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KFU 2-/4-
207
16.5.3.1 Limitation of Speed Controller
The output signal of the speed controller is the torque-forming current component Isq.
The output and the I component of the speed controller can be limited via parameters
Current limit
728
,
Current limit generator operation
729
,
Torque limit
730
,
Torque
limit generator operation
731
or
Power limit
739
,
Power limit generator operation
740
. The limits of the proportional component are set via parameter
P component
torque upper limit
732
and parameter
P component torque lower limit
733
.
The output value of the controller is limited by an upper and a lower current limit,
parameter
Current limit
728
and parameter
Current limit generator opera-
tion
729
.
The limit figures are entered in Amperes. The current limits of the con-
troller can be linked to the fixed limits and analog input parameters. The assign-
ment is done via the parameters
Isq limit source motor operation
734
and
Isq
limit source generator operation
735
.
The output value of the controller is limited by an upper and a lower torque limit,
parameter
Torque limit
730
and parameter
Torque limit generator opera-
tion.
731.
The limit values are input as a percentage of the rated motor torque.
The assignment of fixed values or analog limit values is done via the parameters
Torque limit source, motor op.
736
and
Torque limit source, generator op.
737
.
The output value of the P component is limited with parameter
P comp. torque
upper limit
732
and
P comp. torque lower limit
733
. The limit values are input as
torque limits as a percentage of the rated motor torque.
The power output by the motor is proportional to the product of speed and torque.
This output power can be limited at the controller output with
Power limit
739
and
Power limit generator operation.
740
. The power limits are entered in kW.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
728 I limit
0.0 A
ü
I
FUN
ü
I
FUN
729 Current limit generator operation
-0.1 A
ü
I
FUN
ü
I
FUN
730 Torque limit
0.00 %
650.00 %
650.00 %
731 Torque limit generator operation
0.00 %
650.00 %
650.00 %
732 P comp. torque upper limit
0.00 %
650.00 %
100.00 %
733 P comp. torque lower limit
0.00 %
650.00 %
100.00 %
739 Power Limit
0.00 kW
2
ü
P
FUN
2
ü
P
FUN
740 Power limit generator operation
0.00 kW
2
ü
P
FUN
2
ü
P
FUN
motor
motor
generator
generator
Torque Limit
730
Torque Limit
730
Torque Limit Generator
Operation
731
Torque Limit Generator
Operation
731
M
n
Anticlockwise
operation
Clockwise
operation
Speed is limited by
Maximum Frequency
419