Vector Control Optimisation - Lenze 8200 vector Instructions De Montage

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Commissioning
7

Vector control optimisation

The vector control is usually ready for operation after the motor parameter identification. Vector control
must only be optimised for the following drive performance:
Drive response
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 for acceleration times (C0012)
< 1 s (controller can no longer
follow the dynamic processes)
38
Remedy
1. Reduction of motor inductance (C0092) by
10 %
2. Check of motor current under C0054
3. If the motor current is (C0054) > approx. 50
% of the rated motor current, reduce C0092
until approx. 50 % rated motor current is
reached.
Increase of motor resistance (C0084) or
increase of motor inductance (C0092)
Increase of slip compensation (C0021)
Change readjustment time of the I
(C0078):
Reduction of C0078 = I
l
becomes quicker (more dynamic)
Increase of C0078 = I
l
slower ("smoother")
EDK82EV222 DE/EN/FR 6.0
controller
max
controller
max
controller becomes
max
Note
Reduce C0092 by
max. 20 %!
Overcompensation
results in drive
instability!
L