An air compressor is about the worst application to use a phase converter on because of the starting torque. If you want to run a 3 phase on single phase power, make sure you get a compressor that doesn't load up until the oil pressure builds.
Totally agree. I'd rather buy a single phase motor and switches and to convert to 1phase as run a phase converter. And it would cost about the same money. Welders are kind of the same way. I see guys trying to run 3phase welders through a phase converter and the spike loads take it out.
I'm pretty fortunate that I have 3 phase at my shop. Its kind of expensive electric bill wise, but the used commercial stuff (welders, compressors, etc.) is so much cheaper for better stuff, that it kind of evens out.
I bought a used compressor for my shop several years ago, and would do it again, but I don't mind taking chances on used stuff. I'm a big cheapskate like that, and I'm not sure it works out $ wise in the end, but I feel better giving less money for used stuff. I'm saving the environment by recycling.