Servo control
4.6 Current setpoint filter
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
107
Simplified conversion to parameters for general order filters:
● Reduction or increase after the blocking frequency (Abs)
● Infinite notch depth at the blocking frequency
● Numerator natural frequency f
Z
= f
Sp
● Numerator damping D
Z
= 0
● Denominator natural frequency f
N
= f
Sp
● Denominator damping:
Bandstop with defined notch depth
Table 4- 5 Example of band-stop with defined notch depth
Amplitude log frequency curve
Blocking frequency f
Sp
=
500 Hz
Bandwidth f
BB
= 500 Hz
Notch depth K = -20 dB
Reduction Abs = 0 dB
Simplified conversion to parameters for general order filters:
● No reduction or increase after the blocking frequency
● Defined notch at the blocking frequency K[dB] (e.g. -20 dB)
● Numerator natural frequency f
Z
= f
Sp
● Numerator damping:
● Denominator natural frequency f
N
= f
Sp
● Denominator damping:
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