Waveform control pulsed magnetization of GdBaCuO bulk using negative feedback at 60 K
Waveform control pulsed magnetization of GdBaCuO bulk using negative feedback at 60 K
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在 60 K 下使用负反馈波形控制 GdBaCuO 块体的脉冲磁化
DOI：
10.1109/tasc.2021.3064545
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Mitsuru Izumi and Tetsuya Ida
中科院分区：
文献类型：
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作者：
Antomne A. Caunes;Masahiro Watasaki;Mitsuru Izumi and Tetsuya Ida
高温超导体旋转电机的实际使用受到限制，尽管它们的功率密度比永磁电机高，但受到体的磁化过程的限制。为了促进超导电机的实际应用，需要一种快速有效的磁化工艺。这就是为什么我们开发了一种方法，用于磁化大块超导体和捕获高磁通量密度使用单一脉冲场磁化（PFM）。通过控制外加磁场对超导磁体进行磁化的方法已经在77 K和70 K下进行了试验。在这项研究中，我们试图在60 K的GdBaCuO块体中捕获高磁通密度，以确认该方法在较低温度下是有效的。此外，我们尝试改进的方法，利用负反馈的磁通密度的增长部门，以控制斩波的电流流过磁化线圈。与被动PFM相比，我们设法将脉冲期间的温升降低了10 K，并在体样品的中心捕获了最大2.17 T，与60 K下的被动PFM相比，改进是显着的。
The practical use of high-temperature superconducting bulk electric rotating machines is limited, despite their increased power densities over permanent magnet machines, by the magnetization process of the bulks. A fast and effective magnetization process is needed to promote the practical application of superconducting machines. This is why we developed a method for magnetizing bulk superconductors and trapping high magnetic flux density using a single pulsed field magnetization (PFM). The method of magnetization of the superconducting bulk magnet by controlling the applied magnetic field has been tested previously at 77 K and 70 K. We tried during this study to trap high magnetic flux density in a GdBaCuO bulk at 60 K, to confirm that the method is effective at a lower temperature. Moreover, we tried to improve the method by using negative feedback of the magnetic flux density on the growth sector, to control the chopping of the current flowing through the magnetizing coils. We managed to reduce the temperature rise during the pulse by 10 K compared to a passive PFM and trapped a maximum of 2.17 T in the center of the bulk sample, the improvements compared to passive PFM at 60 K are remarkable.