Trust Automation, Inc. TA333 High Power Linear Servo Amplifier
10-Apr-09 Page 22 of 38
2.5 TA333 Output Frequency Response
The TA333 design provides a relatively flat current output response up to 5 kHz for most motors.
Lower inductance motors (0.10mH) will yield a higher bandwidth and higher inductance motors (10-
15mH) will yield a lower bandwidth. There is no actual limit on how high the inductance can be, but
there are practical limitations based on Ohms Law that limit actual bandwidth response in a motor.
Excessively low inductances (<0.1mH) can result in current loop instability and result in uncontrolled
oscillations.
The TA333 has been factory tuned to give optimal performance over a wide variety of industry standard
motors. If the intended application for the TA333 requires a motor outside the usual inductance range,
and the full 5 kHz throughput is required, please contact support@trustautomation.com
to discuss your
requirements.
The following was plotted with a 1V command into a 0.820mH load with a DC resistance of 0.65Ω.
SRS
5.2182681 kHz -12.886 dB
100 Hz
Freq. Resp. Log Mag 3.99 s
50 kHz
-50
dB
0
dB
5
dB/div
B Done
11/29/07 15:20:18
Figure 12 – TA333 Frequency Response
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