Pole Position Identification - Siemens SINAMICS S120 Function Manual

Operating Modes
Vector control
Integration
Automatic encoder adjustment is integrated into the system in the following way:
Overview of important parameters:
S p0404.15
S p0431
S p1990
S p1999
3.2.14

Pole position identification

Description
The pole position identification routine is used to determine the pole position.
3 pole position identification techniques can be selected:
S p1980 = 1, voltage pulsing, first harmonic
This technique also functions for magnetically isotropic motors if adequate iron
saturation can be achieved.
S p1980 = 4, voltage pulsing, two-stage
This technique functions with motors that are magnetically anisotropic. During
the measurement, the motor must be at a standstill. The measurement is
carried-out the next time that the pulses are enabled.
Note
Using this type of identification, the motor can emit a significant amount of noise.
S p1980 = 10, DC current impression
This technique functions for all motors; however, it takes more time than the
measurement selected using p1980 = 4. During the measurement, the motor
must be able to rotate. The measurement is carried-out the next time that the
pulses are enabled. For extremely high moments of inertia, the run time can be
scaled higher using p1999.
3-156
Commutation with zero mark
Commutation angle offset
Encoder adjustment selection
Angular commutation offset calibration, scaling
© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition