[MPaulHolmes]

Dang it it's so much fun when a bunch of people are sharing ideas!

EDIT: I'm not aware of any license for anything. I'm just hanging out at home, making stuff up as I go. haha. Thankfully, I don't teach at Maricopa HS. I used to teach at a high school for one horrible year. I don't actually have much of any sort of plans for anything. I'm just trying to make an AC controller that people can adapt and change the code how they see fit for their own needs. I don't see the software as too bad. The boost stage addition stuff, I'm told (by the EVTech list), will work, but it does add a level of complexity.

For the boost stage, since the board that's on its way wasn't for driving 4 half bridges (only 3),you would just need one more dual igbt, and two isolated power supplies/drivers. Then, you just need a fixed "duty" and "1-duty" that would give you the right output voltage (+/-, ignoring sag). Maybe you could send 5v, ground, +24v, etc... over to that board. Then, maybe it could have a little 8 pin micro that does nothing but spits out that fixed duty and 1-duty. Maybe I could make a little driver & isolated supply board. It will already have an ATTiny25 micro on there acting as an oscillator for the isolated supply. Maybe it could optionally (using jumpers) also generate the 2 fixed duties. so it could be a standalone boost/isolated supply/driver board, or just an isolated supply/driver board if you leave off the jumper.

At the moment, I only have 600v 600amp IGBTs. If people were wanting to drive that 650v motor, you would also need a different ring cap, and 1200v IGBTs. They have an 800v ring cap now.