2 optimize v/ f-characteristic control, Optimize v/f-characteristic control, Commissioning – Lenze 8240 frequency inverters User Manual
Page 41: 2 optimize v/f-characteristic control, Codes required
Commissioning
UOOu_^MTMO
5-9
L
5.4.2.2
Optimize V/f-characteristic control
Codes required
Code
Name
Possible settings
IMPORTANT
Lenze
Selection
Info
C015 V/f-rated frequency
50.0
7.5
{0.1Hz}
960.0
C016 V
min
setting
0
0
{1 %}
40
C021 Slip compensation
0
0
{1 %}
20
Setting sequence
1.If necessary, select V/f
characteristic (C014).
2.Select V/f-rated frequency
(C015).
D
The V/f-rated frequency determines the slope of the V/f characteristic and has considerable
influence on the current, torque and power performance of the motor.
D
An internal mains voltage compensation compensates deviations in the mains during operation.
They therefore do not have to be considered for the setting of C015.
Adjustment
Calculate the frequency to be set under C015
`MNR xeòz =
QMMs
r
к~нЙЗ гзнзк
xsz ⋅
o~нЙЗ гзнзк СкЙимЙеЕу xeòz
C014 = -2-
Linear characteristic
C014 = -3-
Square-law characteristic (e. g. for pumps, fans)
V
out
V
ratedmotor
1
V
min
0
0
1
C015
f
dratedmotor
V
min
0
0
1
V
out
V
ratedmotor
C015
f
dratedmotor
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