p0620[0...n]
Thermal adaptation, stator and rotor resistance / Mot therm_adapt R
Access level: 4
Calculated: CALC_MOD_ALL Data type: Integer16
Can be changed: T, U
Scaling: -
Dynamic index: MDS, p0130
Unit group: -
Unit selection: -
Function diagram: -
Min:
0
Max:
2
Factory setting:
1
Description:
Sets the thermal adaptation of the stator/primary section resistance and rotor/secondary section resistance according
to r0395 and r0396.
Value:
0:
No thermal adaptation of stator and rotor resistances
1:
Resistances adapted to the temperatures of the thermal model
2:
Resistances adapted to the measured stator winding temperature
Note
For p0620 = 1, the following applies:
The stator resistance is adapted using the temperature in r0035 and the rotor resistance together with the model
temperature in r0633.
For p0620 = 2, the following applies:
The stator resistance is adapted using the temperature in r0035. If applicable, the rotor temperature for adapting the
rotor resistance is calculated from the stator temperature (r0035) as follows:
theta_R = (r0628 + r0625) / (r0627 + r0625) * r0035
p0621[0...n]
Identification stator resistance after restart / Rst_ident Restart
Access level: 2
Calculated: -
Data type: Integer16
Can be changed: T
Scaling: -
Dynamic index: MDS, p0130
Unit group: -
Unit selection: -
Function diagram: -
Min:
0
Max:
2
Factory setting:
0
Description:
Selects the identification of the stator resistance of induction motors after the Control Unit runs-up (only for vector
control).
The identification is used to measure the actual stator resistance and from the ratio of the result of motor data
identification (p0350) to the matching ambient temperature (p0625) the actual mean temperature of the stator winding
is calculated. The result is used to initialize the thermal motor model.
p0621 = 1:
Identification of the stator resistance only when the drive is switched on for the first time (pulse enable) after booting
the Control Unit.
p0621 = 2:
Identification of the stator resistance every time the drive is switched on (pulse enable).
Value:
0:
No Rs identification
1:
Rs identification after switching-on again
2:
Rs identification after switching-on each time
Dependency:
- perform motor data identification (see p1910) with cold motor.
- enter ambient temperature at time of motor data identification in p0625.
See also: p0622, r0623
NOTICE
The determined stator temperature of the induction motor can only be compared with the measured value of a
temperature sensor (KTY/PT1000) to a certain extent, as the sensor is usually the warmest point of the stator winding,
whereas the measured value of identification reflects the mean value of the stator winding.
Furthermore this is a short-time measurement with limited accuracy that is performed during the magnetizing phase
of the induction motor.
Parameters
7.2 Parameter list
SINAMICS G120X converter
552
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
