Hey Gene, I would agree - output filters on a VFD would not be a good idea. I was thinking of Input Line filters to the VFD. If I recall, the VFD can send back noise on the input lines which can be picked up by other stuff, either power supplies, computers, or I/O points and cause issues.
Something like this: https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/vfd_accessories/roxburgh_3-phase_drive-rated_power_line_emi_-z-_rf_filters/kmf306a I could be confusing all this with something else, so take that advice with a grain of salt. Mark On Tue, Dec 29, 2020 at 11:00 PM Gene Heskett <ghesk...@shentel.net> wrote: > > > > They don't like output filters at all, the capacitors in them can quickly > kill the semi's doing the phase switching. Most will have warnings in > their docs to make sure there is nothing between the output and the > motors they are controlling. Inputs seem to be much less of a problem as > I have a 250 volt Corcom that is a brick wall above 30 mhz in ones > input, and had a home made gizmo of about those specs in the input to > another for years. > > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
