Hey Christopher,
I would always recommend a VFD that has Sensorless Vector Control which is the case e.g. with the Hitachi WJ200, the Omron MX2, the Hitachi S1, and the Invertek E-3, and with many serious VFDs more.
If you choose the Hitachi WJ200 or the Omron MX2, which are excellent VFDs, you got to know that they are both practically identical. All the settings and options are identical and also the manuals have the same content (with extremely little exceptions) (Omron MX2 User’s Manual, Hitachi WJ200 User’s Manual).
The right model for single-phase 200-240 V input for driving a 2.2 kW motor is called either
and the WJ200 equivalent is called
Be careful to choose the right model if you have split-phase electricity (240 V), since you got to buy these models which receive their power over one single phase.
Only buy the three-phase 200-240 V input model if you are sure you have three-phase 208 V with all three phases accessible in your panel box.
Here you can see the nameplates of the single-phase models (I own the Omron). One difference is only the maximum frequency, which is 580 Hz on the Omron MX2, but this is only necessary for spindle speeds of up to 35,000 rpm (which are very expensive spindles). With 400 Hz you can drive the usual 24,000 rpm spindles.
