Quote:
Originally Posted by Automcdonough
looks like I'm not too late to this party. I'm an EE with experience making DC-DC converters and rectifiers.. mostly in the 300W~2kW range.. 360VDC input side.
I just now came across this in my quest to DIY a motor driver.. I might have had some circuits to toss at you for the DC version but I'd rather concentrate on this as I'm on a mission for AC.
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I remembered that I saw a post from AutoMcDonough offering to help with DC-DC design. Just a thought, but since this is your space, and since Paul is designing out the expensive/hard-to-find DC-DC, this might be a great back-up option if the parts count is low and inexpensive. What is interesting about your offer is that you've got experience powering the DC-DC from the high-side. That is an interesting twist, except pack voltages are all different in our applications. Basically, we move the opto's to the other side. Just a thought, but since this is your space, and since Paul is designing out the expensive/hard-to-find DC-DC, this might be a great back-up option if the parts count is low and inexpensive. Well, maybe you have a good isolated DC-DC powered by the controller voltage?
One last thought... I saw a high-side/low-side IGBT driver with an appnote that didn't require DC-DC. The IGBT driver could drive the 20v and tolerate the batt voltage directly. Now, where did I find that driver chip? I left it somewhere in this Internet.