ABB ACS880 Firmware Manual page 306

306 Parameters
No. Name/Value
Reduced
Standstill
Autophasing
Current
measurement
calibration
Advanced
Description
Reduced ID run. This mode should be selected instead of the
Normal or Advanced ID Run if
• mechanical losses are higher than 20% (i.e. the motor
cannot be de-coupled from the driven equipment), or if
• flux reduction is not allowed while the motor is running (i.e.
in case of a motor with an integrated brake supplied from
the motor terminals).
With this ID run mode, the resultant motor control in the field
weakening area or at high torques is not necessarily as
accurate as motor control following a Normal ID run. Reduced
ID run is completed faster than the Normal ID Run (< 90
seconds).
Note: Check the direction of rotation of the motor before
starting the ID run. During the run, the motor will rotate in the
forward direction.
WARNING! The motor will run at up to approximately
50...100% of the nominal speed during the ID run.
ENSURE THAT IT IS SAFE TO RUN THE MOTOR
BEFORE PERFORMING THE ID RUN!
Standstill ID run. The motor is injected with DC current. With
an AC induction (asynchronous) motor, the motor shaft is not
rotated. With a permanent magnet motor, the shaft can rotate
up to half a revolution.
Note: This mode should be selected only if the Normal,
Reduced or Advanced ID run is not possible due to the
restrictions caused by the connected mechanics (e.g. with lift
or crane applications).
During autophasing, the start angle of the motor with respect
to its feedback device is determined. Note that other motor
model values are not updated. See also parameter
Autophasing mode.
Notes:
• Autophasing can only be selected after a Normal,
Reduced, Standstill or
performed once. Autophasing is used with a permanent
magnet motor when an absolute encoder, a resolver or an
encoder with commutation signals has been added or
replaced, and there is no need to perform the
Normal/Reduced/Standstill/Advanced
• During Autophasing, the motor shaft must NOT be locked
and the load torque must be < 5%.
Current offset and gain measurement calibration is set to
calibrate the control loops. The calibration will be performed
at next start.
Advanced ID run. Guarantees the best possible control
accuracy. The ID run can take a couple of minutes. This mode
should be selected when top performance is needed across
the whole operating area.
Note: The driven machinery must be de-coupled from the
motor because of high torque and speed transients that are
applied.
WARNING! The motor may run at up to the maximum
(positive) and minimum (negative) allowed speed
during the ID run. Several accelerations and
decelerations are done. The maximum torque, current and
speed allowed by the limit parameters may be utilized.
ENSURE THAT IT IS SAFE TO RUN THE MOTOR BEFORE
PERFORMING THE ID RUN!
Advanced ID run has been
ID run again.
Def/FbEq16
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21.13
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