Siemens SINAMICS S120 Function Manual page 107

General conversion to parameters for general order filters:
● Numerator natural frequency:
● Numerator damping:
● Denominator natural frequency:
● Denominator damping:
General low-pass with reduction
Table 3- 7 Example of general low-pass with reduction
STARTER filter
parameters
Characteristic frequency
f = 500 Hz
Abs
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
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
ω
= =
π
2
2
⎛ ⎞
⎜ ⎟
1 1
= • • −
⎜ ⎟
20
10 1
⎜ ⎜ ⎟ ⎟
2
⎝ ⎠
20
10
=
Amplitude log frequency curve
2
+
2
•
10
10
= f (start of reduction)
Z Abs
N
N
Servo control
3.7 Current setpoint filters
Phase frequency curve
105