User Manual

Efficiency optimization, method 2
Generally, energy efficiency optimization method 2 achieves a better efficiency than method 1.
We recommend that you set method 2.
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Figure 6-62 Determining the optimum flux from the motor thermal model
Based on its thermal motor model, the inverter continually determines - for the actual operating
point of the motor - the interdependency between efficiency and flux. The inverter then sets
the flux to achieve the optimum efficiency.
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Figure 6-63 Qualitative result of efficiency optimization, method 2
Depending on the motor operating point, the inverter either decreases or increases the flux in
partial load operation of the motor.
Efficiency optimization, method 1
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Figure 6-64 Reduce the flux setpoint in the partial load range of the motor
Advanced commissioning
6.35 Efficiency optimization
Converter with the CU230P-2 Control Units
360 Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257946B AF