Re: Aluminium aka Aluminum Wire (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

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Date: Sun, 30 Sep 2007 16:03:50 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Aluminium aka Aluminum Wire (fwd)

Hi Gary, Ed, All,

With this copper vs. aluminum thing, I updated Javatc to include a check 
box in both the secondary and primary windings that will indicate 
aluminum or copper used for the winding. DC resistance, AC resistance, 
and Q will be affected as the check box internally selects the 
resistivity of the material used.

So if you want to analyze the copper vs. aluminum thing (including 
things like #10 wire or #12 wire equivalents), you can use Javatc for 
even that. You will see AC resistance, sD affects, and basic DC 
resistance differences between the two common materials. Copper is the 
default. So if you "clear" inputs, the check boxes go back to Copper.

I also introduced a DC Resistance for the primary section. This output 
is in milliohms. In the secondary resistance numbers, I added a few 
decimal places to the outputs (because I personally like to run 
primary's in the secondary section to look a little deeper at things 
from time to time). As has been for some time, temperature selection 
changes the resistance (just like in real life). The default is 20C (68F 
for the US).

Version 11.2 is now up and running with these minor changes. Resistivity 
values have always been part of all resistance calculations. All I had 
to do was define a variable for different material resistivities and 
give a selection to the user. Hopefully I didn't screw anything up in 
the process.

http://www.classictesla.com/java/javatc.html

Take care,
Bart