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ServoWire SD
Drives Overview
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ServoWire SD 230 Series
Network Drives: Eight models offer
continuous output currents from 2.5 to 60 amps RMS per phase
600 to 15,000 watts of output power
115 or 230 VAC input |
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ServoWire SD 460 Series
Network Drives: Six 460 Volt models offering
continuous output currents from 5 to 50 amps RMS/phase
2,400 to 24,000 watts of output power
230 or 460 VAC input bus; 115 or 230 VAC for
logic power |
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ServoWire SD drives are designed to offer high
performance motion control using all-digital servodrives connected via an open
standard FireWire network. Two series of drives offer solutions with power
from 600 to 24,000 watts, and continuous current output from 2.5 to 60 amps RMS/phase.
ServoWire SD Drives
ServoWire SD drives provide high performance servo
operation utilizing digital networking technology based on IEEE-1394b (FireWire).
This network not only provides high speed, but also ease of use through
cost-effective, industry-standard cabling. Each ServoWire drive supports a
variety of high performance servomotors. Consult ORMEC for OEM
applications of user-supplied brushless rotary or linear motors—as well as DC
brush- type and voice-coil motors. All ServoWire drives utilize reliable IGBT-based intelligent power modules and provide a cost effective solution for
today’s motion control applications.
ServoWire drives operate on DC, 115, 230 or 460 VAC
input power, and provide both output short circuit and overvoltage protection.
All-digital design eliminates the troublesome analog interface between PC and
drive systems, replacing it with a modern high-speed network based on the
IEEE-1394b standard.
Performance
ServoWire SD drives combine all-digital operation
with DSP technology to produce fast update rates, and correspondingly high
performance. The high bandwidth control loops in the ServoWire SD Drives, along
with high resolution motor feedback, combine for quick and accurate torque,
velocity and position control. Position, velocity and torque loops are all
closed in the ServoWire SD drives. This distributed control architecture allows
for high performance without placing a heavy computing burden on the SMLC or
host PC.
Programmable Drive Configuration
ServoWire drives have no pots, jumpers or field
component changes whatsoever. Even factory adjustments are digital,
automatically calibrated and stored in Flash memory. All user configurations are
done in software using axis configuration tools in our ServoWire Pro software.
Motor types are selected from a database of ORMEC standard products or the
custom motor editor can be used to add other motor types to the database.
Configuration data for each drive, containing motor parameters, all operational
limits for torque and speed, I/O configurations, load inertia and servo loop
tuning parameters, are stored in the SMLC and can be downloaded by
the application program as needed over the ServoWire network. Simple
cabling accommodates up to sixteen drives per network, and provides for quick
and reliable installation.
Standard Motor Interface
ServoWire SD drives interface to motors that use
encoders or resolvers. The encoders supported are quadrature encoders with hall track information,
or serial encoders.
The drives provide for smooth output torque by using three-phase sinusoidal commutation.
Integrated Drive I/O
Integrating high speed I/O at the drive level gives
the user greater flexibility and tighter control over the interaction between
motion and external sensors and actuators. External sensors can initiate motion
within one servo loop update and capture position with microsecond resolution.
Three optically isolated inputs, four optically isolated outputs and one
bi-directional I/O point are available. These may be used as general
purpose I/O or for a variety of preprogrammed functionality, including an e-stop
input, buffered encoder reference output, drive ready output, fail-safe brake
output and more.
IEEE 1394b Interface (OHCI)
The SD drives implement a 1394b interface, the third generation in the
evolution of this IEEE standard. This high speed network connects the drives
to the controller, providing significantly more control and data than is
possible with a low speed network. Data transfers run at up to 400 MBit
using the isochronous channel for time critical information and asynchronous
channel for other data. Compatibility to earlier 1394 versions is
maintained.
Feedback Option Modules
ServoWire SD drives include an interface for feedback option modules.
Feedback option modules provide for the addition of an auxiliary feedback
interface, making a ServoWire SD drive an axis and a half unit. These
modules also allow for a variety of motor feedback options, such as
resolvers, serial and multi-rev absolute encoders.
Safety & Maintainability
Safety interlocks are standard in all ServoWire
drives. The network’s integral safety interlocks and comprehensive alarm
detection provide safe operation for ServoWire drives and the SMLC or a host PC.
The I/O on each ServoWire Drive can be configured to include an e-stop input and
drive ready output, which can be connected to the machine e-stop interlock
circuit. Overall system maintainability is enhanced by extensive alarm detection
and reporting via the ServoWire network.
Click here for Adobe Acrobat version of ServoWire SD Drives Overview
Datasheet. (122k).
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