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GE Scientists Successfully Test World-Class Traction Motor for Hybrid and Electric Vehicles - GE prototype delivers higher power density, acceleration, and energy efficiency in a smaller frame at a lower cost
GE Scientists Successfully Test World-Class Traction Motor for Hybrid and Electric Vehicles

 

PRZOOM - /newswire/ - Niskayuna, NY, United States, 2012/07/26 - GE prototype delivers higher power density, acceleration, and energy efficiency in a smaller frame at a lower cost. NYSE: GE

   
 
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Motor extends the range of electric vehicles and reduces fuel consumption on hybrids

Motor has almost twice the temperature tolerance of conventional hybrid-electric motors and does not require a separate cooling system

Engineers at GE Global Research are advancing motor technology that could have a substantial impact on hybrid and electric vehicles (EVs) of the future.

GE recently tested a prototype Interior Permanent Magnet traction motor, developed as part of a $5.6MM U.S. Dept. of Energy (DoE) project, that could help extend the range EVs and hybrids can travel before recharging or needing gasoline. Traction motors are the key part of the propulsion system that converts electrical energy into motion to drive hybrid and electric vehicles. Not only is the GE-designed motor less costly to make, lab testing revealed that it is more powerful and more efficient than what is on the market today. Combined, the additional power output and efficiency will help extend the range of EVs and delay the point at which hybrids switch to gasoline.

GE’s prototype traction motor operates at a peak power level of 55kW and exceeds state-of-the-art motors in the same class in several key areas:

· Nearly twice the power density (acceleration)
· 3-5% more efficient
· Required torque achieved using much lower DC bus voltage – as low as 200 volts versus 650 volts
· Operates continuously at a higher temperature; no need for dedicated cooling loop.

Widespread adoption of hybrid and EVs will benefit from advancements, like this, in motor technology.

“This is a significant accomplishment. We at GE are pushing the boundaries to build more robust, yet more efficient motors for hybrid and fully electric platforms”, said Ayman El-Refaie, Electrical Engineer, in GE Global Research’s Electrical Machines Lab. “We have built a motor that is substantially more powerful than what’s commercially available now, all while improving efficiency by up to 5%.”

Unlike conventional traction motors, which run at 65ºC and require their own dedicated cooling loop, GE’s motor operates continuously at 105ºC over a wide speed range (2,800 - 14,000 rpm at 30 kW) and can be cooled with engine coolant. Without the need for additional cooling lines, a hybrid will be lighter and cost less.

GE has built several prototypes of this new motor. It’s been fully tested in the lab and demonstrated for DoE, but further testing must be done for reliability before commercial production is considered.

“This technology is scalable and flexible enough that it can be leveraged in a number of capacities”, said El-Refaie. “What we learned through this project will help us build higher efficiency industrial motors, high-speed oil and gas compressor motors, and generators for aerospace applications.”

Another important accomplishment of this project was the development of high-resistivity (3X) permanent magnets. This high resistivity will significantly lessen magnet losses and reduce or eliminate the need to segment the magnets. This will help keep costs down even more.

A four-year project will follow-up on this work, as GE engineers set out to build a comparably performing motor with no rare-Earth magnets.

About GE Global Research

GE Global Research is the hub of technology development for all of GE's businesses. Our scientists and engineers redefine what’s possible, drive growth for our businesses, and find answers to some of the world’s toughest problems.

We innovate 24 hours a day, with sites in Niskayuna, New York; San Ramon, California; Bangalore, India; Shanghai, China; Munich, Germany; and Rio de Janeiro, Brazil.

 
 
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GE Scientists Successfully Test World-Class Traction Motor for Hybrid and Electric Vehicles

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Contact: Todd Alhart - GE Global Research 
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