Siemens SINAMICS G220 - Current Setpoint Filter

14.10.6 Current setpoint 󹪝lter
Overview
A current setpoint 󹪝lter suppresses critical frequency components and thereby prevents the
excitation of oscillations by the speed controller. A current setpoint 󹪝lter therefore increases the
achievable machine dynamics in critical applications.
Requirement
The Dynamic Drive Control operating mode or the closed-loop speed control mode is selected.
Description of function
The converter has 2 current setpoint 󹪝lters connected in series. The following choices are
available for each current setpoint 󹪝lter:
• PT2 low-pass


%
/
T
)
T

wT
ȌG
/
ȌG
/
f
N
=Denominator natural frequency 
D
N
=Denominator damping 
Figure14-149 Transfer function of the 2ndorder low-pass
• General 2ndorder 󹪝lter
)
T

wT
wT
%
/
ȌG
;
ȌG
/
ȌG
;
%
;
ȌG
/


T
T
f
Z
=Numerator natural frequency 
D
Z
=Numerator damping 
f
N
=Denominator natural frequency 
D
N
=Denominator damping 
Figure14-150 Transfer function for a general 2ndorder 󹪝lter.
With the correct adjustment, it is possible to achieve a bandstop or a low-pass with reduction.
Depending on p1699, changed 󹪝lter settings take e󹪜ect at di󹪜erent times:
• p1699=0
The changed settings take e󹪜ect immediately.
• p1699=1
The changed settings do not take e󹪜ect until p1699=0.
Functions
14.10Closed-loop drive control
SINAMICS G220 converter
548 Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB