Re: [TCML] spark gap substitute...?

[Steve Ward <steve.ward@xxxxxxxxx>]

That article sure is vague about IGCTs.  I suspect they are still rather
di/dt limited when compared to IGBTs.  Maybe they would work at 10khz or
something with a lot of effort put into getting zero current switched
conditions.

Funny how they list no deficiencies for the IGCT.  Its more of a sales ad
than anything that useful about IGCTs.

Looking at a real datasheet, the deficiencies seem obvious to me:

http://www.polovodice.cz/_files/specifikace/ti918l-600-25.pdf

Switching speed is several uS (better than i expected, honestly), but the
typical turn off energy is in the 1J range (quite huge compared to an
IGBT).  This means these things wouldnt stand a chance in a DRSSTC where the
switches control the primary current directly, but they might possibly work
as a "spark gap replacement".  Though you would still need to mind the
switching speed issue and make sure the primary di/dt doesnt kill the
device.

Until they start showing up on ebay or surplus, i doubt anyone is going to
build a TC with them (though it looks quite feasible).

Steve

On Wed, Jan 27, 2010 at 12:48 PM, Dex Dexter <dexterlabs@xxxxxxxxxxx> wrote:

> Last word of high power electronics are IGCTs .
> For example, see:
> http://www.polovodice.cz/_files/soubory/igct.en.0805119.pdf
> Anybody have used them for tesla coils already?
>
> Dex
>
> >You would
> > be
> > better off using IGBTs as a replacement for the spark gap <see
> > http://wiki.4hv.org/index.php/SISG>
> >
> > -Phillip Slawinski
> >
>
>
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