Quote:
Originally Posted by jackbauer
Up and running! I'm a bit concerned if the dc dc and drive circuit can handle the load of 4 devices.
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sweet! it looks like 12V on the scope - is that the gate voltage using the original drive circuit on the control board? Any plans for a dedicated 15V "on" voltage with negative "off" voltage? I know adam has plans for something like that, but if you are using the original hardware, I'm curious how it works.
Also, looks like it's at 8khz - these IGBT's are rated up to 20khz, any plans to push it back to 16khz?
edit:
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...