Lenze E94AxPExxxx - Manual (Page 219)

Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
219
6 Motor interface
6.5 Sensorless vector control (SLVC)
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6.5.2.4 Motor rotor resistance
This adjustment is carried out at a setpoint speed of approx. 75 % of the rated speed and with a
defined load (e. g. measuring brake). The precondition for the adjustment is that the actual speed
is known (e. g. by the use of a manual tachometer). At constant setpoint speed first the actual speed
is measured while the machine is unloaded. Afterwards the motor is loaded at the same setpoint
speed until the rated torque is reached (rated current). The speed measured should preferably
correspond in idle state and at rated speed.

How to adjust the motor rotor resistance:
1. Select setpoint speed 0 rpm
2. Enable controller.
3. Slowly increase the setpoint speed to approx. 75 % of the rated speed and keep this value
constant.
4. Measure actual speed n
Idle
(e.g. using a manual tachometer) and take it down.
5. Increase load of the motor until the motor current displayed in C00054 corresponds to the
rated current.
6. Measure actual speed n
Load
.
7. If n
Load
< n
Idle
:
• Reduce motor rotor resistance stepwise and indirectly via the Rr adjustment in C02860
until the following applies: n
Load
≈ n
Idle
.
If n
Load
> n
Idle
:
• Increase motor rotor resistance stepwise and indirectly via the Rr adjustment in C02860
until the following applies: n
Load
≈ n
Idle
.
8. Unload the motor again and slowly reduce the setpoint speed to 0 rpm again.
9. Inhibit controller.
10. Save parameter set ( C00002 = "11: Save start parameters").