Baumuller b maXX BM5800 - Control Loop Analysis

Configuration
Parameter manual b maXX BM5800
Document No.: 5.16029.03 Baumüller Nürnberg GmbH
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of 814
3.4
3.4.8.5 Control loop analysis
It is possible to carry out an automatically plant identification and after this an automatic
setting of the position and speed controller as well as implementing the polynomial filter
of the torque current set value with the FFT analyzer function and operating program
ProDrive. In ProDrive on the Optimization  Control Loop Analysis page (refer to
ZFig.
62–) the automatic identification and controller setting can be executed.
Preparation
For this purpose the motor must be operated at a speed controller in speed control, which
was set low. The other possibility is to operate in current control with a low current pre
-
setting.
System information for the control loop analysis
For the distance identification and the optimization the following information of the system
is required: Kt factor, position-speed controller-sampling time and PWM frequency. From
the PWM frequency and assuming the amount optimum as a criteria for the parameter
-
ization of the current controller, the additional time constant of the closed control lop (cur-
rent time constant) can be evaluated.
Step 1: Recording control process (amplitude and phase response)
Noise is added to the additional current set value by "Start analysis". The evaluation of
the measuring values is processed via the FFT analyzer function. This evaluation deter
-
mines the frequency response.