Lenze Global Drive 8200 vector Instructions De Montage page 139

Optimising the vector control
In general, the vector control is ready for operation without any further measures after the motor
parameters have been identified. The vector control must only be optimised in the case of the
following drive behaviour:
Drive behaviour
Rough motor run and motor current (C0054) > 60 % rated
motor current in idle running (steady−state operation)
Torque too low for frequencies f < 5 Hz (starting torque)
Poor speed stability at high load (setpoint and motor
speed are no longer proportional)
Error messages OC1, OC3, OC4 or OC5 at acceleration
times (C0012) < 1 s (controller is no longer able to follow
the dynamic processes)
EDK82EV222 DE/EN/FR 13.0
Parameter setting with E82ZBC keypad
Remedy
1. Reduce motor stator inductance (C0092) by 10 %
2. Check motor current in C0054
3. If the motor current (C0054) is > 50 % of the rated
motor current:
– Reduce C0092 until the motor current is
approx. 50 % of the rated motor current
– Reduce C0092 by max. 20 %!
– Note: If you reduce C0092, the torque will decrease!
Increase motor resistance (C0084) or motor inductance
(C0092)
Increase slip compensation (C0021)
Overcompensation results in drive instability!
Change reset time of the I
l Reduce C0078 = I
dynamic)
l Increase C0078 = I
("smoother")
l
Commissioning
Vector control
controller (C0078):
max
controller becomes faster (more
max
controller becomes slower
max
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