KEB COMBIVERT F5 BASIC Applications Manual page 55

CP - Parameter
Ramp adjustment with S-curves
+f [Hz]
t1 t1
t2
-f [Hz]
Boost
Rated frequency
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All Rights reserved
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
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.
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:
Name: Basis
KEB COMBIVERT F5-G / B
Operation
t1 = S-curve time (CP.14)
t2 = Acceleration time (CP.12)
t3 = Deceleration time (CP.13)
t2
t1 t1
0,0...25,5 %
0...400 Hz
0,0125 Hz
Date
04.12.01
t3
t1 t1
U
A
0,1 %
2,0 %
CP. 15
CP. 16
U
A
100%
50 Hz
CP. 16
Chapter Section Page
4 3
t [s]
4
f
f
9
9