Re: variac voltage out (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 13 Jun 2007 19:06:27 -0600
From: Hydrogen18 <hydrogen18@xxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: variac voltage out (fwd)

might work, but I wouldnt want to try it. the lines of flux per sq inch in 
the transformer would double so unless this was a very conservatively 
designed transformer I doubt it'd be very useful for any substantial current 
at 280 volts output

Perhaps a more thoroughly educated member of the board can correct, but I 
beleive the saturation density can be easily found by applying low voltage 
AC current across one end of the variac and the wiper and then turning the 
wiper so that it reduces the number of turns until saturation is reached. 
Then with core measurements and counting the number of turns and some simple 
formula the exact density at which saturation occurs can be calculated.

Of course, the real question which arises to me is the ambiguity of what 
exactly the defining charateristic of saturation of laminated iron core 
transformers is that can ascertained with common electrical measurement 
devices.

Eric
----- Original Message ----- 
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Wednesday, June 13, 2007 3:33 PM
Subject: variac voltage out (fwd)



---------- Forwarded message ----------
Date: Wed, 13 Jun 2007 17:43:38 -0400
From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: variac voltage out

Hey all,
     can you put 240V through a 0-140V variac to get 280 out, or will it
melt or saturate or any other bad things happen to it?  Thanks a bunch.
Scott Bogard

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