Control Techniques Unidrive Servo Series Product Data page 5

drive overview
Unidrive
The Unidrive is an advanced AC drive for use with
AC brushless permanent magnet servo motors. The
Unidrive's set up can be easily and quickly changed
from the on-board keypad, a remote keypad, or
through UniSoft, a Windows ™ based configuration
software tool.
Sizes
There are five physical sizes comprising 26
different models ranging from 1NM to 2500 NM*. The
drive is designed for stand alone as well as
coordinated systems applications. There are hundreds
of configurable functions in 20 logically organised
menus. All functions are factory defaulted to typical
values to facilitate easy set-up.
Parameters
The Unidrive's most commonly used parameters
are stored in Menu 0. This menu is defaulted with
those parameters which are typically accessed, but
the user may map any of the drive's other
parameters to this menu for easier access. This
approach means easy access for those parameters
the user selects.
Flexibility
In addition Unidrive has many other of embedded
configurable functions which are easily adapted for
virtually any application. Some of these configurable
functions include items such as assignable I/O,
autotune, encoder feedback, frequency and direction
pulse signal input and output, axis limit control, ratio
control, electronic holding brake, S-ramps, position
control and many others.
Technology
Many of these important product features would not
be possible without the use of advanced technology in
the Unidrive. The drive employs advanced
microprocessor technology which controls all drive
functions including input to the inverter ASIC
(Application Specific Integrated Circuit) which
synthesises an adjustable carrier frequency PWM
(Pulse Width Modulation) output. The ASIC output
controls the IGBT (Insulated Gate Bipolar Transistor)
inverter section. All printed circuit boards are
manufactured using surface mount technology.
Regeneration
The Regeneration mode is used for four-quadrant
operation. A Drive can be operated in Regeneration mode
only when it is connected to other Drive(s) operating in
one of the other (motoring) modes.
Regeneration mode allows the following:
AC supply to be fed from the Regeneration Drive to
the Drive(s) that are controlling the motor
Regenerated power to be returned to the AC supply
by the Regeneration Drive instead of being dissipated
in braking resistors
Regeneration Module Control Mode
Regenerating
Unidrive
AC Supply
Filter
and
Start
Circuit
* For ratings above 65NM please consult your local Drive/Application centre
Motoring
Unidrive
+
AC
DC Bus
Motor
—
5