RE: phase shifter instead of variac use

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Black Moon" <black_moons@xxxxxxxxxxx>

I think the problem comes from the fact a triac is either full on or off, 
and you need actual current limiting to prevent the pig from looking like a 
near dead short when the secondary arcs

> From: "Tesla list" <tesla@xxxxxxxxxx>,")"@pupman.com (by way of Terry 
> Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>)
> To: tesla@xxxxxxxxxx
> Subject: phase shifter instead of variac use
> Date: Tue, 04 Jan 2005 15:32:14 -0700
>
> Original poster: Dieter.Boeckeler@xxxxxxxxxxx ( 
> =?iso-8859-1?Q?"Dieter_Böckeler"?
> Hi all,
> an idea:
> is it possible to use a big phase shifter with current regulator for 
> teslacoils.
> for example:
> A semiconductor module with two thyristors (called powerblock)
> in a W1C circuit.Such powerblocks can easily handle a lot of current
> (eupec TT95N12=95A 1200V).The moduls with cooling and
> R-C-safety circuit are very compact and the unit with controller weight a 
> lot less! than a variac with 95A.
> O.k.I don´t need 95A but these modules are the smallest available for 
> me.(no cost)
> In the company I work we use those circuits like
> W1C (1-phase primary shifter),W3C(3-phase primary shifter)
> to regulate the primary current of high current transformers.
> best regards
> alex