ABB ACQ80, Firmware Manual

Page: 55 / 390

Program features 55
 Motor identification
The performance of vector control is based on an accurate motor model
determined during the motor start-up.
A motor identification magnetization is automatically performed for the first
time when the start command is given. During this first startup, the motor is
magnetized at zero speed for several seconds and the motor and motor cable
resistance are measured to allow the motor model to be created. This
identification method is suitable for most applications.
In some applications a separate identification run (ID run) can be performed.
Settings
99.13 ID run requested
(page
268
).

Scalar motor control
Scalar motor control is the default motor control method. In scalar control
mode, the drive is controlled with a frequency reference.
ABB recommends to activate the scalar motor control mode in the following
situations:
• If the exact nominal motor values are not available or the drive needs to run
different motors after commissioning.
• If a short commissioning time is needed.
• If the application does not require the best possible motor control
performance.
• If the nominal current of the motor is less than 1/6
th
of the nominal output
current of the drive.
• If the drive is used without a motor connected (for example, for test
purposes).
• If the drive runs a medium-voltage motor through a step-up transformer.
• If the drive is equipped with a sine filter.
Note: Performance of the vector control is not achieved in scalar control.
See also section
Operating modes of the drive
(page
37
).