Re: Saturable Reactors (yes, again :)) (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Wed, 15 Feb 2006 08:33:56 -0800 (PST)
From: J. Aaron Holmes <jaholmes@xxxxxxxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Saturable Reactors (yes, again :)) (fwd)

Or perhaps even this recipe is too complicated.  What
about just putting two identical single-phase
transformers together so that their outputs are in
series opposing, leading to 0V.  Across the series
output, you now apply a DC control voltage, such as
the rectified output of a variac.  Would *that* work?

If my thinking is not conspicuously incorrect, perhaps
somebody with two identical small transformers would
give it a shot and tell me if it does actually work? 
I can't think of why it wouldn't...or perhaps I just
can't think ;-)

A couple of identical MOTs might work, provided the
output voltages really are the same.  I can well
imagine that with how MOs are slapped together, the
tolerances are probably pretty lowsy.

...anyway, as you can see, I'm trying to discover a
way to build a saturable reactor without doing any of
my own winding, as that seems awful work, particularly
if you're going for higher powers and using
heavy-gauge wire.

Regards,
Aaron, N7OE
 
> 
> ---------- Forwarded message ----------
> Date: Sun, 12 Feb 2006 09:55:01 -0800 (PST)
> From: J. Aaron Holmes <jaholmes@xxxxxxxxxxxxxxxxxx>
> To: hvlist@xxxxxxxxxx
> Subject: Saturable Reactors (yes, again :))
> 
> Hi folks, I decided to join the party and try
> building
> one of these.  It seems to me, however, that the
> simplest way to make a big one might be to start
> with
> a ready-made three-phase transformer.  Does that
> seem
> reasonable?  If you're going for a turns ratio
> (control:power) of around 10:1, then a 4160V/240V
> (or
> close) 3PH transformer might be just then thing,
> yes? 
> It would seem like there'd be no winding to do at
> all;
> you'd use the HV winding in the middle for the
> control
> winding, and the LV windings on the outer legs for
> the
> power windings.  You'd have to disconnect the
> windings
> first, since their connections when used as a
> three-phase transformer would obviously be all wrong
> for this application.
> 
> Hmmm...
> 
> Regards,
> Aaron, N7OE
> 
> 
> 
>