KEB COMBIVERT F6 Programming Manual

Motor parameterization
362
© 2022 KEB Automation KG
6.2.18.2 Stator resistance dr17
Basically valid for the operation at low output frequency, the model is stabilized
motor-driven with too small stator resistance and regenerative with too high re-
sistance. If the identification of the dead time is made to a resistance which is ad-
justed too low/high, the preset error factor compensates itself again.
6.2.18.3 ASM rotor resistance dr18
The rotor resistance changes with the temperature. To what extent also the rotor
time constant is changed and therefore the effect on the slip (e.g.) is dependent on
the construction of the motor.
6.2.18.4 ASM main inductance dr19
The main inductance dr19 can only be determined if the motor can rotate freely.
Identification is also possible with a load torque as long as the rump-up to identifi-
cation speed dr44 is possible with this torque.
The speed setpoint is determined via dr44 (default value 65% of the rated speed).
The acceleration / deceleration ramp is defined by co48…co60.
A start value for the head inductance is calculated with the selection in dr54 "mode"
= 1 or 2 (after writing on dr99). The head inductance is real identified with "mode“ =
1.
Calculation of the start value from:
▪ dr03 rated motor current
▪ dr09 rated torque
▪ dr07 ASM rated cos(phi)
▪ Pole-pair number of the motor (integer (rated frequency * 60 / rated speed) )
The calculation occurs according to the following formula:
    󰇛 
󰇛
  
󰇛

󰇜
 
󰇜
󰇜
 



 




󰇛    󰇜
 



If the motor does not rotate during the identification, although the load torque is
smaller than the rated torque, the start value for the head inductance was eventu-
ally calculated too high. Then the value in dr19 must be reduced and the identifica-
tion must be started again with the single measurement (dr54=8). Also an incor-
rectly set speed controller or too slow ramp times for the ramp-up can lead to er-
rors in the identification of the main inductance.

KEB COMBIVERT F6 Specifications

General

Brand	KEB
Model	COMBIVERT F6
Category	Controller
Language	English