Extended Torque Control (Kt Estimator, Servo) - Siemens Sinamics S120 Function Manual

7.6

Extended torque control (kT estimator, servo)

Features
● k
● Compensation of the voltage emulation error of the drive converter (p1952, p1953)
● Configuration via p1780
Description
The "extended torque control" function module comprises two modules - the k
the compensation of the voltage emulation error of the drive converter. As a consequence,
the torque accuracy is increased.
Note
When this function module is activated, the maximum number of drives that can be
controlled from a Control Unit is reduced by at least one drive.
Commissioning
The extended torque control is activated offline:
1. Right-click on the drive > "Properties ...
2. Click on the "Function modules" tab
3. Select "Extended torque control" by clicking in the option check box
4. Activate the function module by clicking "OK"
5. Then select "connect with selected target devices"
6. "Load project to target system".
Activation can be checked in parameter r0108.1.
Description of the k
T
The adaptation of the torque constants for synchronous motors is used to improve the
absolute torque accuracy for the control (closed-loop) of synchronous motors. The
magnetization of the permanent magnets varies as a result of production tolerances and
temperature fluctuations and saturation effects. The function "k
constant k
the k
inner motor torque. The frictional losses must be compensated from the friction characteristic
using a supplementary torque.
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
estimator (only for synchronous motors)
T
The window " >"Object properties" is opened.
A list of possible function modules is opened
estimator
[Nm/A] in the control to the prevailing magnetization. It only makes sense to use
T
estimator in conjunction with the friction characteristic as the k
T
7.6 Extended torque control (kT estimator, servo)
estimator" adapts the torque
T
Function modules
estimator and
T
estimator corrects the
T
331