Siemens Sinamics S120 Function Manual page 177

During motor data identification, the drive may cause the motor to move.
The Emergency Off functions must be fully operational during commissioning. To protect
the machines and personnel, the relevant safety regulations must be observed.
Motor data identification (p1910)
Motor data identification with p1910 is used for determining the motor parameters at
standstill (see also p1960: speed controller optimization):
● Equivalent circuit diagram data p1910 = 1
● Magnetization characteristic p1910 = 3
For control engineering reasons, you are strongly advised to carry out motor identification
because the equivalent circuit diagram data, motor cable resistance, IGBT on-state voltage,
and compensation for the IGBT lockout time can only be estimated if the data on the rating
plate is used. For this reason, the stator resistance is a very important for the stability of
sensorless vector control or for the voltage boost in the V/f curve. Motor data identification is
essential if long supply cables or third-party motors are used. When motor data identification
is started for the first time, the following data are determined with p1910 on the basis of the
data on the rating plate:
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).
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
DANGER
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)
4.14 Motor data identification and rotating measurement
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 has been
completed, the motor is automatically rotated
approx. one revolution in order to determine the
zero mark of the encoder.
Vector control
175