Re: AC wire resistance with proximitry effects

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi Bart,

I'll be happy to write a little program to independently compute Rf 
and Q if you send me the collection of data (including Ldc, Cdc, Les, 
Ces, Qmeas, etc)  for a variety of coils.  This would be a good cross 
check on the java (or spreadsheet) implementation.  When you speak of 
Q error, are you comparing to the measured Q by the coil data provider???

The main reason for thinking that Les and Ces are the right values to 
use is the transfer function that defines Q is based on the L and C 
that correctly predicts the resonance that we are measuring Q for.


> Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
>
> I have tried using Les and Ces with Fraga, but I have seen Q error 
> increase when I've tried it with Fraga. However, tonight I found an 
> error with effective Rho. I had parenthesis wrong as well as a 2* 
> where it didn't belong. So, all is lost :-( . (well, not all). As 
> soon as I corrected it, Fraga Q went high and now I can see why you 
> are contemplating Les. It would certainly make the numbers better.
>
> What does concern me however is even current distribution was an 
> assumption in their work.
>
> I'll have to go all back through  it.
>
> Thanks for being persistent.

Well, that's my middle name :o)))

Take care,
Gerry R