Lenze EVF9383 - Manual (Page 191)

Optimising the operating behaviour
Boost correction with V/f characteristic control
6.11
6.11.3
l
6.11−7 EDSVF9383V EN 7.1−04/2012
6 × U
min
3 × U
min
0
0 0.5 0.99
C0080
0
9300vec141
Fig. 6.11−1 Influence of boost correction
0 Maximum height of the correction value when the field
frequency is 0
C0080 = 0.99 Maximum correction value. The voltage boost U
min
achieved by
C0016 is increased sixfold.
C0080 = 0 No correction value. The voltage boost U
min
achieved by C0016 is
not increased, the boost correction is deactivated.
Increase the value in C0080 step by step and observe the effect on the
current injection with an oscilloscope, if required.
– If the boost correction is to high, this can cause current overshoots
when the current injection starts.
5. Set the adaptation of the boost correction in C1583.
100 %
0
0 0.5 f
out
f
out
0
9300vec140
Fig. 6.11−2 Adaptation of boost correction
0 Adaptation of boost correction
Characteristic when C1583 = 100 % (Lenze setting). The output
frequency corresponds to half the rated motor frequency in C0089.
Characteristic when C1583 = 199.99 %. The output frequency
corresponds to the rated motor frequency in C0089.
When C1583 = 0 % the boost correction is deactivated
Enter the output frequency in C1583 until which the boost correction is
to have an effect.
– At an output frequency of 0 Hz the boost correction has the influence
defined in C0080 and is 100 percent efficient. An increasing output
frequency reduces the influence linearly to 0.