Siemens SINAMICS S120 Function Manual page 81

Band-stop with infinite notch depth
Table 3-3 Example of band-stop with infinite notch depth
STARTER filter parameters
f
Blocking frequency = 500 Hz
Sp
(--3dB) f
Bandwidth = 500 Hz
BB
K
Notch depth = --∞ dB
Abs
Reduction = 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
S Numerator frequency f
S Numerator damping 0
S Denominator frequency f
S Denominator damping D
© Siemens AG, 2005. All rights reserved
SINAMICS S120 Function Manual, 06/05 Edition
Amplitude log frequency curve
= f
Z Sp
= f
N Sp
f
BB
=
N
2 ⋅ f
Sp
Operating Modes
Servo control
Phase frequency curve
3-81