Quote:
Originally Posted by jyanof
with regards to the waviness - it looks like the paths from driver to gate are significantly longer than before (though I don't know what your current IGBT setup looks like - maybe it's about the same?). But, I've read that keeping these paths short will reduce parasitic inductance that can lead to 'gate ringing'. The gate capacitance basically forms an LC oscillator with this inductance. I'd think you'd get a much higher frequency 'ring' though...
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I talked to Fran today who recommended using powerex modules and he said that he has observed this ringing in his designs and its completely normal.
I cant wait to get the ones I have built into power stages for my controller now!!
-Adam