It is hard to beat a properly sized linear power supply for reliability. The cost difference compared to a switcher is not that great. However, I've used both.
For big switchers, I have bought several from this company: http://www.powersupplyemporium.com/ It is not obvious from their website but they sell thousands of different power supplies. They really make you look to find the products. For instance: http://www.powergatellc.com/enclosed-with-fan-power-supplies.html I've purchased a few Meanwell 1500-2000 watt power supplies to power stepper drives on specialty machines and they worked fine. I would have used a big linear but I didn't have the space. I was able to stack up three of these power supplies and fasten them to the cabinet backplane to minimize space. The Meanwell power supplies are Chinese made. I first saw them being used by a high end OEM near me a few years ago, and I have never had any problems with them. This same place also sells DC-DC converters at the lowest prices I have found. They also sell Din rail mount power supplies for significantly less than Automation Direct. Dave On 11/20/2012 4:00 PM, Bruce Layne wrote: > On 11/20/2012 03:44 PM, Bruce Layne wrote: > > >> If you want to eliminate the high frequency noise from a switching power >> supply, you could use ferrite beads on the output of the switching power >> supply, or wrap that output wire several times around a ferrite toroid >> core to act as an RF choke. >> > I should clarify that. If you add an RF choke on the output of a > switching power supply to reduce the high frequency noise, you'll > probably reduce the high frequency response needed for high inrush > current to a motor. The RF choke by itself will clean up the noise in > applications where you need a cleaner DC power supply, although a linear > power supply will probably be a better option, and for audio > applications a linear supply with a toroidal transformer would be best. > > If you wanted to reduce the switching noise and still have a fast > current response to drive motors, put the RF choke on the output of the > switching power supply, and have that feed large electrolytic capacitors > to provide the instantaneous surge current to the motors. > > Or, just buy a nice big linear power supply. :-) > > > > ------------------------------------------------------------------------------ > 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 > > ------------------------------------------------------------------------------ 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
