Power electronic equipment regulated by the International Thermonuclear Experimental Reactor (ITER) organization must pass the relevant steady-state magnetic field immunity test. The magnetic field immunity testing equipment studied in this paper is an interdisciplinary problem involving electrical, electronic information, structure, fluid, materials, computers, etc., and involves the integration of industrial information systems. It needs to be studied by using the analysis method of multi physical coupling. On the basis of fluid analysis, acquisition and control research and power supply design, this paper focuses on the in-depth study of the coil body. Through mathematical derivation, the magnetic field calculation formulas of several types of coil structures, two-coil and three-coil configurations are obtained in this paper. On the premise of economy, the optimal general formula of coil structure parameters is obtained. These formulas establish the relationship between the coil parameters and the required uniform magnetic field. The magnetic field distribution under various coil structures is compared and analyzed, and the distribution law is revealed. The model analysis is proven to be correct and effective by finite element software and experimental results. The research of this paper provides a theoretical basis for the design of an induction coil with a high magnetic field and high-quality uniformity.

受国际热核实验堆（ITER）组织监管的电力电子设备必须通过相关的稳态磁场抗扰度测试。本文研究的磁场抗扰度测试设备是一个涉及电气、电子信息、结构、流体、材料、计算机等的交叉学科问题，涉及工业信息系统的集成。需要用多物理耦合的分析方法来研究。本文在流体分析、采集与控制研究和电源设计的基础上，重点对线圈体进行了深入研究。本文通过数学推导，得到了几种线圈结构、二线圈和三线圈配置的磁场计算公式。在经济的前提下，得到了线圈结构参数的最优通式。这些公式建立了线圈参数和所需均匀磁场之间的关系。对比分析了各种线圈结构下的磁场分布，揭示了分布规律。有限元软件和实验结果证明模型分析是正确有效的。本文的研究为设计具有高磁场和高质量均匀性的感应线圈提供了理论依据。对比分析了各种线圈结构下的磁场分布，揭示了分布规律。有限元软件和实验结果证明模型分析是正确有效的。本文的研究为设计具有高磁场和高质量均匀性的感应线圈提供了理论依据。对比分析了各种线圈结构下的磁场分布，揭示了分布规律。有限元软件和实验结果证明模型分析是正确有效的。本文的研究为设计具有高磁场和高质量均匀性的感应线圈提供了理论依据。