New AC NEMA Motors Delivers Average of 15% More Power Over Conventional Designs

Press Release Summary:

  • AXR 5000 and 5800 provides improved cooling, critical factor to extend the life of the motor
  • Offers more HP per pound than conventional TEFC motors but with smaller frame size in some power ratings
  • Features sleeve bearings that operate at cooler temperatures, last longer and are easy to maintain

Original Press Release:

ABB's New AXR Large AC Motors Offer Power-Dense Design for Hazardous Locations

Fort Smith, Arkansas, August 16, 2019 -- The AXR 5000 and 5800 Large AC NEMA motors deliver an average of 15 percent more power over conventional designs. They also meet American Petroleum Institute 541 and 547 standards for motors operating in the oil and gas industry.

ABB's AXR 5000 and 5800 motors offer more HP (horsepower) per pound than conventional TEFC (totally enclosed fan cooled) 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 new AXR motors also offer 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, ABB. "Better cooling reduces the thermal stresses on the insulation system, which helps improve the motor's longevity."

As the main terminal box and auxiliary box can be mounted in several positions, installation and maintenance are easy. This also means fewer spares are needed, which saves money. The rigid frame increases stability so that the motor can meet the stringent API vibration limit specifications.

AXR motors also feature sleeve bearings that operate at cooler temperatures, last longer and are easy to maintain. These motors are available with up to an IP56 rating, for protection against contaminants and dust ingress.


ABB (NYSE: ABB) is a pioneering technology leader with a comprehensive offering for digital industries. With a history of innovation spanning more than 130 years, ABB is today a leader in digital industries with four customer-focused, globally leading businesses: Electrification, Industrial Automation, Motion, and Robotics & Discrete Automation, supported by its common ABB Ability™ digital platform. ABB's market leading Power Grids business will be divested to Hitachi in 2020. ABB operates in more than 100 countries with about 147,000 employees.

ABB in the United States

ABB's U.S. and Americas business is headquartered in Cary, North Carolina. Since 2010, ABB has invested $14 billion in the United States, and the company continues to expand and localize its offerings for customers. ABB operates over 65 manufacturing facilities and employs approximately 24,000 people across the U.S.

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