Programming
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D Page D-45
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E
FLUXING
SETUP::MOTOR CONTROL::FLUXING
Designed for VOLTS/Hz motor Control Mode.
This function block allows user parameterisation of the conventional (volts/hertz) fluxing strategy of the Drive. This is
achieved though three flexible Volts-to-frequency templates. Starting torque performance can also be tailored through the
FIXED BOOST, ACCELRTN BOOST and AUTO BOOST parameters.
Parameter Descriptions
V/F SHAPE
PREF: 21.01 Default: 0 Range: See below
This parameter determines the type of volts to frequency template that is used to flux the motor. The choices for this parameter
are:
Enumerated Value : V/F Shape
0 : LINEAR LAW
1 : FAN LAW
2 : USER DEFINED
LINEAR LAW : This gives a constant flux characteristic up to the BASE FREQUENCY (see MOTOR DATA function block).
FAN LAW: This gives a quadratic flux characteristic up to the BASE FREQUENCY. This matches the load requirement for
fan and most pump applications
USER DEFINED : This gives a user defined flux characteristic up to the BASE FREQUENCY.
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