Siemens SINAMICS G120C DP

E󹪟ciency optimization, method 2
Generally, energy e󹪟ciency optimization method2 achieves a better e󹪟ciency than
method1.
We recommend that you set method2.
,QYHUWHU
7KHUPDOPRWRU
PRGHO
(IILFLHQF\
GHSHQGHQWRQWKH
IOX[
2SWLPXPIOX[
Figure8-76 Determining the optimum 󹪞ux from the motor thermal model
Based on its thermal motor model, the converter continually determines - for the actual
operating point of the motor - the interdependency between e󹪟ciency and 󹪞ux. The
converter then sets the 󹪞ux to achieve the optimum e󹪟ciency.
)OX[
(IILFLHQF\
)OX[
(IILFLHQF\
(IILFLHQF\RSWLPL]DWLRQLVQRWDFWLYH
(IILFLHQF\RSWLPL]DWLRQLVDFWLYH







Figure8-77 Qualitative result of e󹪟ciency optimization, method 2
Depending on the motor operating point, the converter either decreases or increases the 󹪞ux
in partial load operation of the motor.
E󹪟ciency optimization, method 1
)OX[VHWSRLQW
7RUTXH1RORDG
RSHUDWLRQ
5DWHGWRUTXH
3DUWLDOORDGRSHUDWLRQ
Sy
Sy
S
S 
S 
S 






Figure8-78 Reduce the 󹪞ux setpoint in the partial load range of the motor
Advanced commissioning
8.31E󹪟ciency optimization
SINAMICS G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK 353