Table 6-47 Linear and parabolic characteristics
Requirement Application examples Remark Characteristic Parameter
The required tor‐
que is independ‐
ent of the speed
Eccentric-worm pump,
compressor
- Linear p1300 = 0
The inverter equalizes the voltage drops
across the stator resistance. Recommen‐
ded for motors less than 7.5 kW.
Precondition: You have set the motor data
according to the rating plate and have per‐
formed the motor identification after the ba‐
sic commissioning.
Linear with Flux
Current Control
(FCC)
p1300 = 1
The required tor‐
que increases with
the speed
Centrifugal pumps, radi‐
al fans, axial fans, com‐
pressors
Lower losses in the motor and inverter than
for a linear characteristic.
Parabolic p1300 = 2
Table 6-48 Characteristics for special applications
Requirement Application examples Remark Characteristic Parameter
Applications with a
low dynamic re‐
sponse and con‐
stant speed
Centrifugal pumps, radi‐
al fans, axial fans
The ECO mode results in additional energy
saving when compared to the parabolic
characteristic.
If the speed setpoint is reached and re‐
mains unchanged for 5 seconds, the inver‐
ter again reduces its output voltage.
ECO mode p1300 = 4
(linear char‐
acteristic
ECO)
or
p1300 = 7
(parabolic
characteris‐
tic ECO)
Additional information on V/f characteristics can be found in the parameter list and in the
function diagrams 6300 ff of the List Manual.
Characteristics after selecting the application class Standard Drive Control
Selecting application class Standard Drive Control reduces the number of characteristics and
the setting options:
● A linear and a parabolic characteristic are available.
● Selecting a technological application defines the characteristic.
● The following cannot be set - ECO mode, FCC, the programmable characteristic and a
specific voltage setpoint.
Advanced commissioning
6.24 Motor control
Converter with the CU230P-2 Control Units
300 Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE
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