On Tue, Apr 30, 2013, at 01:37 PM, Dave wrote: > You will have $3-400 into a 10 hp phase converter in no time. (I have > put a few together). If you need three phase for other things.. go the > phase converter route and see how that works. > > If you are going to run the lathe a lot, I would look for a relatively > new Industrial DC drive that is compatible with your motor. Not the > little guys, but the industrial variety.. They are normally rated in > amps of armature current. > > They still make them. Siemens has some really nice DC drives. I setup > a number of them for a plant that uses them to draw copper wire. They > were 25-75hp. > > I bet you can run most of them off single phase. It should not be > difficult to fool the drive into thinking that it has all three phases - > use a power capacitor to connect non-connected phase etc.
Actually it is much harder to run a DC drive on single phase. Most industrial DC drives that I'm familiar with use phase controlled SCRs to run the motor. They simply will not run on single phase, no way, no how. And they won't run on fake three-phase coming from a static phase converter (capacitors only). They might run on three phase from a rotary converter, but I wouldn't hold my breath. > > Just derate the drive. If you need a real 10 hp, look for a drive that > can handle a 15 hp DC motor. The better drives have overtemp alarms and > auto shutdown so burning one up should be difficult. > > If you keep looking your should be able to find something for less than > $750. > > There are a lot of DC drives on Ebay. > > Dave > -- John Kasunich [email protected] ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
