Andy, by the way, I tried a Delon doubler on a 240VAC 3ϕ VFD from 120VAC 1ϕ. I seem to recall the DC output was around 360VDC, but the VFD didn't seem to mind. I was hoping to try the Delon on 240VAC 1ϕ, but it seems the output would be around 720VDC, which would be significantly beyond the expected DC voltage for 440VAC class VFDs. More work needed.
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