Hexagonal Motor Flux; Settings; Programmable Protection Functions; Ai<Min - ABB ACS800 Firmware Manual

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Hexagonal motor flux

Typically, the drive controls the motor flux in such a way that the rotating flux vector
follows a circular pattern. This is ideal in most applications. When operated above
the field weakening point (FWP, typically 50 or 60 Hz), it is, however, not possible to
reach 100% of the output voltage. The peak load capacity of the drive is lower than
with the full voltage.
If hexagonal flux control is selected, the motor flux is controlled along a circular
pattern below the field weakening point, and along a hexagonal pattern in the field
weakening range. The applied pattern is changed gradually as the frequency
increases from 100% to 120% of the FWP. Using the hexagonal flux pattern, the
maximum output voltage can be reached; The peak load capacity is higher than with
the circular flux pattern but the continuous load capacity is lower in the frequency
range of FWP to 1.6

Settings

Parameter 26.05.

Programmable protection functions

AI<Min
AI<Min function defines the drive operation if an analogue input signal falls below the
preset minimum limit.

Settings

Parameter 30.01.

Panel loss

Panel loss function defines the operation of the drive if the control panel selected as
control location for the drive stops communicating.
Settings
Parameter 30.02.

External fault

External faults can be supervised by defining one digital input as a source for an
External fault indication signal.
Settings
Parameter 30.03.
Program features
·
FWP, due to increased losses.