Re: calculating copper plate indutance (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 23 Sep 2007 16:01:09 +0100
From: Chris Swinson <list@xxxxxxxxxxxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: calculating copper plate indutance (fwd)

Hi Bart, 

Thanks for taking the time to add it in!

I can't get anything to come up in the resistance box though ?

Cheers, 
Chris



> 
> Hi Chris,
> 
> I added copper ribbon resistance to the output as requested.
> http://www.classictesla.com/java/flatribbon/flatribbon.html
> 
> I've got it set to 3 decimal places. If your looking for more precision 
> for small turns, you can always calculate it.
> R=pL/A where p is resistivity of material, L is the length, and A is the 
> cross sectional area.
> 
> So, A = thickness x height
> L = Length of winding
> p = 0.000001678 ohms/cm (the number I'm using anyway)
> 
> The resistivity of copper varies. This is part of the problem with 
> resistance numbers. There are a lot of copper alloys and even processes 
> can change affect resistivity. Temperature is also a large factor. The 
> output value will assume a temp of 20C (68F) and the common resistivity 
> number shown above.
> 
> Take care,
> Bart
> 
>>Would it be possible to mash the resistance calculation into that too , 
>>pretty pleaseeee ;o)
>>
>>Chris
>>  
>>
> 
> 
>