The linear-motor type flux pump is a wireless DC power source for high-temperature superconducting coils, which is compact in size, efficient in energy use, fast in output control, etc. It consists of three major parts: DC windings, phase windings and iron circuit, which generates a DC-bias AC travelling wave in its airgap. In theory, there are three controllable parameters such as DC-bias field, amplitude of the AC travelling wave, and the field frequency (travelling speed). By changing those parameters, we change the applied fields and its DC output current into superconducting coils. For studying the impact of those parameters on its DC output, this paper uses a fixed step algorithm to collect the current charging data, by automatically controlling the flux pump device, and then establishes an output database. By using this algorithm, we have searched out the maximum pumped current and analyzed the impact of the three parameters. We have also found out that, in order to get maximum current output, the value of the DC-bias field should be close to the amplitude of AC magnetic field.

中文翻译：

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建立直线电机型磁通泵充电数据库并利用固定步长搜索算法分析直流偏置场的影响


直线电机式磁通泵是一种高温超导线圈无线直流电源，具有体积紧凑、能源利用效率高、输出控制速度快等特点，由直流绕组、相绕组三大部分组成和铁电路，在其气隙中产生直流偏置交流行波。理论上，可控参数有直流偏置场、交流行波幅值、场频率（行进速度）等三个参数。通过改变这些参数，我们改变了施加的场及其进入超导线圈的直流输出电流。为了研究这些参数对其直流输出的影响，本文采用固定步长算法，通过自动控制磁通泵装置来采集当前充电数据，然后建立输出数据库。通过该算法，我们找到了最大泵浦电流并分析了三个参数的影响。我们还发现，为了获得最大电流输出，直流偏置磁场的值应接近交流磁场的幅度。