Trust Automation, Inc. TA333 High Power Linear Servo Amplifier
10-Apr-09
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housing reduces the risk of operator injury and protects the drive, ensuring longer useful life. All
connections utilize pluggable terminal connectors making them easy to install and remove while
reducing the risk of connection errors.
1.2 Setup
The TA333 is configurable for several drive motor type options and configurations. All configurations
require the use of bipolar supplies that can be in the range of 24 to 100V. Current outputs are
adjustable from 10 to 25A.
Some of these options are shown in the application example section.
1.3 Drive Modes
Sinusoidal
Sinusoidal commutation of three-phase brushless servo motors plus a linear drive power stage
eliminates the familiar cogging and torque ripple problems that plague most trapezoidal digital drives.
Control is consistent and smooth at any velocity.
In sinusoidal mode, the TA333 is designed to accept two command signals (A and B @ ±10V) from a
motion controller that is performing the commutation based upon encoder feedback. The TA333 derives
the third phase internally (C = - (A+B)).
(See application example 5.1 and 5.2)
Trapezoidal
Trapezoidal operation is the simplest configuration used to drive a DC brushless motor. The TA333
reduces the audible tick often associated with Hall commutation by smoothing the transitions without
sacrificing performance. As a practical limitation, Hall commutation is limited to ~ 3 kHz throughput. In
this mode, the motors Hall Sensors are connected to J4. If the motor has differential Hall outputs, only
connect the “+” Hall outputs to J4 and leave the “–” Hall signals unconnected. (Do not tie to ground, the
motor will be damaged.)
The motion command signal (±10V) is connected to the “A” command input.
(See application example
5.3)
Brushed-Bridge
Brushed-bridge mode supports operating a traditional brushed or voice coil-type motor, bridged across
the A & C output phases. The command signal (±10V) is connected to the “A” command input.
(See
application example 5.4)
Brushed-Dual
This mode supports driving two independent brushed or voice coil-type motors. This mode could also
be used to drive a stepper motor in sinusoidal mode. The first motor (winding) would be connected to
the “A” phase output and the common ground of the bipolar power supply. The second motor (winding)
would connect to the “B” phase output and the common ground. The command inputs (±10V) are
connected to the “A” and “B” command inputs.
(See application examples 5.5 and 5.6)
