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
