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Old 03-01-2010, 09:48 AM   #3035 (permalink)
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Location: Ireland
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A few people have asked me what , if any , mods I made to the control board to drive igbts. The answer is none! I did however use the circuit below in place of the normal gate resistor. The purpose is to help the igbt turn off quicker and overcome the "miller knee". If i were doing it again I would change the dc dc converter to one with a 15v output as this is how igbts like to be driven. That said the 12v version seems to work fine on mine. Very low switching losses. Just friday I pumped 250 battery amps through the controller on a hill climb while on the way to see Ireland's answer to Chip Foose The heatsink went from 6c to 8c!
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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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