Moeller DV6-340 Series - Quadratic V;f characteristic; Adjustable V;f characteristic

01/02 AWB8230-1415GB
Voltage/frequency charac-
teristic and voltage boost
127
Quadratic V/f characteristic
For a reduced torque, enter the value 01 under PNU A044. The
DV6 frequency inverter then increases the output voltage V
2
on
a linear ramp up to ten percent of the base frequency in
PNU A003. Then, the DV6 increases V
2
on a quadratic ramp
(reduced) to the transition frequency in PNU A003.
Adjustable V/f characteristic
For a freely programmable torque, enter the value 02 under
PNU A044. Under PNU b100 to b113, you can assign seven diffe-
rent frequency-voltage pairs to the DV6. However, the frequencies
f
1
to f
7
must have increasing values for this: f
1
F f
2
F f
3
F ...
F f
7
. The voltages V
1o
to V
7o
are freely adjustable.
f
7
can be up to the maximum frequency of the DV6. V
7o
can be
up to the input voltage V
1
or the voltages set under PNU A082.
If you use the adjustable V/f characteristic, the following para-
meters are no longer valid:
• PNU A003: Base frequency
• PNU A004: End frequency
• PNU A041: Voltage boost characteristic
Figure 124: Linear V/f characteristic
V
2
:Output voltage
f
O
: Output frequency
Figure 125: Quadratic V/f characteristic
V
2
:Output voltage
f
O
: Output frequency
PNU A003 PNU A004
100
[%]
U
2
f
o
PNU A0030.1 x PNU A003 PNU A004
100
[%]
U
2
f
o
Figure 126: Adjustable V/f characteristic
V
2
:Output voltage
f
O
: Output frequency
Figure 127: Limits of the freely adjustable V/f characteristic
V
2
:Output voltage
f
O
: Output frequency
PNU b113 U
7o
PNU b111 U
6o
PNU b109 U
5o
PNU b107 U
4o
PNU b101 U
1o
PNU b103 U
2o
PNU b105 U
3o
f
1
f
2
f
3
f
4
f
5
f
6
f
7
PNU b100 b102 b104 b106 b108 b110 b112
U
2
f
o
f
1
f
6
f
7
.
.
.
.
. . . . . .
400
U
1
, PNU A082
U
7o
U
6o
U
1o
U
2
f
o
[Hz]
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