Lenze 8200 motec Montageanleitung Seite 110

7
Commissioning
Vector control
Optimising the vector control
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)
108
efesotomasyon.com - Lenze
−13−
EDK82MV371 DE/EN/FR 6.0
Remedy
1. Reduction of motor inductance (C0092) by 10 %
2. Check of motor current under C0054
3. If the motor current (C0054) > 50 % of the rated
motor current:
– C0092 must be reduced until the motor current
amounts to 50 % of the rated motor current
– Reduce C0092 by max. 20 %!
– Note: If you reduce C0092 the torque will
decrease!
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
(C0078):
Reduction of C0078 = I
l
quicker (more dynamic)
l Increase of C0078 = I
slower ("smoother")
controller
max
controller becomes
max
controller becomes
max
L