Skin effect is a phenomenon in alternating current systems where, at increased frequencies, current crowds toward the conductor's outer surface, raising its resistance.
Skin effect is a phenomenon in alternating current systems in which, as frequency increases, the current tends to flow more and more near the outer surface, or skin, of a conductor rather than uniformly through its cross section. Because the current uses less of the conductor's interior, the effective resistance rises, and the phenomenon grows more pronounced the higher the frequency. At high frequencies, the center of a conductor carries little current.
The skin effect is why surface conductivity matters so much at high frequencies, and it explains the value of silver-plated conductors, whose highly conductive surface carries the high-frequency current. It also underlies constructions like litz wire and segmental conductors that are designed to counter the effect.
In commercial and industrial high-frequency systems, the skin effect influences conductor choice and cable design. Recognizing the phenomenon helps in understanding why high-frequency cable is constructed as it is.
Because surface conductivity matters so much at high frequencies, the skin effect explains the value of silver-plated conductors, whose highly conductive surface carries the high-frequency current, and it underlies constructions like litz wire and segmental conductors designed to counter it.
At Windy City Wire, an understanding of phenomena like the skin effect supports the selection of cable suited to high-frequency applications. Recognizing how surface conductivity matters at high frequencies helps customers appreciate the construction of coaxial and signal cable for demanding commercial and industrial systems.