Rockwell Automation 1391ES AC Servo Controller - Manual (Page 5)

Introduction
Chapter 1
1-3
The 1391B-ES is generally used with a computer aided, closed loop
positioning system to control the position and linear or rotary motion of
various machine members on an automated machine.
All components are mounted in an open framed package with a slide-on
front cover. The controller is intended to be panel mounted in an enclosure
and ventilated with filtered and/or cooled air. An internal fan is included to
circulate air over the power heat sink.
The 1391B-ES converts a three-phase, 50/60 Hz input, to a variable AC
voltage with controlled phase, amplitude and frequency. The output which
is proportional to a user supplied analog command, regulates the speed
and/or current (torque) of a 1326 permanent magnet AC servomotor. The
controller is available in ratings of 15, 22.5 and 45A RMS with all package
sizes being identical. A 1391 Transformer, 1326 AC Servomotor and 1326
Cables complete the servo system.
Standard Features The 1391B-ES contains a number of standard features required in a typical
automated machine servo system.
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Input protected against transient voltage.
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A power line/DB contactor which opens the AC line to the controller
and inserts a shunt regulator resistor across the DC bus whenever the
contactor is de-energized.
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An integral circuit breaker which will open all three AC line leads in the
event of a short circuit condition in the power circuitry.
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A standard 300V DC power bus supply that includes an integral shunt
regulator.
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A shunt regulator resistor to dissipate the energy generated by the motor
during regenerative braking.
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Velocity loop components to compensate for a system inertia range
between 0.03 to 1.0 lb.-in.-s
2 .
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User selectable mechanical resonance filtering.
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Patented current control implementation.
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Acceleration or torque feedforward differential input.
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DIP switch configurable.
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Logic Boards that can be quickly removed and easily interchanged for
troubleshooting and diagnostics.
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Three controller ratings that are in the same physical package and have
identical mounting dimensions.
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True vector control.
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Up to 300 feet (91.4 meters) between controller and motor.