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You know, I think you are right about having to monitor bus voltage. I was hoping to just have a fixed duty, but you need to be able to change it on the fly based on the output load. The duty would have to go to zero when motor wasn't using any power, otherwise you are boosting into an open circuit which blasts the crap out of your IGBTs.
Fortunately, I changed it all last night haha. But now that I know it's necessary, I feel a lot better. I'll have to reread what you wrote about the layout later. Right now I'm making BOMs for my job. I'm getting the chance to work with SiC mosfets, and hard switching up to maybe 500KHz!!
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