Measurement / model currents
6.2.7.1 Control to model currents
At operation with model (cs00 bit 0...3 = 2 or 3) a motor model calculates the model
currents from the voltages and motor parameters.
It is adjusted with bit 6 of ds04current mode that the current controller uses the es-
timated (instead measured) model currents as controller feedback.
This is useful e.g. at HF spindles, where the current measurement is falsified by
high current ripple of the motor current, or due to saturation effects high-frequency
harmonics are contained in the current which can activate the controller.
Control to measuring currents
Control to model currents
This model currents are adjusted for the current controller via timing relay ds08de-
viation control time to the measured current in order to prevent a long-term diver-
gence of measuring and model current.
Pt1-time for tracking the model current
This time can usually remain unchanged.
6.2.7.2 Observer
An observer can be activated with bit 7 of ds04 current mode. This can improve the
model accuracy at high output frequencies.
Observer for model currents on / off
Defines the influence of the observer
The default value must only be changed in exceptional cases.
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