Discussions About Measurement Results of Levitation Force and Its Time Relaxation Between GdBCO Bulk Superconductors and Superconducting Magnet With a High Magnetic Field Gradient
Discussions About Measurement Results of Levitation Force and Its Time Relaxation Between GdBCO Bulk Superconductors and Superconducting Magnet With a High Magnetic Field Gradient
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DOI：
10.1109/tasc.2009.2019202
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发表时间：
2009-06
影响因子：
1.8
通讯作者：
S. Araki;K. Nagashima;H. Seino;Y. Miyazaki;K. Takeuchi;M. Murakami;T. Suzuki;T. Murakami;K. Sawa
中科院分区：
文献类型：
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作者：
S. Araki;K. Nagashima;H. Seino;Y. Miyazaki;K. Takeuchi;M. Murakami;T. Suzuki;T. Murakami;K. Sawa
高温块状超导体在飞轮储能系统等多种工程应用中具有重要的潜力。该系统有望通过使用块状超导体来减少轴承的能量损失。最近，作者开发了一种新的超导磁体来实现大的悬浮力。磁铁在同一轴上有两个线圈，每个线圈的电流流向相反的方向。在该系统中，磁场的轴向分量相互抵消，而磁场的径向分量有望得到增强。在本文中，作者用这种新型磁体测量了一体和二体两种情况下不同体积位置的悬浮力及其时间弛豫。结果表明，两个悬浮体的悬浮力是一个悬浮体的两倍，且悬浮体的时间松弛减小。此外，在样品表面附加霍尔传感器，测量表面磁场分布。讨论了磁场的行为。
High temperature bulk superconductors have significant potential for various engineering applications such as a flywheel energy storage system. This system is expected to decrease the energy loss by using bulk superconductors for the bearing. Recently, the authors have developed a new superconducting magnet to realize the large levitation force. The magnet has two coils on the same axis and each coil's current flows to the opposite direction. In this system, the axial component of magnetic field is canceled each other but the radial component of magnetic field is expected to be enhanced. In this paper, the authors measured the levitation force and its time relaxation at different bulk positions in both cases of one and two bulks by using this new magnet. From the results, it was made clear that the levitation force of two bulks was twice as large as that of one bulk and its time relaxation was decreased. In addition, Hall sensors were attached on the sample surface to measure the surface magnetic field distribution. The behavior of the magnetic field was discussed.