Re: Sold state IGBT disruptive coil spark gap idea

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

Hi,

I just did some high current testing.

http://hot-streamer.com/temp/Sidac-Gap-5.pdf

Looks like the IGBT I have been using is good to 350 amps.  That is 
OK for most coils but I was hoping to get to 500 amps.  At about 380 
peak amps the IRG4PSH71KDPBF pulls out of saturation.

I could push 550 amps through it but it was pulling way out of 
saturation at that point.   But it did not harm the circuit ;-)  For 
really high peak currents, a "bigger" IGBT will be needed.  That 
should just be a matter of using a different IGBT without any other 
circuit modifications.

I have now done all the testing I can think of on the bench.  I am 
not going to work on sync triggering or quenching at the moment, but 
rather work on getting a real coil going now ;-))

Cheers,

        Terry