On Wednesday 30 December 2020 01:24:50 Mark Johnsen wrote: > Dave - I bought the GS VFD from Automation Direct a few years back. > It works well, but is pretty noisy. I bought a line filter, but > haven't installed it, but probably not a bad idea. > > From what I learned from installing the GS, I would consider some line > filtering if you bought a chinese VFD. I want to say there was a > thread on this mailing list quite a while ago regarding it, but I > don't recall now. If you get a chance, search the mailing list or > LInuxCNC forum. > 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.
But that 1.5kw 110 volt has been swapped for a 2.2kw 220 single phase with no filters just in the last week, used up the cheap bearings in the 110 volt motor. > Mark Cheers, Gene Heskett, CET -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
