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RE: Sold state IGBT disruptive coil spark gap idea

Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>


I got the parts today and built up the circuit. I tested it out and the charging circuit for the gate drive is not working right. Does not look like anything serious, just have to figure it out. I put my notes here:


Sorry, it turned out at 1.8MB with all the pictures...



Hi All,

I was up late last night working on an idea for an IGBT replacement for a conventional coil spark gap. I woke right up at 2PM this afternoon (semi-retired people can do that :O))) and started getting some parts and wrote a paper up on it here:


It is not super cheap, but not insanely expensive either. Might be great for lower voltage MOT systems with E-bay big IGBTs...

There has been ZERO real testing so don't get over excited ;-))

It basically uses IGBTs fired by strings of SIDACs. Each section should be fully independent and they can be put in series as needed for any voltage. One could "tap" the string for various power levels. Power losses seem very pleasant.

It will take some real world testing to see if and how well it works, but the things seems sound. It is an easy and simple circuit that hopefully not much can go wrong with :o))

Parts on order...