Title :
Magnetic field attenuation of nonlinear shields
Author :
Celozzi, Salvatore ; D´Amore, Marcello
Author_Institution :
Dept. of Electr. Eng., Rome Univ., Italy
fDate :
8/1/1996 12:00:00 AM
Abstract :
The analysis of shielding performance of planar shields against near field sources is carried out in the time domain to account for the nonlinear behavior of ferromagnetic materials used in low frequency applications. To this end, the Schelkunoff approach for shielding problems has been reformulated in the time domain introducing the transient wave impedances which relates transient electric and magnetic field components and appear in the integrodifferential boundary conditions. The final equation system is solved by means of a numerical procedure based on the finite element method. The obtained results are compared with analytical and measured data in different configurations
Keywords :
electric impedance; ferromagnetic materials; finite element analysis; magnetic fields; magnetic shielding; time-domain analysis; transient analysis; Schelkunoff approach; ferromagnetic materials; finite element method; integrodifferential boundary conditions; low frequency applications; magnetic field attenuation; measured data; near field sources; nonlinear behavior; nonlinear shields; numerical procedure; planar shields; shielding performance; time domain; transient electric field; transient magnetic field; transient wave impedances; Attenuation; Boundary conditions; Frequency; Impedance; Magnetic analysis; Magnetic field measurement; Magnetic materials; Magnetic shielding; Performance analysis; Time domain analysis;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
