Siemens SINAMICS G115D Operating Instructions Manual page 302

Advanced commissioning
6.26 Efficiency optimization
Depending on the motor operating point, the converter either decreases or increases the flux
in partial load operation of the motor.
Efficiency optimization, method 1
The motor operates in partial load mode between no-load operation and the rated motor
torque. Depending on p1580, in the partial load range, the converter reduces the flux
setpoint linearly with the torque.
The reduced flux in the motor partial load range results in higher efficiency.
Parameters
The converter calculates the parameters for the thermal motor model based on the motor
data that has been set and the motor data identification.
Efficiency optimization, method 2
Parameter
p1401.14
p1570[0...n]
p3315[0...n]
p3316[0...n]
Efficiency optimization, method 1
Parameter
p1570[0...n]
p1580[0...n]
300
Description
Flux control configuration
CO: Flux setpoint [%]
Efficiency optimization 2
minimum flux limit value [%]
Efficiency optimization 2
maximum flux limit value
[%]
Description
CO: Flux setpoint [%]
Efficiency optimization [%]
Setting
1 signal: Efficiency optimization 2 active
Factory setting: 0000 0000 0000 0110 bin
Sets the flux setpoint referred to rated motor flux.
Factory setting: 100
Sets the minimal limit value for the calculated optimum flux.
Factory setting: 50
Sets the maximum limit value for the calculated opti-
mum flux.
Factory setting: 110
Setting
Sets the flux setpoint referred to rated motor flux.
Factory setting: 100
0 %: Efficiency optimization is deactivated.
100 %: In no-load operation, the converter reduces the
flux setpoint to 50% of the rated motor flux.
The factory setting depends on the converter.
Operating Instructions, 12/2020, FW V4.7 SP13, A5E48681219B-002
SINAMICS G115D distributed drive