Commissioning
Operation with motors from other manufacturers
Adjusting current controller
6
137
EDBCSXA064 EN 3.2
Leakage inductance and stator resistance of the motor are not known:
The current controller can be optimised metrologically with a current probe and an
oscilloscope. For this, a test mode is available in which the current C0022 x Ö2 flows in phase
U after controller enable.
Stop!
Avoid damage to the motor and machine
ƒ During the current controller adjustment, the motor must be freely
rotatable.
ƒ The test current must not exceed the maximum permissible motor current.
ƒ Always adjust the current controller at a switching frequency of 8 kHz.
Observe the current step in phase U to adjust the current controller.
Setting sequence
1. Select 8 kHz as switching frequency (C0018 = 2).
2. Select the test current under C0022:
– Start with a low current value, e.g. half the rated motor current.
3. Activate the test mode with C0418 = 1.
4. Enable the controller. ( 131)
– Adjust the synchronous motor.
– The asynchronous motor remains at standstill.
5. Enable and inhibit the controller several times in a row changing the current
controller gain (C0075) and the current controller adjustment time (C0076) such
that the current characteristic is free of harmonics.
6. After the adjustment has been completed, deactivate the test mode with C0418 = 0.
7. If required, change the switching frequency under C0018.
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