Fig. 3-24 Magnetizing Characteristic - Siemens MICROMASTER 440 Operating Instructions Manual

Issue 10/03
Fig. 3-24
After selecting the motor data identification using parameter P1910, alarm A0541 is
immediately generated. The motor identification routine is started by the ON
command and different excitation signals are impressed in the motor (DC and AC
voltages). This measurement is carried-out with the motor at a standstill and it
takes, including the data calculation per selection (P1910 = 1.3) between 20 s ... 4
min. The identification time depends on the motor and increases with its size (this
takes approx. 4 min for a 200 kW motor).
The motor data identification routine must be carried-out with the motor in the cold
condition so that the motor resistance values saved can be assigned to the
parameter of the ambient temperature P0625. Only then is correct temperature
adaptation of the resistances possible during operation.
The motor data identification routine operates with the results of the "Complete
parameterization" P0340 = 1 or the motor equivalent diagram data which was last
saved. The results become increasingly better the more times that the identification
routine is executed (up to 3 times).
WARNING
It is not permissible to carry-out the motor identification routine for loads which
are potentially hazardous (e.g. suspended loads for crane applications). Before
starting the motor data identification routine, the potentially hazardous load
must be secured (e.g. by lowering the load to the floor or clamping the load
using the motor holding brake).
When starting the motor data identification routine, the rotor can move into a
preferred position. This is more significant for larger motors.
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0
Φ [%]
P0365
P0364
100 %
P0363
P0362
0
P0366 P0367 100 % P0368
i [A]
µ
i [%] =
µ
r0331
Magnetizing characteristic
3 Functions
P0369
i [%]
µ
83