Siemens SINAMICS S120 Function Manual page 105

● Denominator natural frequency f
● Denominator damping
Band-stop filter with defined notch depth
Table 5-4 Example: Band-stop filter with defined notch depth
Filter parameters
Blocking frequency f =
Sp
500 Hz
Bandwidth f = 500 Hz
BB
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
● Numerator damping
● Denominator natural frequency f
● Denominator damping
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Amplitude log frequency curve
= f
N Sp
Phase frequency curve
= f
Z Sp
= f
N Sp
Servo control
5.7 Current setpoint filter
103