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

18.7

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. The various control functions can be supplemented
by special functions specific to the application.

18.7.1 Motor Chopper

The field-orientated control systems contain the function for adapted implementation
of the generator energy into heat in the connected three-phase machine. This en-
ables the realization of dynamic speed changes at minimum system costs. The torque
and speed behavior of the drive system is not influenced by the parameterized brak-
ing behavior. The parameter
switch-on threshold of the motor chopper function.
No.
507 Trigger threshold
The parameter
the maximum DC link voltage which the mains can generate and the maximum ad-
missible DC link voltage of the frequency inverter.
If the parameter
DC link voltage, the motor chopper cannot become active; the motor chopper is
switched off.
If the set
mains can generate, error message F0706 (chapter "Error Messages") is displayed
when the frequency inverter is switched on.
The motor chopper function only works if activated via voltage Controller
670. See chapter 17.2 "Voltage controller".
Mode
For synchronous motors (
activated to prevent damages to the motor. The other functions of the voltage control-
ler are not affected by this.
Please note that by default the Motor chopper
Threshold
up fittingly for your application.
Operating Instructions ACU
06/13
Trigger threshold
Parameter
Description
Trigger threshold
⋅
U
Netz
Trigger threshold
507 is smaller than the maximum DC link voltage the
Trigger threshold
Configuration
506 are set up with different values. Check, that the two thresholds are set
507 of the DC link voltage defines the
Settings
ACU Min.
201 225
1000.0 V
401 425
507 is to be set in such a way that it is between
⋅ < <
1,1 2 U Ud
dMC max
507 is set larger than the maximum admissible
30 = 5xx), the motor chopper function is de-
Trigger Threshold
Max. Fact. sett..
400
800
Operation
507 and the
Trigger
251