Controllers
Parameter manual b maXX BM3000
Document no.: 5.12001.07 Baumüller Nürnberg GmbH
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of 820
4.7
18.36 w3-Feedforward factor acceleration
Factor for acceleration feedforward during the acceleration phase.
A value of 1 corresponds to 100%.
18.37 w3-Feedforward factor brake
Factor for acceleration feedforward during the braking phase; a value of 1 corresponds to
100%.
Friction assists during braking, so a reduced feedforward during braking can make sense.
18.38 w3-Feedforward act. factor
The currently effective w3 factor for acceleration feedforward is displayed here.
18.39 w3-Feedforward time constant
Time constant of the acceleration feedforward for the speed controlled operating modes.
The w3-feedforward is implemented as DT1 element. All changes to the speed set value
are differentiated with respect to time, smoothed with the time constant >18.39< and mul
-
tiplied subsequently with Z18.38– w3-Feedforward actual factor.
The smoothing via >18.39< does not affect at position controlled operating modes. Here
an already smoothed acceleration set value is available, whose smoothing occurs via pa
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rameter Z18.70– w2-Feedforward time constant.
18.40 Ks scaling factor
The entered value must comply with the "system gain" at the measuring point (magnetic
flux = 100% and motor "warm").
The Ks factor >18.40< provides the basis of the parameter "Ks actual value" Z155.10–,
at which a deviating operation from the measure point must be considered.
The inverse value of the "Ks actual value" Z155.10– (1/Ks) serves in the controller as
standardization constant between the acceleration set value (speed controller output)
and the torque current set value (isq).
See ZThe factor Ks– on page 446 and ZKs Determination– on page 207.
18.42 Center frequency x2 act value notch filter
Center frequency of the speed actual value notch filter in Hz.
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