Originally Posted by Stubbie
No possible way to rewire a 3 phase motor motor to single phase. I've been told there is a rotary phase converter that is sometimes capable of letting a 3 phase motor run on single phase but I'm not sure of the details.
I am no expert on phase converters but I have had some experience with them. We needed to get a 3 phase table saw running last winter so we built our own rotary phase converter. To do this you need to first buy a static phase converter. The one we bought was capable of starting up to I think a 7 hp 3 phase motor. Once started the phase converter can be turned off and the motor will run by itself. But the problem with this is the motor is only running on 2 legs, producing only 2/3 of its rated hp. This was not going to work with our tablesaw. We got a 5 hp 3 phase motor running on two legs of power and used the third leg coming off the motor to generate power. With the help of the static converter we were able to get a second motor (10hp) wired in line and started. With these two motors alone we could turn off the static converter and had two motors running on 2 legs. With these two motors we could generate enough power on their third legs to run a third 3 phase motor (10hp) at full power. We ended up drawing off of all three motors in order to get full power out of our saw. We bought our motors at salvage yards and had some laying around. So it was cheaper for us to do it this way. You need to make sure your service is big enough for this. We were dimming lights on the whole farm starting up. Also make sure you talk to your electrician, or better yet have him do it since he's licensed. Your dealing with high voltage (240) so be careful!