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The igbt i'm using at the minute is only 600v 150a. I have 2 1200v 800a units on order from ebay. I may end up ordering more and just use 2 units as freewheel diodes with the gates tied to emitter. I'm actually using one of the gate resistors you supplied in the kit. 30R i think? I'm still trying to wrap my head around the drive equations. The 800amp igbts have a 90pf gate capacitance. So i need to figure out what current i need to swing 180pf (2 devices) on and off at 15.5khz.I think this could be the basis for a high performance option if i get the design right.
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