Eddy current depth penetration
Depth of Penetration & Current Density. Eddy currents are closed loops of induced current circulating in planes perpendicular to the magnetic flux. They normally.
The depth at which eddy current density has decreased to 1/e, or about 37% of the At two standard depths of penetration (2d), the eddy current density has.
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How deep eddy currents penetrate into a material is defined as the depth at which their intensity drops to 1/e (about 37 %) of their original intensity. This is the .
Description:Real-World Considerations There is a big gap between theory and reality, though. Materials to be tested can be non-ferromagnetic or ferromagnetic. However, such frequencies require coils with more windings, ergo larger coils, which lowers probe resolution and makes results noisier. Nowadays, most available test instruments deliver frequencies as low as 5 Hz to several tens of megahertz. Permeability is, also, not uniform.