I went the other way, I have one commercial rotary phase converter, which is nothing more than a static converter plus a 5 HP idler motor. This would allow you to drive anything in your shop up to something less than the 5 hp.
I have also made a unit, and there are free plans on the internet for making anything from a simple static unit to a fully automatic unit. I will be making another larger unit to drive my 3 phase welder when I finish building my shop. This unit will have a 10 hp idler, or 2 5 hp units if I can't find a 10.
I have some links, if there is someone interested in learning how they work or want to make one.
Bob
