I guess a common mode filter will be good but I have almost only theoretical knowledge and very limited experience.
Nicklas Karlsson On Thu, 14 May 2015 10:38:43 -0400 Rick Lair <r...@superiorroll.com> wrote: > I have been following this thread somewhat, and have a question, > > What is the difference between a line reactor and emi input filter? > > We have a AD GS3 40hp drive in our turning center, and have the same > noise problems with the drive, and I am not sure which one to buy, or do > I need both? The drive schematic shows putting an emi filter on both > sides of the drive, would that help as well? At $272 bucks a piece, I > don't want to throw money away, but I do want to get this put to bed, we > have been dealing with it for 2 years now, and I am getting tired of it. > > Thanks > > Rick > > On 5/14/2015 9:53 AM, Dave Cole wrote: > >>> The Rasmi input filter > > Take it off and see what happens.... > > > > If that drive is screwing with your keyboard that is on the OUTSIDE of your > > control cabinet, imagine what kind of RF exposure is on the inside of your > > control cabinet! > > > > Those AD VFDs should also be sold as EMI test generators. ;-) > > > > Dave > > > > > > > > On 5/14/2015 8:53 AM, Tom Easterday wrote: > >> I spent some time with the spectrum analyzer but did’t have much luck in > >> isolating the sink for the noise. I just verified that my VFD does indeed > >> produce a large amount of noise between low kHz and about 10MHz! I did > >> some re-routing of wires and replaced some that weren’t shielded. I > >> ordered some ferrites for the VFD-motor wiring and my computer I/O > >> extension cabling which will be here in a couple days. > >> > >> However, I did find the source of the main problem! It was indeed my > >> keyboard. Not the USB wiring from keyboard to pc, but the keyboard ITSELF > >> is very sensitive to the noise created by the VFD. If I move the keyboard > >> to the very extreme end of it’s (rather long) usb cable the problem > >> disappears completely. 6” closer to the cabinet and noise reappears. > >> Apparently the noise is being interpreted as key presses by the keyboard > >> circuitry. I replaced the new water resistant Logitech keyboard with a > >> very old Apple keyboard I had lying around and no more random characters! > >> I also had a second problem where the VFD would shut down somewhat > >> randomly which I thought was related to this noise as well. That turned > >> out to be an over current condition at very low rpm. Tweaking some > >> settings fixed that. > >> > >> The Rasmi input filter, and various re-wiring and shielding I did was > >> probably not needed, but in the long run perhaps it will save me from > >> other problems. > >> > >> Thanks, for all the input, > >> -Tom > >> > >> > >> ------------------------------------------------------------------------------ > >> One dashboard for servers and applications across Physical-Virtual-Cloud > >> Widest out-of-the-box monitoring support with 50+ applications > >> Performance metrics, stats and reports that give you Actionable Insights > >> Deep dive visibility with transaction tracing using APM Insight. > >> http://ad.doubleclick.net/ddm/clk/290420510;117567292;y > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > > --- > > This email has been checked for viruses by Avast antivirus software. > > http://www.avast.com > > > > > > ------------------------------------------------------------------------------ > > One dashboard for servers and applications across Physical-Virtual-Cloud > > Widest out-of-the-box monitoring support with 50+ applications > > Performance metrics, stats and reports that give you Actionable Insights > > Deep dive visibility with transaction tracing using APM Insight. > > http://ad.doubleclick.net/ddm/clk/290420510;117567292;y > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > -- > > Thanks > > > Rick Lair > Superior Roll & Turning LLC > 399 East Center Street > Petersburg MI, 49270 > PH: 734-279-1831 > FAX: 734-279-1166 > www.superiorroll.com > > > ------------------------------------------------------------------------------ > One dashboard for servers and applications across Physical-Virtual-Cloud > Widest out-of-the-box monitoring support with 50+ applications > Performance metrics, stats and reports that give you Actionable Insights > Deep dive visibility with transaction tracing using APM Insight. > http://ad.doubleclick.net/ddm/clk/290420510;117567292;y > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
