Chemical Engineering April 2012 - 68

Focus
Novatorque
Force Control Industries
only rated point efficiencies of 93 and
92% for the 3- and 5-hp versions, respectively
- far exceeding the levels
achieved with induction motors, says
the manufacturer. In addition to
higher efficiencies, the PremiumPlus+
motors also maintain
their high efficiency over a much
wider speed range. These motors
are packaged in standard
NEMA frame sizes and
mounting dimensions
for easy substitution,
and are compatible with
readily available VFDs from most
leading manufacturers. - Novatorque,
Inc., Sunnyvale, Calif.
www.novatorque.com
Siemens Industry
Motion control for when rapid
speed changes are required
Posidyne clutch/brakes (photo) feature
oil-shear technology that allows
rapid and precise stopping, starting,
reversing, speed change and positioning
- all without adjustment and
virtually no maintenance, says the
manufacturer. These motion-control
devices are suited for applications
with frequent start/stop cycles, and
allow higher cycle rates (as high as
300 cycles per minute) to increase production
rates with lower downtime.
The unit dissipates heat through the
housing by flowing fluids from the
friction surface to the housing. Additional
heat can be dissipated by adding
an integral fan or a water-cooling
system, or even by withdrawing the
fluid out of the unit for additional heat
exchanger cooling and filtration. The
controller is totally enclosed, making
it impervious to dust, chips, chemicals,
coolants, caustic wash-down, weather
and more. - Force Control Industries,
Inc., Fairfield, Ohio
www.forcecontrol.com
These motors operate in
hazardous zones
Suitable for pumps, compressors, fans,
extruders and mixers in the chemical
and petrochemical industries, the
Loher Chemstar Ex nA II motor (photo)
is designed to fulfill the requirements
for use in hazardous Zone 2 applications.
For example, an extremely highquality
paint finish and galvanized
fan cowl protect against aggressive
atmospheres. Anti-condensation heating
is often no longer required - even
for high levels of air humidity. When
required, the motors can be equipped
with corrosion-resistant stainless-steel
screws and bolts. Shaft seals rated to
IP66 protect against water and dust,
68 ChemiCal engineering www.Che.Com april 2012
and the protection extends up to IP67.
The enclosure is manufactured out
of rugged, gray cast iron, and is
therefore extremely resistant
to corrosion. It also dampens
vibration and has a high
strength, says the manufacturer.
- Siemens Industry,
Inc., Norwood, Ohio
www.usa.siemens.com/
motors
Control machinery via
single network with this drive
The new Allen-Bradley PowerFlex
755 AC Drive with Integrated Motion
provides users with the simplicity of
using a single EtherNet/IP network
for complete machine control, thereby
eliminating the need for a dedicated
motion network. The ability to support
variable frequency drives, servo
drives, I/O, smart actuators and other
EtherNet/IP-connected devices on
a common network helps increase
design flexibility, improve system
performance and reduce engineering
costs, says the manufacturer. The
PowerFlex 755 AC drive and the Kinetix
6500 servo drive can reside on
the same standard network, helping
to simplify machine design, operation
and maintenance. Both drives provide
high-performance, closed- and openloop
drive control using the Common
Industrial Protocol (CIP) Motion technology
on EtherNet/IP. Users can also
configure the drives using the same
Rockwell Software RS Logix 5000
software. - Rockwell Automation,
Inc., Milwaukee, Wisc.
www.ra.rockwell.com
■
Gerald Ondrey
http://www.usa.siemens.com/ http://www.novatorque.com http://www.forcecontrol.com http://www.ra.rockwell.com http://www.Che.Com
Chemical Engineering April 2012

Table of Contents for the Digital Edition of Chemical Engineering April 2012
