RE:Bare SIDAC vs. SIDAC / IGBT Circuit

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

Hi,

Just to follow up...

I compared the SIDAC / IGBT gap to just shorting across the terminal 
will a heavy jumper wire.  The SIDAC/IGBT gap was fare better than I 
could do with a direct short!!

http://hot-streamer.com/temp/SIDAC-IGBTvsWireShorting.gif

The SIDAC / IGBT gap is in white and one of my better wire shorting 
attempts is in yellow.  The smaller the spark when I short it with a 
wire, the less lossy it is.  But I could never get near the SIDAC / 
IGBT gap especially in the latter time frame.  The spark probably 
heats up the contact area cause high losses later on.

I was using a direct short to judge the SIDAC gap's efficiency.  I 
guess it is well past 100% now ;-))

Cheers,

        Terry



> Hi,
>
> I compared my new SIDAC / IGBT circuit to a bare SIDAC to see how 
> the losses compared.
>
> At low currents the SIDAC was not super lossy.  However at high 
> currents, the SIDAC was very lossy and probably would not work for a 
> spark gap in a Tesla coil at all.  I wrote up a little blurb here:
>
> http://hot-streamer.com/temp/SIDAC-e-Test.pdf
>
> Cheers,
>
>         Terry