Siemens SIMATIC ET 200pro FC-2 Operating Instructions Manual page 187

Efficiency optimization, method 1
Figure 7-42
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 inverter reduces the flux setpoint
linearly with the torque.
Figure 7-43
The reduced flux in the motor partial load range results in higher efficiency.
Parameter
The inverter calculates the parameters for the thermal motor model based on the motor data
that has been set – and the motor data identification.
Table 7- 33 Efficiency optimization, method 2
Parameter Description
p1401.14 Flux control configuration
p1570 Flux setpoint [%]
p3315 Efficiency optimization 2 flux
minimum limit value [%]
p3316 Efficiency optimization 2
maximum flux limit value [%]
SIMATIC ET 200pro FC-2 converter
Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257324B AF
Reduce the flux setpoint in the partial load range of the motor
Qualitative result of efficiency optimization, method 1
Setting
1 signal: Efficiency optimization 2 active
Factory setting: 0
Factory setting: 100 %
Minimum limit value for the calculated optimal flux
Factory setting: 50 %
Maximum limit value for the calculated optimal flux
Factory setting: 110 %
Advanced commissioning
7.18 Efficiency optimization
185