Or an older 415-in VFD with two banks of reservoir capacitors ("bus" capacitors)can be hacked pretty easily by moving the neutral to between the two banks and feeding live to two of the input phases - I'm pretty sure that's how drives direct do it (having looked inside...), they mod new VFDs so may have to get around "phase loss" sensing, which may (or may not) explain why they're damn expensive compared to the unmodified 415v-in version.
The hack does, of course, invalidate all approvals, warranty, probably causes ozone depletion and gerbil warming, but my ABB ACS301 has been quite happy - the other downside is eventually under-voltage alarms show up due to the bus capacitors aging faster due to higher peak currents, which is a Clue that it's time to replace 'em...
Dave H. (the other one)