Siemens SINAMICS S120 Function Manual page 200

Vector control
5.4 Speed controller adaptation
Example of speed-dependent adaptation
①
②
③
Figure 5-8
For operation without encoder, a higher value is in p1464 than in p1465. As a consequence,
the behavior is inverted: K
Special case, encoderless operation in the field-weakening range
In encoderless operation, dynamic reduction for the field-weakening range can be activated
with p1400.0 = 1.
K /T
p
K /T
p
This dynamic reduction is activated to reduce the controller dynamic response in the field-
weakening range. Up to the field-weakening range, the higher controller dynamic of the
speed controller is kept.
Function diagrams (see SINAMICS S120/S150 List Manual)
• 6050
200
Constant lower speed range (n < p1464)
Adaptation range (p1464 < n < p1465)
Constant upper speed range (n > p1465)
Speed controller-K
p
∼ flux setpoint
n
decreases proportionally with the flux setpoint (minimum: Factor 0.25).
n
Vector control - Speed controller adaptation (K
/T adaptation
p_n n_n
increases with increasing speed and T
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
decreases.
n
-/T adaptation)
p_n n_n
Drive functions