Viesturs
2014-11-26 5:06 GMT+02:00 Jon Elson <el...@pico-systems.com>: > > It is probably getting stuck at low speed due to high > current. The larger VFD may > have a lower PWM frequency, which is causing the peak > winding current to exceed > the current limit. it suppresses frequency increase, waiting > for the motor to > "catch up" and current to go down, which never happens. So, > it gets stuck. > Sounds like the inductors may be required. > I checked VFD - it is running in V/F mode. I reduced max current to 3A, attached that fast spindle, tried, but it did not go higher than 8 hz. I did not change any settings, when attached "normal" 0,55 kW motor and it worked just fine. Jon, could you, please, share some link for such kind of inductor? I am looking at website of local seller of electronics stuff, I do not see any inductors with 9A rated current and anything above 22 uH inductivity. Viesturs ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
