Siemens SINAMICS S120 Function Manual page 82

Servo control
3.7 Current setpoint filter
● Denominator natural frequency
● Denominator damping
General low-pass with reduction
Table 3-6 Example of general low-pass with reduction
STARTER filter parameters
Characteristic frequency f
Damping D = 0.7
Reduction Abs = -10 dB
Conversion to parameters for general order filters:
● Numerator natural frequency f
● Numerator damping
● Denominator natural frequency f
● Denominator damping D
Transfer function general 2nd-order filter
Numerator natural frequency f
Numerator damping D
Denominator natural frequency f
Denominator damping D
82
Amplitude log frequency curve
= 500 Hz
Abs
Z
N
=
= f (start of reduction)
Z Abs
N
N
Z
N
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Phase frequency curve
Drive Functions