ABB ACQ580, Руководство по прошивке

Страница: 76 / 422

72 Program features
Motor control

Motor types
The drive supports asynchronous AC induction, permanent magnet (PM) and
synchronous reluctance motors (SynRM).

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 (page 295 ).

Scalar motor control
Scalar motor control is the default motor control method. In scalar control mode, the
drive is controlled with a frequency reference. However, the excellent performance of
vector control is not achieved in scalar control.
It is recommended to activate scalar motor control mode in the following situations:
• If the exact nominal motor values are not available or the drive needs to run
different motor after the commissioning phase
• If a short commissioning time is needed or no ID run is wanted
• In multimotor systems: 1) if the load is not equally shared between the motors, 2)
if the motors are of different sizes, or 3) 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 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.
In scalar control, some standard features are not available.
See also section Operating modes of the drive (page 40 ).