220 will make a huge improvement. I’ve found a good rule to follow for how much HP is needed to make a belt grinder to preform well, is for every inch of belt width you need minimum 1 HP. For example 2in wide belt, 2hp. Your desired belt surface speed also plays a role, but this formula is a good starting point. More HP is you required when grinding a large surface. No such thing as too much HP. I personally like a 1.5 HP to belt width ratio, but I overdrive the belt to get surface speed up. Also a platen will eat up HP. A soft contact wheel or slack belt is easier on motor loads.
A grinding disc formula is (diameter of disc x .25) is HP MINIMUM for adequate grinding performance. For example a 12in disc would require 3hp to perform well grinding metal with a 36 grit media. A heavy disc can make up for lack of HP if more performance is needed.
If a motor isn’t available at the recommended HP per the formula, Its a good idea to go to the next motor size up not down. That’s my 2 cents.
Everything in my shop is using 3 phase motors and VFDs running on 220v single phase. I try to use lower rpm motors because they can readily be cranked up to twice the rpm with the VFD and you can even underdrive them by up to 50% under light loads. You can also set up variable speed or calibrate 2 or more switches to rpm setpoints. Cheap chinese VFDs need to be at least 1.5X the motor rating or you will have issues and AI does a very good job of getting your setup on the VFD program correct and troubleshooting it. If your motor has capacitors sticking out of it a VFD will not work on it.
Im not a expert but when you take the load on a 3 phase motor and supply it with single phase through a VFD the amp load goes up plus the Chinese VFDs are way below what they say they can do so a 1hp motor needs almost a 2hp VFD, plan yo spend $175 or more on it.
That 2.2kw one would push a 1hp motor if it has a heavy load like air compressor startup. You will need to play with start ramp time and power boost and dont plan to brake it to a stop in 1 second. And make sure the motor will work with it. Ask AI to spec it out and help set it up.
And most of us here have no need for a name brand $1000 industrial motor. A $300 offering from surplus center is a solid choice with a amazon vfd or you can roll the dice on a ebay sub $200 motor and see how much abuse it can take.
