Notes Regarding Pole Position Identification; Messages And Parameters - Siemens SINAMICS S120 Function Manual

5.14.3

Notes regarding pole position identification

A suitable technique for the motor is selected using parameter p1980. The following
techniques are available:
● Voltage pulsing 1st harmonic (p1980 = 1)
● Voltage pulsing 2-stage (p1980 = 4)
● Voltage pulsing 2-stage inverse (p1980 = 6)
● Voltage pulsing 2nd harmonic inverse (p1980 = 8)
● Impressing DC current
All of these techniques are only possible at standstill. The fast pole position identification can
be selected if a faster switch-on is required (p1780.13 = 1).
Supplementary conditions
The following supplementary conditions apply for the pulsed techniques (p1980 = 1, 4, 6, 8):
● This procedure can be used for both braked and non-braked motors.
● The specified current magnitudes (p0325, p0329) must be sufficient to provide a
significant measuring result (p0325 is only used for p1980 = 4).
● Technique p1980 = 4 is recommended if the air gap manifests significant asymmetry (e.g.
magnets are embedded in the rotor). Technique p1980 = 1 should be applied if the air
gap is constant.
● Technique p1980 = 8 is recommended for synchronous reluctance motors.
● Technique p1980 = 6 is used for synchronous motors with a high reluctance torque
component.
The following constraints apply when impressing DC current (p1980 = 10):
● The motor must be free to move and it may not be subject to external forces (no
hanging/suspended axes).
● If a motor holding brake is being used, then this must be opened.
● The technique is recommended if there is no magnetic asymmetry (e.g. symmetrical air
gap).
5.14.4

Messages and parameters

Faults and alarms (see SINAMICS S120/S150 List Manual)
• F07413
• A07967
• F07968
• F07969
• F07970
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Drive: Commutation angle incorrect (pole position identification)
Drive: Automatic encoder adjustment/pole position identification incorrect
Drive: Lq-Ld measurement incorrect
Drive: Pole position identification incorrect
Drive: Automatic encoder adjustment incorrect
Vector control
5.14 Pole position identification
261