Oscillograms - KEB COMBILINE Manual

4. Oscillograms

Voltage and current at the mains
Without smoothing reactor high current peaks occur by no-limit loading of the DC link capacitors. Thus the increased disturbances of the
DC link voltage continue to the motor by manner of torque fluctuations.
Voltage and current with mains choke uk = 4%
With inductance (mains choke) the amplitudes of the currents are reduced due to the smoothing. The DC link voltage is smoother and thus
the lifetime of the capacitors is extended.
GB - 12
Voltage
Current
Voltage
Current