Siemens Sinamics S120 Function Manual page 89

Table 3- 3 Example of a PT2 filter
STARTER filter parameters
Characteristic frequency f
Damping D 0.7 dB
N
Band-stop with infinite notch depth
Table 3- 4 Example of band-stop with infinite notch depth
STARTER filter parameters
Blocking frequency f = 500 Hz
Sp
Bandwidth (-3 dB) f = 500 Hz
BB
Notch depth K = -∞ dB
Reduction Abs = 0 dB
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
● Numerator damping D
● Denominator natural frequency f
● Denominator damping:
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Amplitude log frequency curve
500 Hz
N
Amplitude log frequency curve
= 0
Z
= f
Z Sp
= f
N Sp
Servo control
3.7 Current setpoint filters
Phase frequency curve
Phase frequency curve
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