Moeller DF6-340 Series - Page 113

Setting Parameters
01/02 AWB8230-1413GB
110
Linear U/f characteristic
For a constant torque, enter the value 00 under PNU A044
(default). The DF6 frequency inverter then increases the output
voltage U
2
on a linear ramp up to the base frequency in
PNU A003.
Quadratic U/f characteristic
For a reduced torque, enter the value 01 under PNU A044. The
DF6 frequency inverter then increases the output voltage U
2
on a
linear ramp up to ten percent of the base frequency in PNU A003.
Then, the DF6 increases U
2
on a quadratic ramp (reduced) to the
transition frequency in PNU A003.
Adjustable U/f characteristic
For a freely programmable torque, enter the value 02 under
PNU A044. Under PNU b100 to b113, you can assign seven
different frequency-voltage pairs to the DF6. However, frequencies
f
1
to f
7
must have ascending values: f
1
F f
2
F f
3
F ...F f
7
. The
voltages U
1o
to U
7o
are freely adjustable.
f
7
can have values up to the maximum frequency of the DF6.
U
7o
can be up to the input voltage U
1
or the voltage set under
PNU A082.
If you use the adjustable U/f characteristic, the following
parameters are no longer valid:
• PNU A003: Base frequency
• PNU A004: Maximum end frequency
• PNU A041: Boost characteristics
Figure 106: Linear U/f characteristic
U
2
:Output voltage
f
o
: Output frequency
Figure 107: Quadratic U/f characteristic
U
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 108: Adjustable U/f characteristic
U
2
:Output voltage
f
o
: Output frequency
Figure 109: Limits of the freely adjustable U/f characteristic
U
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
B
1
B
6
B
7
.
.
.
.
. . . . . .
400
7
1
, PNU A082
7
7o
7
6o
7
1o
7
2
B
o
[Hz]
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