Application Manual CDA3000
6-5
6 Control modes
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General points on the interaction between control methods and
motors
If control methods such as SFC and FOR are used for speed control, the
correct motor data are decisive factors in terms of the quality of the meth-
ods.
During auto-tuning of the inverter module, all controllers are optimally set
up based on the rating plate data and the automatically calculated electri-
cal motor parameters.
If the motor data from the rating plate do not exactly match the actual
electrical data of the motor, the control quality decreases. If the nominal
speed nn is imprecisely specified, for example, the number of pole pairs
may be incorrectly calculated or an unfavourable motor flux may be set.
All further controller settings will then also be incorrect.
As already outlined, this will negatively affect the dimensioning and opti-
mization of the controllers.
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