Lenze 8400 - Page 227

Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23 227
5 Motor control (MCTRL)
5.8 Sensorless control for synchronous motors (SLPSM)
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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: Clamp operation active
• oC1: Power section - short circuit
• The optimisation degree "0 %" is displayed in C02870
.
• The time "0 ms" is displayed in C02871
.