Functions Of Field-Orientated Control; Current Controller - BONFIGLIOLI ACTIVE Cube ACU 201-01 Operating Instructions Manual

Behavior in motor operation:
If the current set via parameter
limit value controller will reduce the output frequency until the current limit is no
longer exceeded. The output frequency is reduced as a maximum to the frequency
set by the parameter
the output frequency is raised back to the reference value.
Behavior in generator operation:
If the current set via parameter
limit value controller will increase the output frequency until the current limit is no
longer exceeded. The output frequency is increased, as a maximum, to the set
imum frequency
quency is reduced to the required reference value again.
No.
613 I limit
614 Frequency Limit
The control behavior of the current limit value controller can be set via the propor-
tional component, the parameter
the parameter
necessary in exceptional cases, a setting should be done by a jump alteration of the
parameter
No.
611 Amplification
612 Integral time
The dynamics of the current limit value controller and the voltage controller is influ-
enced by the setting of the parameter
17.5

Functions of Field-Orientated Control

The field-orientated control systems are based on a cascade control and the calcula-
tion of a complex machine model. In the course of the guided commissioning, a map
of the connected machine is produced by the parameter identification and transferred
to various parameters. Some of these parameters are visible and can be optimized
for various operating points.

17.5.1 Current Controller

The inner control loop of the field-orientated control comprises two current control-
lers. The field-orientated control thus impresses the motor current into the machine
via two components to be controlled.
This is done by:
− controlling the flux-forming current value I
controlling the torque-forming current value I
−
By separate regulation of these two parameters, a decoupling of the system equiva-
lent to an externally excited direct current machine is achieved.
Operating Instructions ACU
06/13
Current limit
Frequency limit
Current limit
419. If the current is below the
Parameter
Description
Amplification
612. If an optimization of the controller parameters is
Integral time
613.
Current limit
Parameter
Description
613 is exceeded, the activated current
614. If the
Current limit
613 is exceeded, the activated current
Current limit
Settings
Min. Max.
0.0 A ü ⋅ I
0.00 Hz 999.99 Hz
611, and the integrating component,
Settings
Min. Max.
0.01 30.00
1 ms 10000 ms
Dyn. voltage pre-control
sd
sq
613 is fallen short of,
Max-
613, the output fre-
Fact. sett.
ü ⋅ I
FUN FUN
0.00 Hz
Fact. sett.
1.00
24 ms
605.
227