Lenze E94AxPExxxx - Manual (Page 188)

6 Motor interface
6.3 Adjusting motor and controller to each other
188
Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
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Process
If all conditions are met, the impedance of the controlled system is determined for approx. 30
different frequencies. These values are used to determine the electrical machine parameters by
means of a mathematical procedure.
• Since the procedure starts with very low frequencies and always considers several complete
periods, the whole process takes approx. 3 minutes.
• During the procedure, the motor is energised with a current, the r.m.s. value of which
corresponds to the lower of the following two values:
After the parameters have been extracted from the impedance, they are checked for consistency
with the required rated values. If an inconsistent parameter set is detected, is this an indication of
faulty rated values on the nameplate.
After successful completion...
...controller inhibit is set automatically and the motor data determined are set in the corresponding
codes.
• For a permanent acceptance of the settings, the parameter set must be saved ( C00002 = "11:
Save start parameters").
• With the device command C00002 = "42: Enable controller" the controller inhibit set
automatically during the procedure can be deactivated again.
In the event of an error
If an error occurs during the procedure or the pulse inhibit gets active (e.g. due to short-time
undervoltage), the procedure is terminated with controller inhibit without changing the codes for
the motor parameters.
or

Note!
During the procedure, the motor should not rotate.
With synchronous machines, this cannot always be ensured. Although the current flow
is produced in the torque-neutral axis, asymmetries in the machine lead to a rotation of
the rotor.
• In such a case, the measurement would be useless and would have to be repeated.
• As a remedy, we recommend to use a holding brake.
With asynchronous machines, slight rotations might possibly occur. Their influence on
the measurements is, however, not worth mentioning.
• In case of uncertainties, the measurement should be repeated several times to check
if the results for the stator resistance, the leakage inductance of the stator and the
rotor resistance differ widely. This should not be the case.
• The magnetising inductance and the cos(ϕ) values are not that important for the
diagnostics, because they are strongly non-linear.
Rated device current
1
2
--- Rated motor current ⋅