Siemens SINAMICS S120 Function Manual page 80

Servo control
3.7 Current setpoint filter
Table 3-2 Example of a PT2 filter
STARTER filter parameters
Characteristic frequency f
Damping D 0.7 dB
N
Band-stop with infinite notch depth
Table 3-3 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 frequency f
● Numerator damping D
● Denominator natural frequency f
● Denominator damping
80
Amplitude log frequency curve
500 Hz
N
Amplitude log frequency curve
Z
= 0
Z
= f
Sp
= f
N Sp
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Phase frequency curve
Phase frequency curve
Drive Functions