http://www.driveswarehouse.com This is one drive supplier in the USA. It looks like most of the drives above 3 HP have 3 phase input sections. The original poster doesn't infer a need for a VFD per se, but rather just an inverter.
Inverters, VFDs, and UPSs all hang out together in my head. I think of an input section that is either a single or 3 phase rectifier or perhaps, a 3rd rail voltage conditioner. Then, I think of a DC bus which may or may not have a battery string attached. Next, you will have a single or 3 phase inverter. It will either be controlled by a variable frequency driver or one that is phase locked to the alternate source. In the case of a UPS, should the alternate f drift out of tolerance, it will likely switch to an internal reference. (not good) Then, usually snubbers and chokes and output tranformers. If you have a UPS, you then hopefully have a full static bypass switch with mechanical bypassing for maintenance.
With new technologies, we get to learn new terms. For IGBTs, the most evil term is de-saturation or just "desat". It is used to describe the act of turning a 400 amp, 1200 volt dual IGBT into a $300 firecracker.
Joe
