NEMA ESPG 2017 - 59


Crown TritonTM Motors
Three Critical Factors That Make This
The Best Motor In The Market ...



Conservative Design Philosophy
Hyundai has very conservative engineering and design philosophies, they do not accept
the 'Nominal Approach' of making motors. Every motor, not just the average of a group
of motors, must meet or exceed the target requirements such as temperature rise,
efficiency, noise and vibration.
The Nominal Approach: NEMA or other specifications may require that a motor have
a max temperature rise of 80°C at the rated load. The Nominal Approach allows that
the average of the entire lot not exceed 80°C, meaning that some motors may exceed
the requirement. All that matters is that the average of all motors does not exceed the
required value.
Summary - The Hyundai Approach: Hyundai requires that every single motor produced
does not exceed 80°C so they set their internal target at 7-8% less. This assures that
every motor produced meets the requirement. Hyundai uses this same philosophy for
many other critical attributes such as efficiency, noise level, vibration, full load speed,
locked rotor and breakdown torques.



Low Operating Temperatures Coupled
With A Premier Insulation System
Heat is the largest factor leading to premature insulation failure - the larger the buffer
between the actual motor temperature and the temperature rating of the insulation
system is, the longer the insulation life will be.
Hyundai's approach for a reliable insulation system is to use Class N varnish, which is
rated for 200°C and limits the temperature rise to ~74°C. This results in a larger buffer
between the actual temperature and what the insulation system can handle without
breaking down. With a 40°C ambient and a motor running at the nameplate load this
buffer for an HHI motor is a whopping 86°C (200-74-40 = 86). Compare this to a typical
motor with an 80°C rise and Class F insulation, the buffer is only 35°C (155-80-40=35).
Remember the old adage, for every 10°C cooler electrical products run, the life expectancy
of the insulation system doubles. An 86°C buffer is a big deal if you want a motor that
will last a long time.
Summary - Hyundai motors run cooler and provide a larger buffer of protection for the
insulation system which results in long life. An additional benefit of this design allows
you to apply a stock motor in higher ambient conditions and still provide a good buffer.



Low Vibration
Vibration leads to premature bearing failure and can damage the coupled equipment.
Hyundai's approach to a low vibration motor ... Shoot for less than half of the NEMA
requirement, don't cut cost with lighter weight end bells, machine all motors with a
precise foot flatness and use only the best bearings.
NEMA requires a finished motor to have a vibration level that does not exceed
.15 inch/second peak. Hyundai's conservative approach sets the target at
~.07 inch/second peak. All motors are precision balanced, feet are machined to a
flatness of ~0.005", end bells are heavily ribbed and only premium bearings such as
NSK, SKF or FAG are used.
Summary - heavy cast iron frames, precision balance rotors and precise foot flatness
leads to lower vibration and thus longer bearing life and less damage to other equipment.

Contact Us For More Information

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Table of Contents for the Digital Edition of NEMA ESPG 2017

NEMA ESPG 2017 - Cover1
NEMA ESPG 2017 - Cover2
NEMA ESPG 2017 - 1
NEMA ESPG 2017 - 2
NEMA ESPG 2017 - 3
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NEMA ESPG 2017 - Cover3
NEMA ESPG 2017 - Cover4
http://www.nxtbook.com/ygsreprints/NEMA/espg_nxtbook
http://www.nxtbook.com/ygsreprints/NEMA/2014_espg
http://www.nxtbook.com/ygsreprints/NEMA/2013_espg
http://www.nxtbook.com/ygsreprints/NEMA/g33088_nema_ei_apr13
http://www.nxtbook.com/ygsreprints/NEMA/espg_nxtbook2012
http://www.nxtbook.com/ygsreprints/NEMA/2011_espg
http://www.nxtbookMEDIA.com