Design of a Synergistic Active-Passive Shielding System Using Fe-Based Amorphous Alloy

To address power-frequency magnetic fields and transient magnetic disturbances in power systems, a synergistic active-passive magnetic shielding system is proposed in this paper. By combination of high-performance Fe-based amorphous alloy materials with an optimized three-axis compensation coil, finite element method (FEM) simulations and experimental validation have demonstrated the superior shielding performance of these alloys. The results indicate that this material outperforms conventional materials in terms of the magnetic field decay rate and saturation magnetic flux density. Additionally, a three-axis square compensation coil was optimized by using the simulated annealing particle swarm optimization (SimuAPSO) algorithm for winding, thereby achieving active-passive cooperative shielding that effectively suppresses residual magnetic fields. Experimental results have demonstrated a shielding effectiveness of 38-50 dB in a 1200 μT composite interference field, effectively suppressing both steady-state and transient magnetic field disturbances. This design is suitable for protecting the power equipment. This research explores the potential of Fe-based amorphous alloys for electromagnetic shielding applications.