Fuzzy logic-based control of superconducting closed-loop current with a linear-motor type flux pump

IF 2.1 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics Pub Date : 2025-07-11 DOI:10.1016/j.cryogenics.2025.104148

Yong Lei, Haoyan Liu, Wei Wang, Chenghuai Wu, Mengchao Zhang, Lin He, Peng Liu, Li Zhou, Yan Li

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引用次数: 0

Abstract

High temperature superconducting (HTS) flux pumps inject superconducting current directly into the HTS closed-loop, eliminating the need for thermally inefficient current leads. To achieve highly accurate closed-loop current, the current control based on flux pump is a topic requires in-depth study. This paper investigates a fuzzy logic control to achieve fast and precise current control with linear-motor type flux pump. The control strategy is originated from the discovered macroscopic magnetic coupling effect (MMCE) . With this method, we optimize and control the DC bias magnetic field to achieve fast and accurate closed-loop current control. In this experiment, we define five degrees of magnetic DC bias field, by which we stabilize the pumping current within 0.6 ‰ accuracy. The precise control of superconducting currents has been achieved, and the influence of the DC background magnetic field on magnetic coupling effects has been verified. This control algorithm is important for HTS applications requiring high current precision, such as magnetic resonance imaging (MRI), etc.

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线性电机型磁通泵超导闭环电流的模糊控制

高温超导（HTS）磁通泵将超导电流直接注入高温超导闭环，消除了对热低效电流引线的需要。为了实现高精度的闭环电流，基于磁通泵的电流控制是一个需要深入研究的课题。本文研究了一种模糊逻辑控制方法，以实现直线电机型磁通泵的快速精确电流控制。该控制策略源于已发现的宏观磁耦合效应。利用该方法对直流偏置磁场进行优化和控制，实现快速准确的闭环电流控制。在本实验中，我们定义了5度的直流偏磁场，通过该偏磁场，我们将泵送电流稳定在0.6‰的精度范围内。实现了超导电流的精确控制，验证了直流背景磁场对磁耦合效应的影响。该控制算法对于需要高电流精度的高温超导应用，如磁共振成像（MRI）等具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cryogenics 物理-热力学

CiteScore

3.80

自引率

9.50%

发文量

审稿时长

2.1 months

期刊介绍： Cryogenics is the world''s leading journal focusing on all aspects of cryoengineering and cryogenics. Papers published in Cryogenics cover a wide variety of subjects in low temperature engineering and research. Among the areas covered are: - Applications of superconductivity: magnets, electronics, devices - Superconductors and their properties - Properties of materials: metals, alloys, composites, polymers, insulations - New applications of cryogenic technology to processes, devices, machinery - Refrigeration and liquefaction technology - Thermodynamics - Fluid properties and fluid mechanics - Heat transfer - Thermometry and measurement science - Cryogenics in medicine - Cryoelectronics