How many kW are you looking for? Greg
----- Original Message ----- From: "Przemek Klosowski" <przemek.klosow...@gmail.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Wednesday, November 21, 2012 12:28 AM Subject: [Emc-users] VFD input > Not strictly EMC but I am sure people here will know the answer. We all > know that a 3-phase VFD can often be used off one-phase. Since all the > current is then pulled off the one leg of the input rectifier, the > standard > wisdom says that you derate the VFD power in this situation by a factor of > 2 or so. > > It occurred to me that since the input circuit should be just a 3-phase > rectifier, it should work to connect all three input terminals together, > and feed that from the single phase. > > Would it work on the VFDs you're familiar with? > > I can see that, while equalizing the load across the rectifiers, this > scheme doesn't help with power variation within the 50/60Hz cycle, so some > derating is still called for, I think. > ------------------------------------------------------------------------------ > Monitor your physical, virtual and cloud infrastructure from a single > web console. Get in-depth insight into apps, servers, databases, vmware, > SAP, cloud infrastructure, etc. Download 30-day Free Trial. > Pricing starts from $795 for 25 servers or applications! > http://p.sf.net/sfu/zoho_dev2dev_nov > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.455 / Virus Database: 271.1.1/5400 - Release Date: 11/16/12 20:39:00 ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
