Until I build a shop, I'm limited to a good old residential 110v, 15-amp-limit circuit. Yuck! Assuming I want to run a 3-phase motor with VFD, I'm trying to figure out the strongest motor I can run is. The question is proving...a bit complicated.
Take this fairly basic motor for example:
(This might be mislabeled, because the pl;ate on it says it's 2HP). The rated amperage is 2.69 at max frequency. Now if I go by P=IV then at 110v in, I'd be looking at 10.76 amps. But...there's no way it's that simple. The VFD is doing a more than just stepping the voltage up or down, so it could be drawing something larger and losing it through heat. And then there's inrush current to the motor consider; will a VFD cut that off or will that still go substantially higher than 15amp and trip the breaker?
I guess what I'm really asking -- is there a page somewhere that breaks down how to calculate what the best you can handle on such a line is? I feel like there's no way a simple proportional P=IV calculation would be correct here because I know I shouldn't be able to run a 2hp motor on this line!