Can you or someone else please expand on that? Most VFD that I am familiar with operate between 10khz and 20khz. I personally like to configure them upwards of 16khz because I find the squealing noise annoying. I suppose that the main reason to not do that is that it increases switching losses.
Do any servos or VFD systems actually run their base frequency higher than 20khz? If not, where do those harmonics come from? > On Aug 4, 2020, at 11:51 AM, Jon Elson <el...@pico-systems.com> wrote: > > On 08/04/2020 08:00 AM, Matthew Herd wrote: >> >> I am guessing that the source of the trouble is probably the VFD, as 80kHz >> seems like a plausible base frequency for driving an AC motor. Only the USC >> should be operating at a frequency higher than 60Hz other than the VFD. The >> machine uses three gecko drives and large steppers, so it’s not very >> sophisticated. > I think 80 KHz is a multiple of the frequency of the Gecko drives. You might > try turning off the power to them and see if the issue changes. > > > Jon > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
