Commissioning
7.4 Commutation angle and pole position identification
1FE1 synchronous built-in motors
Hardware Installation Manual, 12/2016, 610.43000.40b
127
Select "Zero marks" for the fine synchronization. The other fields are already
preassigned. The "Saturation-based 1st harmonic" is selected and acknowledged using
"Pole position ID parameter".
6.
The configuration is completed when the wizard is closed and the data has been loaded
into the drive. The correct pole position identification technique (p1980) is preassigned
with the motor-specific identification currents (p0325, p0329) and their selection (p1982).
7.
Check the control direction of the drive, i.e. the encoder in r0061 must return a positive
actual speed value for a clockwise motor, before you determine the commutation angle
offset.
8.
Select p1990 = 1 to determine the correct commutation angle offset (p0431). In the expert
list, switch-on the drive using the commissioning tool (control panel) (PLI will be
performed). p1990 = 1.
9.
Enter a small speed setpoint. After the zero mark has been crossed for the first time, the
determined commutation angle offset is automatically entered into p0431. Alarm A07971
is output during the determination routine. p1990 is automatically set to the value of 0 at
the end of the measurement.
10.Check whether the automatically determined value in p0431 is plausible. Several
techniques are recommended in the parameter description for p1990 (see SINAMICS
S120/S150 List Manual LH1).
If the angle is already known (e.g. final acceptance report), use this value to check the
determined value.
Note
Deviations > 5°
For deviations > 5°, the authorized technical personnel of the manufacturer must be
contacted.
7.4.2
Pole position identification variants
The pole position identification is available in two variants.
Motion-based pole position identification
Induction-based pole position identification
Precondition
The rotor must be able to freely rotate.
•
The rotor can rotate freely or be blocked
•
The pole position identification requires a
minimum current. The rated current (S1
current) of the motor module must be
≥
50% of the rated motor current.
Accuracy of determining the
rotor position.
High, independent of the magnetic proper-
ties
Dependent on the magnetic motor charac-
teristics
Effect of series reactors
The deployment of series reactors has no
effect on the result.
When using series reactors or for motors
with a low degree of saturation, the accuracy
when determining the rotor position is low or
the pole position identification does not pro-
vide any result at all.
