Siemens SINAMICS G130 Operating Instructions Manual page 379

Note
Large spread of the rated motor impedance
Leakage values in excess of 35 to 40% of the rated motor impedance will restrict the
dynamic response of speed and current control in the voltage limit range and in field-
weakening operation.
Note
Perform standstill measurement with the motor in a cold state
Standstill measurement must be carried out when the motor is cold. In p0625, enter the
estimated ambient temperature of the motor during the measurement (with KTY sensor: set
p0600, p0601 and read r0035). This is the reference point for the thermal motor model and
thermal R
In addition to the equivalent circuit diagram data, motor data identification (p1910 = 3) can
be used for induction motors to determine the magnetization characteristic of the motor. Due
to the higher accuracy, the magnetization characteristic should, if possible, be determined
during rotating measurement (without encoder: p1960 = 1, 3; with encoder: p1960 = 2, 4). If
the drive is operated in the field-weakening range, this characteristic should be determined
for vector control in particular. The magnetization characteristic can be used to calculate the
field-generating current in the field-weakening range more accurately, thereby increasing
torque accuracy.
Note
Results of the rotating measurement
In comparison with standstill measurement (p1910) for induction motors, rotating
measurement (p1960) allows the rated magnetization current and saturation characteristic to
be determined more accurately.
Figure 9-2
Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
/R adaptation.
S R
Magnetization characteristic
Functions, monitoring, and protective functions
9.2 Drive functions
379