Power Play: Pegasus™ MHV motor helps facilities operate more efficiently
FORT WAYNE, IN — GE Motors, part of GE Consumer & Industrial, introduces Pegasus™ MHV, a new Horizontal AC Induction motor for applications in such industries as petrochemical, power generation, water and wastewater, pulp and paper, cement, mining and metals. GE's new Pegasus™ MHV motor yields an average of 40 percent more horsepower than GE's standard Custom 8000 design. It also improves efficiency and power factor, while lowering overall motor weight.
Pegasus™ MHV is a medium and high voltage motor with a range from 300 to 7,000 HP in a 2, 4, and 6 pole design. It is a global product that can be manufactured in a NEMA® (National Electrical Manufacturers Association) or IEC design, while meeting a wide range of standards.
Ventilation and Cooling Improvements
The newly designed Pegasus™ MHV motor improves heat transfer with a low–pressure drop. It features an internal fan to match internal airflow requirements; an external fan designed for TEAAC enclosures to match cooler characteristics and reduce noise; and a redesign of the internal airflow circuit configuration to expand the heat exchange area and increase airflow.
Lower Vibration
A Pegasus™ MHV motor operates with less vibration than GE's standard Custom 8000. It exhibits a low vibration, low thermal vector and slow roll, meeting API–541 requirements when specified.
Its vibration and total electrical/mechanical run–out levels also meet stringent API 541 Fourth Edition standards, which translates as increased motor uptime and improved overall reliability. A test system compatible with vibration sensing methods that are normally used in oil and gas applications, allows a high sampling rate acquisition for vibration recording, and is capable of recording frequency spectrums and polar plots. Use of a dual frequency heat–run test minimizes erroneous vibration compared with a motor coupled to a dynamometer.
More Reliability and Convenience
A new Pegasus™ MHV motor is ideally suited for VFD applications with strict adherence to NEMA MG1 part 31 and IEEE–522. When used with a VFD the new GE motor also features insulated bearings and a shaft grounding brush, which decrease the possibility of circulating shaft currents.
Pegasus™ MHV motors employ self–aligning spherical seat sleeve bearings per DIN 31693 or anti–friction ball bearings. Sleeve bearings use construction features and sealing systems designed to keep the oil in and the dirt out. Seal additions are also available to meet IP–55 requirements (dust and water–jet proof). The babbitt–lined bearing shell is supported by a rugged housing that employs an oil ring to carry oil from the reservoir up to the bearing. The end shield and internal ventilation circuit have been modified to improve air circulation, enabling a cooler operating bearing. In addition, the motor's sight holes and split construction allow for easy inspection and replacement without uncoupling the drive load.
Reduced High Harmonics
Using the latest engineering simulation tools and modern modal testing equipment, GE designed the stator frame, which reduces the possibility of operating close to high amplification regions. Flexible or rigid shaft construction may be used based on specific application requirements and design criteria. This is critical when a motor is mounted to a compressor or pump skid.
For more information about GE's new Pegasus™ MHV motor, please contact your local GE Motors supplier, visit www.gemotors.com.
, or call 1–800–541–7191. Pegasus™ is a trademark of the General Electric Company.
About GE Motors
GE Motors is a world–class manufacturer of electric motors and generators with more than 125 years of experience. A business of GE Consumer & Industrial, GE Motors offers a full range of products, from fractional to 100,000 horsepower units, for highly demanding applications around the world. Driven by Lean Six Sigma methods and tools, GE Motors serves industrial and commercial industries such as Power Generation, Oil and Gas, Chemical, Mining, Pulp and Paper, Water/Wastewater, Cement, Metals, Electric Vehicles, and Appliances. GE Motors can design to any global standard and certification due to its extensive motor engineering and manufacturing experience. For more information, visit www.gemotors.com.
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