The currently used type of compensation is displayed in parameter is24 act. dead-
time mode. This shows whether the IGBT model or the e-function is used when
mode = "3: factory setting“.
No dead time compensation
Deadtime compensation according to the default-e-
function
factory calibrated IGBT model
Mode "e-function“:
Compensation method used up to software version 2.9.
In this mode, the dead time compensation is performed with an e-function stored in
the inverter.
The compensation characteristic can be modified with is08 and is09.
Determination of the compensation degree
100% => compensation value = deadtime value
Determination of the current for which the dead time characteristic is recorded
100% => the default value of the inverter is used
Mode "standard IGBT-model“:
In this mode, the dead time compensation is performed based on an IGBT model.
The parameters of the model have been calibrated at the factory.
Mode "ident IGBT-model“:
In the application, deviations from the values measured in the factory may occur for
the IGBT model due to the overall design (e.g. cable lengths used).
These optimized values can be determined with the identification (dr54 ident).
The result of the identification is displayed in parameter is04 in subindices 1...3.