F - Characteristic - BONFIGLIOLI Act 201 Operating Instructions Manual

15
The sensor-less control in configurations 110 and 111 is based on the proportional
change of output voltage compared to the output frequency according to the config-
ured characteristic.
By setting the V/f-characteristic, the voltage of the connected 3-phase motor is con-
trolled according to the frequency. The torque to be applied by the motor at the cor-
responding operating point demands the control of the output voltage proportional to
the frequency. At a constant output voltage / output frequency ratio of the frequency
inverter, the magnetization is constant in the nominal operating range of the 3-phase
motor. The rating point of the motor or end point of the V/f-characteristic is set via
the guided commissioning with the parameter
ter
The lower frequency range, where an increased voltage is necessary for the start of
the drive, is critical. The voltage at output frequency = zero is set with the parameter
Starting Voltage
V/f-characteristic can be defined by the parameters
quency
characteristic. Via the parameters
419, the working range of the machine or the V/f-characteristic is defined.
(FMIN):
(US):
(UK):
(UC):
No.
600 Starting Voltage
601 Voltage Rise
602 Rise Frequency
603 Cut-Off Voltage
604 Cut-Off Frequency
Note:
156
156
V/f - Characteristic
Cut-Off Frequency
604.
600. An increase in voltage deviating from the linear course of the
602. The percentage parameter figure is calculated from the linear V/f-
U
603 (UC)
601 (UK)
600 (US)
Minimum Frequency
Starting Voltage
600
Voltage Rise
(FK):
601
,
Cut-Fff Voltage
603
,
Parameter
Description
The guided commissioning takes the parameterized rated motor values
and reference data of the frequency inverter into account when it comes
to pre-setting the V/f-characteristic. In the case of three-phase ma-
chines, the speed can be increased at a constant torque if the motor
winding can be switched over from star to delta connection. If the data
for delta connection indicated on the name plate of the three-phase
motor were entered, the cut-off frequency is increased automatically by
the square root of three.
Operating Instructions ACTIVE
Operating Instructions ACTIVE
Cut-Off Voltage
Minimum Frequency
418 (FMIN)
Working range
604 (FC)
602 (FK)
Maximum Frequency
(FMAX):
418
,
,
Rise Frequency
602,
Cut-Off Frequency
(FC):
Min.
0.0 V
-100 %
0 %
60.0 V
0.00 Hz
603 and the parame-
Voltage Rise
601 and
Maximum Frequency
418 and
419 (FMAX)
f
419,
604
Settings
Max. Fact. sett.
100.0 V
200 %
100 %
560.0 V 400.0 V
999.99 Hz 50.00 Hz
Rise Fre-
5.0 V
10 %
20 %
06/07
06/07