> ... > So, I reset the VFD to factory settings, and tried running from the > operator panel. Lo and behold it all worked fine, and at 100Hz I get > the full 3000rpm spindle speed that the lathe is rated for. > Oddly, the display at 50Hz / 1440 rpm _still_ only says 3.5A.
There is a very strong correlation between current and load/torque. > ... > I am also very baffled why the same motor would trip out a 3hp VFD at > 12A and 1500 rpm but run at 3000 rpm at 3.5A with a 4hp VFD. Probably because of wrong parameters. Flux weakening by lowering voltage is possible, to move in the opposite direction by applying full voltage at lower than rated speed is possible but is probably not a very good idea. Nicklas Karlsson ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785471&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
