User Manual

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.
)OX[
(IILFLHQF\


S 
S 
S 





Figure 6-65 Qualitative result of efficiency optimization, method 1
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 6-53 Efficiency optimization, method 2
Parameter Description Setting
p1401.14 Flux control configuration 1 signal: Efficiency optimization 2 active
Factory setting: 0
p1570 Flux setpoint [%] Factory setting: 100 %
p3315 Efficiency optimization 2 flux
minimum limit value [%]
Minimum limit value for the calculated optimal flux
Factory setting: 50 %
p3316 Efficiency optimization 2 max‐
imum flux limit value [%]
Maximum limit value for the calculated optimal flux
Factory setting: 110 %
Table 6-54 Efficiency optimization, method 1
Parameter Description Setting
p1570 Flux setpoint [%] Factory setting: 100 %
p1580 Efficiency optimization [%] 0 %: Efficiency optimization is deactivated.
100 %: In no-load operation, the inverter reduces the flux setpoint to 50%
of the rated motor flux.
The factory setting depends on the inverter.
Advanced commissioning
6.35 Efficiency optimization
Converter with the CU230P-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257946B AF 361