Optimal coil configuration analysis for the high-uniformity and large-caliber magnetic field immunity testing system

Abstract

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.