LM25 Field Weakening Speed
This parameter provides a better adjustment of the field weakening torque curve. Under
certain situations, if the input voltage is sagging too low or the motor has very high slip, it
is possible that the voltage limit might be reached. This can be confirmed by monitoring
the modulation grade on the corresponding diagnostic screen or in parameter DG10
Modulation Grade. If the modulation grade reaches 100% or more the drive is operating
at the voltage limit and potentially can cause poor control of the motor.
To prevent this from occurring the drive has an adjustable torque curve which prevents
the voltage limit from being reached. The value of this parameter is normally calculated
when the motor data is loaded in the LM parameters. After entering the data, this value
can be fine-tuned.
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