Powerex IGBT, 400A, 600V, CM400DU-12F Mod 4 Piece Lot - eBay (item 190305777785 end time Oct-28-10 00:30:03 PDT)
these are the guys you need. I'm building a new controller with 4 off. Beauty is that you short the high side gate emitter and it becomes the freewheel diode. I'm using a 15v dc dc converter on the control board in place of the 12v for extra turn on power. Regards calculating the switching times yeh you can do the math but why bother. At the end of the day you need the lowest toff and ton that you can find and afford. Your 1200amp module probably has a very high gate charge hence the slow switching.
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
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