Estudio de blindaje magnético en materiales conductores en función de la frecuencia

Abstract

In this study is described the effect of a uniform magnetic field in conductive materials, as these shield the field there through. In order to create such a field,a coilis energized by a sinusoidal signal produced by a signal generator with a difference of potential of 10 [Vp]. The magnetic field measurement is performed indirectly by placing a coil like sensor in the center of larger diameter coil performing difference of potential measurement on the sensor, such that by placing a shielding material that encloses the sensor, the magnetic field is reduced inside, therefore the induced tension in the coil also it reduced. The shielding materials used were steel, aluminum, ironand copper;the efficiency of this material was studied in a frequency range from 60 to 100.000 Hz, resulting that iron more efficient than the others from 60 to 12.000 Hz, and for 32.000-100.000 Hz the best shielding material, was copper.