Siemens SINAMICS G110M Operating Instructions Manual page 340

Advanced commissioning
8.28 Efficiency optimization
Efficiency optimization, method 2
Generally, energy efficiency optimization method 2 achieves a better efficiency than method 1.
We recommend that you set method 2.
Figure 8-78
Based on its thermal motor model, the converter continually determines - for the actual
operating point of the motor - the interdependency between efficiency and flux. The converter
then sets the flux to achieve the optimum efficiency.
Figure 8-79
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
Figure 8-80
338
Determining the optimum flux from the motor thermal model
Qualitative result of efficiency optimization, method 2
Reduce the flux setpoint in the partial load range of the motor
Distributed converter for SIMOGEAR geared motors
Operating Instructions, 10/2020, FW V4.7 SP13, A5E31298649B AL