Note About The Electronic Motor Model - Siemens Sinamics S120 Function Manual

Parameterization with STARTER
The "current setpoint filter" parameter screen is selected via the following icon in the toolbar
of the STARTER commissioning tool:
Figure 3-15
3.8

Note about the electronic motor model

A model change takes place within the speed range p1752*(100%-p1756) and p1752. With
induction motors with encoder, the torque image is more accurate in higher speed ranges;
the effect of the rotor resistance and the saturation of the main field inductance are
corrected. With synchronous motors with encoder, the commutation angle is monitored. If
the kT estimator has been activated, the torque image for synchronous motors is more
accurate too.
3.9 V/f control
Description
For U/f control, the drive is operated with an open control loop. In this open-loop control
system, the drive does not require speed feedback and no actual current sensing. Operation
is possible with a small amount of motor data.
With U/f control, the following components and data can be checked:
● Motor Module
● Power cable between the Motor Module and motor
● Motor
● DRIVE-CLiQ cable between the Motor Module and motor
● Encoder and actual encoder value
The following motors can be operated with V/f control:
● Induction motors
● Synchronous motors
Note
In V/f mode, the calculated actual speed value is always displayed in r0063. The speed of
the encoder (if installed) is displayed in r0061. If an encoder is not installed, r0061 displays
"0".
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
STARTER icon for "current setpoint filter"
3.8 Note about the electronic motor model
Servo control
91