Siemens SINAMICS S120 Function Manual page 148

Vector control
4.12 Motor data identification and rotating measurement
Table 4- 2 Data determined using p1910
Induction motor
p1910 = 1 •
•
•
•
•
•
•
p1910 = 3 •
Since the rating plate data contains the initialization values for identification, you must
ensure that it is entered correctly and consistently (taking into account the connection type
(star/delta)) so that the above data can be determined.
It is advisable to enter the motor supply cable resistance (p0352) before the standstill
measurement (p1910) is performed, so that it can be subtracted from the total measured
resistance when the stator resistance is calculated (p0350).
Entering the cable resistance improves the accuracy of thermal resistance adaptation,
particularly when long supply cables are used. This governs behavior at low speeds,
particularly during sensorless vector control.
Figure 4-19 Equivalent circuit diagram for induction motor and cable
If an output filter (see p0230) or series inductance (p0353) is used, the data for this must
also be entered before the standstill measurement is carried out.
The inductance value is then subtracted from the total measured value of the leakage. With
sine-wave filters, only the stator resistance, valve threshold voltage, and valve interlocking
time are measured.
148
Stator resistance (p0350)
Rotor resistance (p0354)
Stator leakage inductance (p0356)
Rotor leakage inductance (p0358)
Magnetizing inductance (p0360)
Drive converter valve threshold voltage (p1825)
Drive converter valve interlocking times (p1828
... p1830)
Saturation characteristics (p0362 ... p0366)
Permanent-magnet synchronous motor
Stator resistance (p0350)
•
Stator resistance q axis (p0356)
•
Stator inductance d axis (p0357)
•
Drive converter valve threshold voltage
•
(p1825)
Converter valve interlocking times (p1828 ...
•
p1830)
Not recommended
Notice: When encoder adjustment is complete,
the motor is automatically rotated approx. one
revolution in order to determine the zero marker
of the encoder.
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions