Re: would you buy this machine?
I don't think that a 2.2 KW VFD would work well with a 5.5 KW motor, the 2.2 KW VFD would barely output enough power to run that motor unloaded. You would be better to run it with the proper sized VFD if you have 3 phase power available.
If you only have single phase available, then you would need a VFD that is rated for single phase input at 5.5KW or about a 10KW VFD that will run on single phase. Another option would be a 10KW rotary phase converter.
Jim Dawson
Sandy, Oregon, USA