Hi Andy. Did you fit the proper values for the paramters Group 1 and 2 ? This VFD seem to have no selftuning procedure isn't it ? In any case I do believe that the VFD is maybe too small for the motor you're running (old type). Have you tried to measure the motor current value drived without the VFD ? In the VFD parameters you can setup the maximum current on the motor and the VFD should protect itself from an overload (or it should do).
Regards On Thu, Jan 7, 2016 at 3:32 PM, Dave Caroline <dave.thearchiv...@gmail.com> wrote: > My old Adcock and Shipley mill motor has some of those larger horses, > two dead VFDs so far. > > Dave Caroline > > On 07/01/2016, andy pugh <bodge...@gmail.com> wrote: > > My lathe has a 3HP motor driven by a 3hp VFD. > > There is also a Kopp Variator variable speed drive, and a 2-speed > > gearbox with electromagnetic clutches. > > > > Running at 50Hz it thus has two speeds, 10-500rpm and 80-3000 rpm. > > > > The VFD works fine in the lower range, but in the higher speed range, > > unless the variator is wound down to a low speed, the VFD current > > reaches 18A and the VFD trips out. > > > > I am wondering if the 1968 3hp motor was made of bigger horses than > > the 2015 3hp VFD. > > > > I further wonder if I can change the V/F curve to keep the motor > > current inside the limits of the VFD. Does that seem reasonable, or > > will the motor simply run slower, make less back-emf and sink even > > more current? > > > > This might be a link to the manual > > http://www.lovatoelectric.com/HandlerDoc.ashx?s=I365GB12_12.pdf&ic=119 > > > > -- > > atp > > If you can't fix it, you don't own it. > > http://www.ifixit.com/Manifesto > > > > > ------------------------------------------------------------------------------ > > _______________________________________________ > > 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 > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
