Re: Hot Primary

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Dan,
 
On 2 Jul 2002, at 20:53, Tesla list wrote:

> Original poster: "Daniel McCauley by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>
> 
> 
> > Hey all,
> >    What would be the cause and cure for a primary getting hot?
> 
> 
> First you have to think what does heat look like in a circuit?  Basically
> its a resistance in the simplest form.
> You have some current passing through your wire, and some resistance element
> (of course in real life this is a complex impedance)
> Current through a resistor produces heat!
> 
> Some likely causes:
> 
> 1.  Wire gauge is too small for the amount of current you are passing
> through it.
> 
> 2.  Operating frequency is low.  Remember your primary is a big inductor.
> At low frequencies, the impedance of this coil will get much larger to at DC
> it would be a short circuit.

Re #2 - I would have said that the opposite applies. 

Malcolm