[tool_man]

O.K....I used to own an electric motor shop.I worked on many commercial rotarys and found most to be nothing more than a 3 phase motor with a starting capacitor and a timing relay to start the converter.There are many ways to make a converter start.I have my own design that has proven itself to be completely hassle free and bullet proof.I will try to post it later.In the mean time allow me to give a little advice.Just starting the converter is only the first step.To supply true 3 phase to a motor,you should,"balance the load".After the starting circuit opens,you have one leg that is open.Try this....add a running capacitor from each of the powered legs to the open leg.This will make your output from the converter,true 3 phase.Keep adding capacitors and checking the amps on all 3 legs until they are close to equal.As for starting....here are the approximate values for the starting capacitor needed to start your converter.

1hp=150mfd
2hp=250mfd
3hp=450mfd
5hp=650mfd
Hope this helps some of you.
I would highly recommend building your own converter,rather than buying one.It is not rocket science.Used 3 phase motors are dirt cheap.I built one converter from a 7.5 hp 2 pole motor that was destined for the dumpster.The only thing wrong with it was a front bearing that was locked up.It has been running for 5 years without a single glitch.