Waveform control pulsed magnetization of GdBaCuO bulk using negative control feedback at 60 K

カテゴリ: 研究会(論文単位)

論文No: ASC20007

グループ名: 【B】電力・エネルギー部門 超電導機器研究会

発行日: 2020/10/29

タイトル(英語): Waveform control pulsed magnetization of GdBaCuO bulk using negative control feedback at 60 K

著者名: コーヌ アントン(東京海洋?学),井田 徹哉(東京海洋大学),綿崎 将大(東京海洋大学),和泉 充(東京海洋大学)

著者名(英語): Antomne Caunes(Tokyo University of Marine Sciences and Technology),Tetsuya Ida(Tokyo University of Marine Science and Technology),Masahiro Watasaki(Tokyo University of Marine Science and Technology),Mitsuru Izumi(Tokyo University of Marine Science and Technology)

キーワード: High temperature superconductor|Pulsed magnetization|Flux jump|Waveform control|Negative feedback|Melt growth

要約(日本語): 本研究では波形制御パルス着磁がHTSバルクの磁場捕捉へ与える影響を明らかにする。アキシャルギャップ型HTSモーターの構造に似せて2つの渦巻き型コイルの間に置いたo45 x 19 mmのGdBCOバルクをGM冷凍機で60 Kまで冷却してパルス着磁を試みた。バルクの表面に置いたホール素子から得た侵入磁束密度を元にパルス着磁の負帰還制御を試みたところ、一度のパルス着磁によって2Tを超える捕捉磁束密度が得られた。

要約(英語): The purpose of this study is to analyze the effect of the negative feedback waveform control pulsed field magnetization on the trapped magnetic field in a GdBaCuO bulk sample. A high tapped magnetic flux density using a single pulse magnetization would be of great interest for practical use in bulk HTS machines. Currently, magnetization of the superconducting poles of bulk HTS machines using field cooling, or zero-field cooling methods, which often require the disassembly of the machine, as well as few hours to perform the magnetization. With practical use of in mind, the experiment has been done using a reproduction of the internal architecture of an axial-type HTS motor designed for an electric pod propulsion system. The HTS bulk sample, of diameter 45 mm and thickness 19 mm, is therefore placed between two vortex type coils. It is cooled down to 60K by a GM cryocooler. The negative feedback uses a dedicated Hall sensor placed on the center of bulk. Flux jumps have been observed in the bulk when using this technique, along with temperature rises. A magnetic flux density of more than 2T has been trapped in the center at 60K using a single pulse.

原稿種別: 英語

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