Re: tesla-d Digest V98 #580

• To: tesla-at-pupman-dot-com
• Subject: Re: tesla-d Digest V98 #580
• From: Scott Stephens <Scott2-at-mediaone-dot-net> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Thu, 19 Nov 1998 19:54:15 -0700
• Approved: terryf-at-verinet-dot-com

At 08:15 PM 11/18/98 -0700, you wrote:

>Subject: RF resistance of secondary coil

>Original Poster: ElectronX-at-aol-dot-com 
>
>Does anybody have a formula to find the RF resistance of the secondary coil's
>wire.  I want to make some detailed calculations on my coil's Q, but I need a
>way to find the wire's resistance at 300 kHz.  Wouldn't this be dependent
upon
>the frequency and dimensions of the wire?
>
>Matt Behrend

Yes. I can refer you to an article that describes calculating the skin and
proximity effects, in the context of a Tesla Coil, and gives a curve of Q vs
hight/width for .4mm to 1.6mm wire. And I can refer you to design freeware
and shareware that can calculate Rac, so you don't have to work with an ugly
equation. But will you (or some other swell guy) E-mail, fax, or copy me an
additional paper on this topic?

B. Carstens 1995, "Calculating Skin and proximity effect conductor losses in
switch mode magnetics", PCIM'95 seminar notes

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