| Title |
Performance Evaluation of Low Frequency Magnetic Field Shielding by Eddy-Current |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2010.24.9.124 |
| Keywords |
Eddy-Current ; Magnetic Shielding ; Skin Depth ; Helmholtz Coil ; Magnetic Sensors |
| Abstract |
In this paper, the shielding effectiveness of aluminum shielded room with using eddy-current is calculated and measured after fabricated. The size and thickness of shielded room are decided as 2.4 × 2.4 × 2.4[㎥] and 12[㎜] after AC shielding characteristics by eddy-current of conductive materials is analyzed. To verify the shielding effectiveness, a rectangular helmholtz coil is fabricated to generate magnetic field of 1.37[μT] and measured magnetic field inside shielding room for 0.01～10[㎐]. According to calculations and measurements, AC Shielding effectiveness by eddy-current in aluminum is very small for 0.01～2[㎐] and 5 times to 11 times for 5～10[㎐]. |