Commissioning
Parameter setting with the XT EMZ9371BC keypad
Vector control
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144
EDK82EV222 DE/EN/FR 13.0
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 Remedy
Rough motor run and motor current (C0054) > 60 % rated
motor current in idle running (steady−state operation)
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!
Torque too low for frequencies f < 5 Hz (starting torque) Increase motor resistance (C0084) or motor inductance
(C0092)
Poor speed stability at high load (setpoint and motor
speed are no longer proportional)
Increase slip compensation (C0021)
Overcompensation results in drive instability!
Error messages OC1, OC3, OC4 or OC5 at acceleration
times (C0012) < 1 s (controller is no longer able to follow
the dynamic processes)
Change reset time of the I
max
controller (C0078):
l Reduce C0078 = I
max
controller becomes faster (more
dynamic)
l Increase C0078 = I
max
controller becomes slower
("smoother")
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