I have released a small Linux command line program to calculate the extra resistance due to skin effect in a wire.

Just to make your world more complicated, see pages 6 thru last of this Micrometals pdf regarding proximity effect.

It sounds like you may be picking up where Reg left off.

like this:

Skin effect isn't very exciting below 1 MHz. However, proximity effect is much more exciting and swamps out skin effect in low freq (

On a sunny day (Wed, 25 Feb 2009 09:23:08 -0600) it happened "amdx" wrote in :

Thanks. Interesting, well, anyone is free to upgrade the soft ;-)

Not when you put copyright declarations all over the place, and do not release the source.

As a person who has never done RF design I was fascinated. What training I had in RF never reached this level of precision.

As this is new reference material for me, I became curious about whether it will survive on the internet.

The web page with graphics partially survives in the archive, without illustrations, but the PDF appears to survive better complete with illustrations.

Link Jan posted on various types of power loss

Latest archive at this posting, but archive does not have illustrations.

Archive list for future archival reference also minus illustrations

Link Mike posted on proximity effect

Jan 1 2007 version in archive (Since it's PDF, illustrations survive)

list of versions in archive

t, at

swers like this:

wire.

Skin effect can matter at low frequencies if the conductor is big enough. Even at audio frequencies it limits how far into the earth an AC current will flow.

IIRC the skin depth is 8mm at 50Hz in the copper asumming the uniform H field and the infinite flat conductive plane. The skin depth is inverse proportional to the square root of the frequency. This is important at the high currents even at the low frequencies. What it tells there is really no point in making the conductors thicker then several mm, but increasing the surface area is much more efficient.

Vladimir Vassilevsky DSP and Mixed Signal Design Consultant