Lenze 8200 Vector Instructions De Montage page 140

Vector control optimisation
In general, the vector control is ready for operation after the motor parameters have been
identified. Vector control must only be optimised for the following drive performance:
Drive performance
Rough motor run and motor current (C0054) > 60 % rated motor
current in idle running (stationary operation)
Torque too low for frequencies f < 5 Hz (starting torque)
Poor constant speed at high loads (setpoint and motor speed are
not proportional).
Error messages OC1, OC3, OC4 or OC5 during acceleration times
(C0012) < 1 s (drive controller is no longer able to follow the
dynamic processes)
L
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Using the keypad XT EMZ9371BC − Vector control
Remedy
1. Reduction of motor inductance (C0092) by 10 %
2. Check of motor current under C0054
3. If the motor current (C0054) > 50 % rated motor current:
– C0092 must be reduced until the motor current amounts to
50 % of the rated motor current
– Reduce C0092 by max. 20 %!
Increase of motor resistance (C0084) or increase of motor
inductance (C0092)
Increase of slip compensation (C0021)
Overcompensation results in drive instability!
Change readjustment time of the I
Reduction of C0078 = I
l
dynamic)
l Increase of C0078 = I
("smoother")
EDK82EV113 DE/EN/FR 8.1
7
Commissioning
−32−
controller (C0078):
max
controller becomes quicker (more
max
controller becomes slower
max
139