Siemens SINAMICS G120 - Page 350

Efficiency optimization, method 1
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Figure 6-60 Reduce the flux setpoint in the partial load range of the motor
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.
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Figure 6-61 Qualitative result of efficiency optimization, method 1
The reduced flux in the motor partial load range results in higher efficiency.
Parameter Description
p1570 Flux setpoint (factory setting: 100%)
p1580 Efficiency optimization (factory setting depends on the inverter)
0% Efficiency optimization is deactivated.
100% In no-load operation, the inverter reduces the flux setpoint to 50% of the rated
motor flux.
Advanced commissioning
6.35 Efficiency optimization
Converter with the CU230P-2 Control Units
350 Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE