Siemens SINAMICS G120 Operating Instructions Manual page 222

Advanced commissioning
6.5 Motor control
Table 6- 31 Linear and parabolic characteristics
Requirement Application examples
The required Eccentric-worm pump,
torque is inde- compressor
pendent of the
speed
The required Centrifugal pumps,
torque increases radial fans, axial fans,
with the speed compressors
Table 6- 32 Characteristics for special applications
Requirement Application examples
Applications with a Centrifugal pumps,
low dynamic re- radial fans, axial fans
sponse and con-
stant speed
Additional information on V/f characteristics can be found in the parameter list and in the
function diagrams 6300 ff of the List Manual.
222
Remark
-
The inverter equalizes the voltage drops
across the stator resistance. Recom-
mended for motors less than 7.5 kW.
Precondition: You have set the motor data
according to the rating plate and have
performed the motor identification after
the basic commissioning.
Lower losses in the motor and inverter
than for a linear characteristic.
Remark
The ECO mode results in additional ener-
gy saving when compared to the parabolic
characteristic.
If the speed setpoint is reached and re-
mains unchanged for 5 seconds, the in-
verter again reduces its output voltage.
Operating Instructions, 04/2015, FW V4.7 SP3, A5E34257946B AB
Characteristic Parameter
Linear p1300 = 0
Linear with Flux p1300 = 1
Current Control
(FCC)
Parabolic p1300 = 2
Characteristic Parameter
ECO mode p1300 = 4
(linear char-
acteristic
ECO)
or
p1300 = 7
(parabolic
characteristic
ECO)
Converter with CU230P-2 Control Units