Motor Control; Motor Types; Motor Identification; Scalar Motor Control - ABB ACQ80-04 Firmware Manual

Motor control



Motor types

The drive supports asynchronous AC induction and permanent magnet (PM) motors.


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 the first time the start
command is given. During this first start-up, 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 demanding applications a separate Identification run (ID run) can be performed.
Settings
99.13 ID run requested


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 ID run is not required.
• In multimotor systems:
• if the load is not equally shared between the motors
• if the motors are of different sizes
• if the motors are going to be changed after motor identification (ID run)
• If the nominal current of the motor is less than 1/6
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 177).
Program features 41
th
of the nominal output current
(page 31).