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Registered Member #5258
Joined: Sun Jun 10 2012, 10:15PM
Location: Missouri - USA
Posts: 119
Hey Kizmo, I hadn't asked because I noticed others had already asked for schematics but, ya, would love to see those as well. It looks like a DRSSTC setup and I'm sure it's close, but the devil is in the details. Also I was really curious about your tank coupling. Regarding the inverter connected directly to the tank through a matching inductor and dc blocking caps, aren't you worried about not having isolation from mains on the working coil? Seems dangerous. Maybe I'm not seeing it correctly in the videos but that's what it looks like. I know the LCLR setup is obviously a working proven method, but I would be curious to see the potential difference between your working coil and say earth ground or mains neutral during operation. Anyway, great build, would love to see more of those details.
Registered Member #599
Joined: Thu Mar 22 2007, 07:40PM
Location: Northern Finland, Rovaniemi
Posts: 624
It used to be based on LCLR topology with matching inductor but my big slow 400Amp igbts didnt quite like the way this simple feedback driver makes them hard switch at turn off.
So i converted it later to transformer coupled series resonant thingie. And i power all my builds from 3phase isolation transformer stack so i dont have these grounding issues. Going from LCLR to series resonant reduced transistor heating by a lot :)
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OMG Induction Heater
