KEB COMBIVERT F5 Series Instruction Manual page 17

Parameter description
CP.15 Boost
Co-domain
0.0...25.5 %
CP.16 Rated frequency
Co-domain
0.00...400.00 Hz
*) dependend of the power circuit
Setting Description
2 %* In the lower speed range a large part of the motor voltage decreases on the
stator resistance. To keep the breakdown torque nearly constant over the
entire speed range, the voltage decrease can be compensated by the boost.
Adjustment:
• Determine the rate of utilization in no-load operation
• Preset about 10 Hz and adjust the boost, so that the same rate of utilization
is reached as with the rated frequency.
When the motor, during continuous operation, drives with low speed and too high voltage
it can lead to an overheating of the motor.
Setting Description
50 Hz With the adjusted frequency the inverter reaches in controlled operation a
maximal output voltage. The adjustment of the rated motor frequency is typical
in this case.
Motors can overheat when the rated frequency is
incorrectly adjusted.
U
A
CP.15
f
CP.16
GB - 17