magnetic field generators containing HTS bulk magnets cooled by refrigerators and their feasible applications

Tetsuo Oka, Jun Ogawa, Satoshi Fukui, Takao Sato, Tomohito Nakano, Kazuya Yokoyama, Takashi Nakamura, Hiroyuki Fujishiro, Koshichi Noto

High-Temperature Superconductors: Occurrence, Synthesis and Applications 291 - 306 2018.1

© 2018 Nova Science Publishers, Inc. Various types of strong magnetic field generators with use of HTS bulk magnets and the small-scale refrigerators have been actually proposed and experimentally estimated for the feasible applications. The most characteristic feature of bulk magnets is regarded as compact and strong field generators with respect to their magnetic field spaces or their machine structures of themselves. Among them, the magnetic flux density of the face-toface magnetic poles reached 3.2 T and 4.4 T when they were activated by the pulsed field magnetization and the field cooling method, respectively. Furthermore, a very small bulk magnet generating 2.8 T and the system featured by the wide magnetic poles containing seven magnets have been constructed with use of ST pulse tube coolers in order to expand the feasible application areas. On the other hand, although the bulk magnets are characterized by their steep field distributions, we attempted to gain the uniform magnetic field space, and successfully achieved the uniformity of 385 ppm in 4 mm range by combining the deformed magnetic field profiles which generated between the face-to-face magnetic poles. The performances of these unique systems have exceeded those of the conventional electromagnet or any permanent magnets by far, demonstrating the superiority to other strong magnetic field generators.

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内層の電磁条件の違いによる二層高温超伝導ケーブルの交流損失特性

小川純, 福井聡, 岡徹雄, 小川智也, 菅井護

低温工学・超電導学会講演概要集 95th 164 2017.11

Magnetic Separation Using HTS Bulk Magnet for Cs-Bearing Fe precipitates

T. Oka, K. Ichiju, S. Sasaki, J. Ogawa, S. Fukui, T. Sato, M. Ooizumi, K. Yokoyama, S. Aoki, N. Ohnishi

Journal of Physics: Conference Series 897 2017.9

© Published under licence by IOP Publishing Ltd. A peculiar magnetic separation technique has been examined in order to remove the Cs-bearing Fe precipitates formed of the waste ash from the withdrawn incinerator furnaces in Fukushima. The separation system was constructed in combination with high temperature superconducting bulk magnets which generates the intensive magnetic field over 2 T, which was activated by the pulsed field magnetization process. The separation experiment has been operated with use of the newly-built alternating channel type magnetic separating device, which followed the high-gradient magnetic separation technique. The magnetic stainless steel filters installed in the water channels are magnetized by the applied magnetic fields, and are capable of attracting the precipitates bearing the Fe compound and thin Cs contamination. The experimental results clearly exhibited the positive feasibility of HTS bulk magnets.

DOI： 10.1088/1742-6596/897/1/012024

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HTSバルク磁石を用いたNiメッキ廃液からのNi化合物の磁気分離によるリサイクル技術

岡徹雄, 佐々木翔, 小川純, 福井聡, 佐藤孝雄, 大泉学, 辻村盛夫, 横山和哉

低温工学・超電導学会講演概要集 94th 159 2017.5

通電波形が交流通電損失特性に及ぼす影響についての実験的評価

小川純, 杵淵修造, 青山峻, 福井聡, 岡徹雄

低温工学・超電導学会講演概要集 94th 63 2017.5

バルク超伝導体の複数回パルス着磁における逆磁場印加での磁場捕捉挙動

岡徹雄, 原健介, 武田晃, 小川純, 福井聡, 佐藤孝雄, 横山和哉

電気学会全国大会講演論文集(CD-ROM) 2017 ROMBUNNO.5‐124 2017.3

Development of Test Device for Aluminum Metal Melting by Electromagnetic Induction Heating Using HTS Coils

2017 ( 1 ) 59 - 63 2017.1

セシウムを含む鉄化合物沈殿の高温超電導バルク磁石を使った磁気分離

岡徹雄, 一重佳那, 佐々木翔, 小川純, 福井聡, 佐藤孝雄, 大泉学, 横山和哉, 青木茂幸, 大西徳幸

日本磁気科学会年会プログラム・要旨集 11th 44‐45 2016.11

AC Loss Reduction in HTS Coil with Iron Core Using Flux Modulation by Ferromagnetic Material

2016 ( 13 ) 19 - 22 2016.6

Magnetic Separation for Recovering Ni Compounds from Plating Waste with Use of HTS Bulk Magnets

T. Oka, Y. Takayanagi, S. Machida, K. Ichiju, S. Fukui, J. Ogawa, T. Sato, M. Ooizumi, M. Tsujimura, K. Yokoyama

IEEE Transactions on Applied Superconductivity 26 ( 4 ) 2016.6

Language：English Publisher：Institute of Electrical and Electronics Engineers Inc.

A characteristic magnetic separation technique has been developed to recycle the Ni resource from the waste fluid of electroless Ni-plating processes. Since the plating waste still contains high concentration of Ni ions after several cycles of plating processes, the magnetic separation experiments were conducted to collect the precipitates containing Ni compounds. After extracting the fine NiHPO3 precipitate from the waste liquid, we synthesized the NiSO4 crystals from the NiHPO3 precipitates through the reaction with the concentrated sulfuric acid. The open-gradient magnetic separation was employed to separate the NiSO4 crystals from the mixed slurry composed of the NiSO4 and the NiHPO3 due to the difference between their magnetic properties. The experiments were practically conducted with use of the Gd123-based HTS bulk magnets with very steep gradient of magnetic field of over 100 T/m, which were activated to the magnetic fields of 1.53 and 1.95 T by the pulsed field magnetization process operated at 35 K. The ratio of NiSO4 content in the collected slurry attracted to the magnetic poles reached up to 98%, which suggests that the paramagnetic NiSO4 crystals are preferentially collected by the magnetic force from the mixed slurry in the strong magnetic field generated by the HTS bulk magnet.

DOI： 10.1109/TASC.2016.2517923

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超伝導バルク磁石を用いたセシウムの磁気分離

一重佳那, 佐々木翔, 小川純, 福井聡, 佐藤孝雄, 岡徹雄, 横山和哉, 青木茂幸

低温工学・超電導学会講演概要集 93rd 109 2016.5

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