In this paper, we present the fabrication and performance of a linear-motor type flux pump with a pumped current larger than 640 A. This high-temperature superconducting (HTS) flux pump can be used for magnetic resonance imaging (MRI) magnets and HTS electric machines. We use the flux pump to charge 10 superconducting closed-loops, and show the tested results of pumping current under different applied frequencies and magnetic field amplitudes. This flux pump device can output direct current larger than 640 A at 77 K. The output of this flux pump equals to a DC power source with low output voltage and high output current. Comparing with the traditional power supply of the same rated current, the size of this HTS flux pump is much smaller, while it also eliminates the harmful metal current leads that cause heat leakage. We show that, by increasing the length of the travelling wave region of this flux pump, there is no limit to the output of the current output, which can reasonably reach the kilo-ampere level. The purpose of this paper is to test the reliability of the methodology for the large current HTS flux pump.

中文翻译：

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泵浦电流超过 640 A 的直线电机型 HTS 磁通泵


在本文中，我们介绍了泵浦电流大于 640 A 的线性电机型磁通泵的制造和性能。这种高温超导 (HTS) 磁通泵可用于磁共振成像 (MRI) 磁体和 HTS电机。我们使用磁通泵对10个超导闭环进行充电，并展示了不同施加频率和磁场幅度下泵浦电流的测试结果。该磁通泵装置在77K时可输出大于640A的直流电流。该磁通泵的输出相当于一个低输出电压、高输出电流的直流电源。与相同额定电流的传统电源相比，该高温超导磁通泵的尺寸要小得多，同时也消除了导致热泄漏的有害金属电流引线。我们表明，通过增加该磁通泵的行波区的长度，电流输出的输出没有限制，可以合理地达到千安级。本文的目的是测试大电流高温超导磁通泵方法的可靠性。