Siemens SINAMICS S120 - Page 224

Vector control
5.4 Speed controller
Drive functions
224 Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Example of speed-dependent adaptation
①
Constant lower speed range (n < p1464)
②
Adaptation range (p1464 < n < p1465)
③
Constant upper speed range (n > p1465)
Figure 5-8 Speed controller-K
p_n
/T
n_n
adaptation
For operation without encoder, a higher value is in p1464 than in p1465. As a consequence,
the behavior is inverted: K
p
increases with increasing speed and T
n
decreases.
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
p
/T
n
∼ flux setpoint
K
p
/T
n
decreases proportionally with the flux setpoint (minimum: Factor 0.25).
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.
Parameterization with STARTER
The "Speed controller" parameter screen is selected with the icon in the toolbar of the
STARTER commissioning tool.
Function diagrams (see SINAMICS S120/S150 List Manual)
•
6050
Vector control
- Speed controller adaptation (K
p_n
-/T
n_n
adaptation)