Efficient Networks Siemens Sinamics S120 - Manual (Page 137)

Vector control
4.10 Current setpoint filter
Drive Functions
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
137
● p1256[0...n] Vdc_min controller response (kinetic buffering) (control)
● p1257[0...n] Vdc_min controller speed threshold (controller)
● r1258 CO: Vdc controller output (control)
4.10 Current setpoint filter
Description
The two current setpoint filters connected in series can be parameterized as follows:
● Low-pass 2nd order (PT2): -40 dB/decade)
● General 2nd-order filter
STARTER converts band-stop and low-pass with reduction in the parameters of the
general 2nd order filter.
– Bandstop
– Low-pass with reduction by a constant value
The phase frequency curve is shown alongside the amplitude log frequency curve. A
phase shift results in a control system delay and should be kept to a minimum.
Function diagrams (see SINAMICS S List Manual)
● 6710 Current setpoint filters
Overview of key parameters (see SINAMICS S List Manual)
● p1655 CI: Current setpoint filter natural frequency tuning
● ...
● p1666 Current setpoint filter 2 numerator damping
4.11 Current controller adaptation
Description
Current controller adaptation can be used to adapt the P gain of the current controller and
the dynamic pre-control of the Iq current controller depending on the current. Current
controller adaptation can be deactivated with the setting p1402.2 = 0.