Motor Data Identification For Induction Motors - Siemens SINAMICS S120 Function Manual

Parameters to control the MotID
The following parameters influence the MotID:
Table 5-10
Stationary measurement (MotID)
● p0640 current limit
● p1215 motor holding brake configuration
● p1909 motor data identification control word
● p1910 motor data identification, stationary
● p1959.14/.15 positive/negative direction
1)
Note
If a brake is being used and is operational (p1215 = 1, 3), the stationary measurement is made
with closed brake. If possible (e.g. no hanging/suspended axis), we recommend that the brake
is opened before the MotID (p1215 = 2). This also means that the encoder size can be adjusted
and the commutation angle calibrated.
5.15.1

Motor data identification for induction motors

The data are identified in the inverse gamma equivalent circuit diagram and displayed in r19xx.
The motor parameters p0350, p0354, p0356, p0358 and p0360 taken from the motor data
identification refer to the T equivalent circuit diagram of the induction machine and cannot be
directly compared. This is the reason that an r parameter is listed in the table, which displays
the parameterized motor parameters in the inverse gamma equivalent circuit diagram.
Table 5-11
Determined data (gamma)
r1912 identified stator resistance
r1913 rotor time constant identified
r1915 stator inductance identified
r1925 threshold voltage identified
r1927 rotor resistance identified
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Parameters for control
permitted
1)
The setting of p1959 has the following effects for the direction of rotation p1821:
● Positive direction permitted, for setting p1821 = 0, this means: Clockwise direction of
rotation
● Negative direction permitted, for setting p1821 = 1, this means: Counter-clockwise
direction of rotation
Data determined using p1910 for induction motors (stationary measurement)
5.15 Motor data identification
Rotating measurement
● p0640 current limit
● p1082 maximum speed
● p1958 motor data identification ramp-up/ramp-
down time
● p1959 rotating measurement configuration
● p1960 rotating measurement selection
Data that is accepted (p1910 = 1)
p0350 motor stator resistance, cold+ p0352 cable re‐
sistance
r0384 motor rotor time constant / damping time con‐
stant, d axis
-
-
r0374 motor resistance cold (gamma)
p0354
Servo control
145