KEB COMBIVERT F5 Serie Manual De Instrucciones página 86

Operation of the Unit
Ramp adjustment with S-curves
+f [Hz]
GB
t1
t2
GB
-f [Hz]
Boost
Rated frequency
GB- 16
t1 t1
t3
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 with
the boost.
Adjustment range:
Resolution:
Factory setting:
Adjustment: • Determine the rate of utilzation in no-load operation
When the motor, during continuous operation, drives with low
speed and too high voltage it can lead to an overheating of the
motor.
With the adjusted frequency the inverter reaches a maximal output
voltage. The adjustment of the rated motor frequency is typical in this
case. Note: Motors can overheat when the rated frequency is
incorrectly adjusted!
Adjustment range:
Resolution:
Factory setting:
t2
t1 t1
t1
with rated frequency
• Preset about 10 Hz and adjust the boost, so that about the
same rate of utilization is reached as with the rated
frequency.
t1 = S-curve time (CP.14)
t2 = Acceleration time (CP.12)
t3 = Deceleration time (CP.13)
t3
t1
U
A
0,0...25,5 %
0,1 %
2,0 %
CP. 15
U
A
0...400 Hz
100%
0,0125 Hz
50 Hz
t1
t [s]
f
CP. 16
f
CP. 16