Simulation of the Waveform Control Pulse Magnetization of a High-Temperature Superconducting Bulk With Negative Feedback
Simulation of the Waveform Control Pulse Magnetization of a High-Temperature Superconducting Bulk With Negative Feedback
复制标题
负反馈高温超导块体波形控制脉冲磁化的仿真
DOI：
10.1109/tasc.2021.3138835
复制
发表时间：
2022
影响因子：
1.8
通讯作者：
Ida Tetsuya
中科院分区：
文献类型：
--
作者：
Caunes Antomne;Imamichi Hayato;Kawasumi Nagisa;Izumi Mitsuru;Ida Tetsuya
超导块材的脉冲磁化对于促进超导技术在各种商业应用中的使用具有吸引力。一些研究人员一直在开发新的磁化技术，以改善脉冲磁化获得的捕获磁场。波形控制脉冲磁化（WCPM）是一种新型的磁化技术。WCPM已经在我们的实验室开发了几年，到目前为止已经显示出有希望的结果。在本文中，为了更好地理解和改进WCPM，对磁化技术进行了数值模拟。采用COMSOL Multiphysics软件模拟了由一个（RE）Ba_2C_3O_（7-δ）（REBCO，RE =稀土）块体夹在两个涡旋型线圈之间的实验装置，该装置类似于轴向间隙型超导旋转电机的内部结构。本文采用耦合H-A场公式，用磁场求解超导体所在区域，用磁矢势A求解涡旋线圈所在区域。一个热模型已被添加到考虑在磁化过程中的温度上升的散装。线圈通过电路接口连接，其中已经实现了我们的脉冲磁化系统的电路。使用一个简单的脉冲磁场磁化获得的捕获磁通密度与WCPM使用负反馈获得的捕获磁通密度进行比较。的重要参数进行了讨论，以及这种技术在磁化过程中的发热量的影响。
Pulsed magnetization of superconducting bulks is attractive for promoting the use of superconducting technology in various commercial applications. Several researchers have been developing new magnetizing techniques to improve the trapped magnetic field obtained with pulsed magnetization. Waveform control pulsed magnetization (WCPM) is one of these new magnetizing techniques. The WCPM has been developed for a few years in our laboratory and has shown promising results so far. In this presentation, a numerical simulation of the magnetization technique has been performed with the aim of better understanding and improving the WCPM. The experimental setup, consisting of one (RE)Ba2C3O7-δ(REBCO, RE = rare earth) bulk sandwiched in between two vortex type coils similar to the internal configuration of an axial-gap type superconducting rotating machine has been modelled in COMSOL Multiphysics. A coupledH-Afield formulation has been implemented so that the regions containing the superconductor are solved using the magnetic fieldHand the surrounding regions, containing the vortex-type coils are solved using the magnetic vector potentialA. A thermal model has been added to consider the rise of temperature in the bulk during the magnetization. The coils are connected through a circuit interface, in which the circuit of our pulsed magnetization system has been implemented. The trapped magnetic flux density obtained using a simple pulsed field magnetization is compared by the trapped magnetic flux density obtained with WCPM using negative feedback. The important parameters are discussed as well as the impact of this technique on the heat generation in the bulk during the magnetization.