Optimization of a condensed-neon cooling system for a HTS synchronous motor with Gd-bulk HTS field-pole magnets
Optimization of a condensed-neon cooling system for a HTS synchronous motor with Gd-bulk HTS field-pole magnets
复制标题
带有 Gd 块状高温超导场极磁体的高温超导同步电机的冷凝式氖冷却系统的优化
DOI：
10.1088/1742-6596/234/3/032009
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
H. Hayakawa
中科院分区：
文献类型：
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作者：
B. Felder;M. Miki;K. Tsuzuki;M. Izumi;H. Hayakawa
我们实验室开发的轴向间隙同步电机基于 Gd-bulk HTS 场极磁体，当冷却到 Tc 以下时，能够捕获它们所承受的部分磁通量。在液氮温度下，通过脉冲场磁化（PFM），1.04 T 被捕获在直径 60 毫米、厚度 20 毫米的磁体中，导致电机在 720 rpm 时输出功率为 10 kW。为了提高这种性能，我们必须增加块体中截留通量的总量，最短的方法是降低块体高温超导的温度。因此，我们重点改进了冷凝氖冷却系统，即闭式循环热虹吸管，使其提供足够的冷却能力，使包围磁体的转子板达到低温。目前的研究意味着要推出一种新的翅片导向的冷凝室设计；因此，对翅片的各种形状和位置进行了数值计算和有限元软件（ANSYS）传热模拟。然后，提供最佳效率的梯形设计被制造出来，用于在热负载测试配置中进行测试，导致冷却时间除以三，并且承受的最大热负载为 55 W。
The axial-gap synchronous machine developed in our laboratory is based on Gd-bulk HTS field-pole magnets, able to trap a part of the magnetic flux they are submitted to when cooled down below Tc. At the liquid nitrogen temperature, by the Pulsed-Field Magnetization (PFM), 1.04 T was trapped in 60 mm-diameter and 20 mm-thickness magnets, leading to an output power of the motor of 10 kW at 720 rpm. To enhance this performance, we have to increase the total amount of trapped flux in the bulk, the shortest way being to decrease the temperature of the bulk HTS. Thus, we focused on the improvement of the condensed-neon cooling system, a closed-cycle thermosyphon, so that it provided enough cooling power to lead the rotor plate enclosing the magnets to a low temperature. The present study implied coming out with a new fin-oriented design of the condensation chamber; hence, the numeric calculations and FEM software (ANSYS) heat transfer simulations were conducted for various shapes and positions of the fins. The trapezoidal design offering the best efficiency was then manufactured for testing in a heat-load test configuration, leading to cooling times divided by three and a maximum heat load endured of 55 W.