Siemens SINAMICS G115D

• Line impedance
• Actual motor torque
The maximum possible output voltage as a function of the input voltage is provided in the
technical data.
Technical data (Page411)
7.20.2.2 Selecting the U/f characteristic
Table 7-8 Linear and parabolic characteristics
Requirement Application examples Remark Character‐
istic
Parameter
The required tor‐
que is independent
of the speed
Conveyor belts, roller
conveyors, chain con‐
veyors, eccentric worm
pumps, compressors,
extruders, centrifuges,
agitators, mixers
- Linear p1300 = 0
The converter equalizes the voltage drops across
the stator resistance. Recommended for motors
less than 7.5 kW.
Precondition: You have set the motor data accord‐
ing to the rating plate and have performed the
motor identi󹪝cation after quick commissioning.
Linear with
Flux Cur‐
rent Con‐
trol (FCC)
p1300 = 1
The required tor‐
que increases with
the speed
Centrifugal pumps, ra‐
dial fans, axial fans
Lower losses in the motor and converter than for a
linear characteristic.
Parabolic p1300 = 2
Table 7-9 Characteristics for special applications
Requirement Application examples Remark Character‐
istic
Parameter
Applications with a
low dynamic re‐
sponse and con‐
stant speed
Centrifugal pumps, ra‐
dial fans, axial fans
If the speed setpoint is reached, and remains un‐
changed for 5 seconds, then the converter reduces
its output voltage.
As a consequence, the ECO mode saves energy
with respect to the parabolic characteristic.
ECO mode p1300 = 4
or
p1300 = 7
The converter must
maintain the motor
speed constant for
the longest possi‐
ble time.
Drives in the textile sec‐
tor
When reaching the maximum current limit, the
converter only reduces the output voltage, but not
the frequency.
Precise fre‐
quency
characteris‐
tic
p1300 = 5
or
p1300 = 6
Freely adjustable
U/f characteristic
- - Adjustable
characteris‐
tic
p1300 = 3
U/f characteristic
with independent
voltage setpoint
- The interrelationship between the frequency and
voltage is not calculated in the converter, but is
speci󹪝ed by the user.
Independ‐
ent voltage
setpoint
p1300 = 19
Additional information on U/f characteristics can be found in the parameter list and in the
function diagrams of the List Manual.
Advanced commissioning
7.20Motor control
SINAMICS G115D Wall Mounted distributed drive
286 Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA