Magnetics Business & Technology - November/December 2019 - 22

PRODUCT NEWS

Improved Coil Design Contributes to Higher
Power Density in ABB's New Industrial
Motors for Hazardous Locations

ABB has introduced new motors that use its improved coil design
for higher power, this time applied to models optimized for making the most of limited operating space in hazardous duty locations such as equipment-crowded oil platforms and refineries.
Based on the design of its high-performance rib cooled HXR
range, the new AXR 5000 and 5800 motors deliver an average of
15 percent more horsepower per pound than conventional totally
enclosed fan cooled (TEFC) motors but with a smaller frame size
in some power ratings. This helps save space, up to 8 inches
in overall length in some cases, which enables more compact
installations on oil platforms and in refineries.
The motor's coil design helps to increase the power density. The
active parts of the coil have been re-dimensioned for increased
power, and the company developed more accurate forming tools
to utilize the active material more efficiently. Overall coil quality
has been further enhanced, says ABB.
The engineering team also improved cooling, a critical factor to
extend the life of the motor. An internal cooling loop circulates air
inside the motor, moving heat to the frame. An external fan blows
air over the frame to remove the heat.
"The new cooling configuration offers a more thermally equalized motor, eliminating hot
spots that have been seen in
TEFC motors," says Charles
Blankenship, large AC motor
product manager. "Better
cooling reduces the thermal
stresses on the insulation
system, which helps improve
the motor's longevity."
This latest generation of
high voltage rib cooled motors is the outcome of a major engineering effort, says
ABB, incorporating the
experience it has gained
Model of rotating electromagnetic
over more than 130 years
traction (shield and rotor removed)
of manufacturing electric
motors.

Variohm EuroSensor Launches Two New
Magnetic Angle Sensors
Variohm EuroSensor has
recently introduced two
new magnetic sensors, one
a two-part puck and magnet programmable sensor,
shown above, and the other
its smallest-yet model in the
company's new series of
miniature Hall Effect angle
sensors.
Launched as part of the company's new Euro-CMRx range of
miniature Hall Effect programmable angle sensors, the EuroCMRK series comprises a two-part "puck" and separate magnet
design that is suited to position feedback tasks where especially
compact dimensions and extreme durability are essential. Based
on the company's proven and now further improved encapsulated Hall Effect sensor technology, the CMRK's offers minimal
axial length with customizable puck mounting and magnet dimensions.
A choice of five standard magnet options include threaded and
plug designs with the further option of custom or user supplied
magnets. Generous alignment tolerances between sensor and
magnet faces make for straightforward installation. In certain
applications, the sensor electronics and magnet can be located
through non-magnetic liquid or solid materials rather than air
space, adding further flexibility and enhanced protection in very
space restricted or environmentally challenging applications.
Its new Euro-CMRT micro threaded angle sensor, shown second,
is the company's smallest model in its new miniature programmable Hall Effect angle sensor range. With a diminutive 10 mm
diameter housing, the new sensors extend the CMRx range with
additional capabilities for non-contact sensing. Particularly durable and robust, the CMRT series is especially suitable for long
life, high duty-cycle precision angle measurement tasks where
space is at a real
premium or where its
design flexibility allows straightforward
mechanical and
electrical adaptation
to exactly match a
customer's requirements.
Based in Towcester, UK, Variohm specializes in developing
sensing solutions for numerous applications. Its Hall Effect sensor technology has been adapted and improved over many angle
sensor design iterations and has been used in arduous position
feedback measurement applications that include motorsports,
industrial automation, agricultural vehicles and construction
machinery.
For more info, see www.variohm.com.

Magnetics Business & Technology * November/December 2019

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Magnetics Business & Technology - November/December 2019

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