Lenze 8400 StateLine - Manual (Page 198)

5 Motor control (MCTRL)
5.8 Sensorless control for synchronous motors (SLPSM)
198
Lenze · 8400 StateLine · Reference manual · DMS 12.0 EN · 06/2014 · TD05/TD14
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Optimising the pole position identification

How to optimise the pole position identification without motion:
1. For optimisation, enable the controller for various rotor displacement angles.
2. After every controller enable, check the optimisation degree displayed in
C02870 .
The pole position identification is set optimally if an optimisation degree in the range 70 ...
130 % is displayed in C02870 after every controller enable.
3. When the optimisation degree is > 130 %:
Reduce the setting in C02872 step by step an execute controller enable for various rotor
displacement angles until an optimisation degree < 130 % is displayed.
4. When the optimisation degree is < 70 %:
Increase setting in C02872 step by step and execute controller enable for various rotor
displacement angles until an optimisation degree > 70 % is displayed.
5. Optionally: C02875 serves to increase or reduce the identified electrical rotor displacement
angle. This can prevent e.g. a reversing of the motor due to the accuracy of identification if
applications require it.

Stop!
In case of a too high setting in C02872 , an impermissible motor current may occur during
pole position identification. In this case, the "Fault" error response occurs and the "Id5:
Pole position identification error" error message entered in the logbook.
In case of aconsiderably too high setting in
C02872 :
• The following current monitoring functions can be triggered:
• OC7: Motor overcurrent
• OC11: Active clamp operation
• OC1: Power section - short circuit
• The optimisation degree "0 %" is displayed in C02870 .
• The time "0 ms" is displayed in C02871 .