Assuming your using a static phase converter you lost 1/3 of your horsepower. There is three legs/wires on 3 phase. The statics only provide 2 legs of power. I am not sure of the details but I think it provides 3 legs to get it to start? But if that is what you have odds are there is nothing you can do. Assuming everything is working correctly.
The best way to go is with a rotary converter. It actually provides all 3 legs and with a properly sized converter there is no power loss. And the best part is that you can run other 3 phase machines which are typically cheaper than single phase machines. Used machines that is.
Other option is replacing the motor with a single phase motor. But that is almost the same price as you can build a RPC for.
Last edited by Kudzupatch; 01-04-2009 at 08:54 AM.