3-D modeling of thin conductive sheets for magnetic field shielding: calculations and measurements

This paper prescnts a new technique for calculating the magnetic field shielding effectiveness of thin conductivc sheets of materials, The shccts are modeled as meshes of passive shiclding wire filaments. Using this technique, complex three dimcnsional sources and shield configurations can be easily modeled. A computer program was developed to perform the calculations, and a comprehcnsive set of expcriincnts was performcd to verify the technique. Calculations and measurements are compared in the paper. The calculation method provides a numerical and experimentally veriried lechniquc fur evaluating the shiclding cffectiveness of thin conductivc sheets for power system magnetic field shielding applications. A predictive method such as this is becoming increasingly important as conductive materials are increasingly bccoming acceptcd as effective shielding matcriills.