[Prev][Next][Index][Thread]

Re: tesla-d Digest V98 #580



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