I'm interested in this as my lathe currently runs from an inverter from an outfit that took an ABB inverter (380-380) and fiddled with it. This outfit, no longer in business, seem to have put some kind of voltage-doubler circuitry on the input. The inverter is excellent, but the problem is that the input circuitry cannot handle heavier loads and there is too much ripple so that the inverter trips out. It's a 5HP (4KW or so) inverter driving a 3HP motor so that bit is well within its ratings.

I keep wondering about finding a suitable 240-380V transformer as per m_c's suggestion but these don't come cheap. So the Ecogoo inverters look interesting, but I'm not sure what the performance would be like at 50Hz as I'm running a conventional 50Hz motor. The motor isn't suitable for rewiring for 240V, unfortunately.