Posted to alt.electronics
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Variac current question
Lieutenant Scott wrote:
On Sat, 05 Jan 2013 11:30:14 -0000,
wrote:
Lieutenant Scott wrote:
On Fri, 04 Jan 2013 13:14:54 -0000,
wrote:
Snip
Sorry I've been away so long!!
Your diagram is not going to happen.....ever!!
Primary power = 240 Vp times 1.5 Ip equals 360 Watts
Secondary power = 120 Vs times 3.0 Is equals 360 watts
Secondary power equals Primary power, so no (i.e. zero, zilch) power
can
be dissipated in the top half of the transformer, so zero voltage
developed across the top half of the transformer, so Vs must equal Vp,
i.e. 240 V not the 120 V your diagram shows.
Not going to happen....ever!! Sorry!!
Daniel
It was simply a rough diagram to work out the approximate current flow,
I was assuming no losses!
In my calculations I was assuming no losses, too, so it doesn't work, in
any case.
Daniel
The diagram I drew at http://petersphotos.com/temp/transformer.jpg makes
perfect sense to me.
If you create a secondary coil in the lower half and seperate the two
circuits, it's just like a normal transformer.
If.....If.....If
What you drew *Will not* work! No if's, no but's, no maybe's!!
Daniel
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