Speed Controller Precontrol And Reference Model - Siemens SINAMICS S120 Function Manual

Vector control
6.4 Speed controller
● p1455[0...n]
● p1456[0...n]
● p1457[0...n]
● p1458[0...n]
● p1459[0...n]
● p1466[0...n]
Speed-dependent Kp_n/Tn_n adaptation
● p1460[0...n]
● p1461[0...n]
● p1462[0...n]
● p1463[0...n]
● p1464[0...n]
● p1465[0...n]
Dynamic response reduction field weakening (SLVC only)
● p1400.0
6.4.2

Speed controller precontrol and reference model

Speed controller precontrol
The command behavior of the speed control loop can be improved by calculating the
acceleration torque from the speed setpoint and connecting it on the line side of the speed
controller. The torque setpoint "mv" is calculated as follows:
This torque setpoint "mv" is applied to the current controller or the current controller is
precontrolled using adaptation elements directly as additive reference variable (enabled via
p1496).
The motor moment of inertia p0341 is calculated directly during commissioning or when the
entire set of parameters is calculated (p0340 = 1). The factor p0342 between the total moment
of inertia J and the motor moment of inertia must be determined manually or by means of speed
controller tuning. The acceleration is calculated from the speed difference over the time "dn/dt".
Note
When speed controller tuning is carried out, the ratio between the total moment of inertia and
that of the motor (p0342) is determined and acceleration precontrol scaling (p1496) is set to
100%.
When p1400.2 = p1400.3 = 0, precontrol balancing is set automatically.
224
CI: Speed controller P gain adaptation signal
Speed controller P gain adaptation lower starting point
Speed controller P gain adaptation upper starting point
Lower adaptation factor
Upper adaptation factor
CI: Speed controller P gain scaling
Speed controller P gain adaptation speed, lower
Speed controller Kp adaptation speed, upper scaling
Speed controller integral time adaptation speed, lower
Speed controller Tn adaptation speed, upper scaling
Speed controller adaptation speed, lower
Speed controller adaptation speed, upper
Speed control configuration: Automatic Kp/Tn adaptation active
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions