Motor Data Identification - Siemens SINAMICS S120 Function Manual

Servo control

5.15 Motor data identification

5.15 Motor data identification
Requirement
● The first commissioning has been completed. The following must be fulfilled:
– The electrical motor data (motor datasheet) or rating plate data have been entered.
– The calculation of the motor and control parameters (p0340) has been completed.
Function description
The motor data identification (MotID) is used as a tool to determine the motor data, e.g. of third-
party motors and can help to improve the torque accuracy (k
Commissioning the function
To commission the MotID, proceed as follows:
1. Enter the motor data, rating plate data and, if applicable, the encoder data.
2. The converter determines the motor and control data as starting value for the MotID
(p0340 = 3, if motor data has been entered, p0340 = 1, if rating plate data was entered).
3. Make a stationary measurement (p1910).
4. For synchronous motors:
Perform a commutation angle calibration (p1990) and, if necessary (e.g. because of
overtraveling the zero mark), perform a fine synchronization (see r1992).
Note
Absolute encoders do not have to be finely synchronized.
Further information
– Detailed information about calibrating the commutation angle is provided in Chapter
– Detailed information about performing fine synchronization is provided in Chapter "Pole
5. Make a rotating measurement (p1960).
Before starting the rotating measurement, check and, if necessary, optimize the setting of
the speed controller (p1460, p1462 and p1470, p1472).
It is preferable if the rotating MotID is carried out with the motor de-coupled from the
mechanical system. This therefore means that only the motor moment of inertia is
determined. The total moment of inertia with mechanical system can be subsequently
identified with p1959 = 4 and p1960 = 1. The stress on the mechanical system can be
reduced by parameterizing the ramp-up time (p1958), using direction limiting (p1959.14/
p1959.15) or using the current and speed limit. The higher the selected ramp-up time, the
less accurately the moment of inertia can be determined.
6. To store the results of the MotID retentively, execute the "Copy RAM to ROM" command.
142
"Commutation angle offset commissioning support (p1990) (Page 165)".
position identification (Page 150)" under "Pole position correction with zero marks".
estimator).
T
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions