User guide

5 Motor control (MCTRL)
5.1 Motor selection/Motor data
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Lenze · 8400 BaseLine C · Reference manual · DMS 1.6 EN · 01/2014 · TD05
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5.1.2 Automatic motor data identification
Via the "Identify motor parameters" device command " (C002/23), the inverter characteristic, the in-
fluences of the motor cable, and the motor parameters listed in the table below can be identified
automatically:
Parameter Info
C015
V/f base frequency
C016
V
min
boost
C021
Slip compensation
C084
Motor stator resistance
C085
Motor stator leakage inductance
C092
Motor magnetising inductance
C095 Motor magnetising current
 Danger!
During motor parameter identification, the motor is energised via the outputs U, V and
W of the controller!
Observe the corresponding safety instructions!
 Stop!
If motor parameter identification is aborted, unstable drive behaviour may be the result!
 Note!
• We strongly recommend motor parameter identification before the initial commis-
sioning of the sensorless vector control (SLVC).
• The motor parameter identification must be carried out when the motor is cold!
• The load machine may remain connected. Holding brakes, if present, may remain in
the braking position.
• With an idling motor, a small angular offset may occur at the motor shaft.
• The amplitude of the rated motor current (C088
) is injected to identify the stator re-
sistance. If the rated motor current amounts to less than 60 % of the rated inverter
current, at least 60 % of the rated inverter current will be injected to ensure sufficient
motor parameter identification accuracy.