Page 68

THE INFRASTRUCTURE

Eaton’s HyperCharger scales up to one megawatt Like EVs themselves, charging stations come in all shapes and sizes. Power management giant Eaton has announced the release of what may be the world’s highest-capacity charger. The new HyperCharger is capable of fast-charging EVs at power levels up to one megawatt (MW).

Designed to charge fleets of electric buses and other mass transit vehicles, the HyperCharger was recently installed in several cities, including Tallahassee, Fla., Worchester, Mass. and Stockton, Calif. The HyperCharger is scalable from 200 kW to 1 MW. According to Eaton, it has the highest energy density in its class. On a recent demonstration route, the HyperCharger recorded an average of eight charges and 240 miles per day. “Eaton has a long history of developing electrical and hybrid power systems for trucks and busses,” said Product Line Manager Michael Dadian. “Our new HyperCharger is the latest example of Eaton’s leadership in building a charging infrastructure across North America and helping to set the stage for mass adoption of EVs.”

68

SAE announces WPT frequency/power classes The SAE task force working on a standard for Wireless Power Transfer (WPT) has reached agreement on two important factors. These will be incorporated into a Technical Information Report, which is scheduled to be complete in early 2014. The TIR will be followed by publication of the official SAE J2954 Standard.

“A common frequency of operation for WPT is essential for interoperability,” said Task Force Chair Jesse Schneider. “After 3 years of international collaboration and investigation within the team, consensus had been reached on a nominal frequency of operation of 85 kHz for the light duty vehicle guideline. This frequency lies within an internationally available frequency band.” The SAE team has also determined three power classes for light duty vehicles: WPT 1, 2 and 3. These limits are defined by the maximum input Wireless Power Transfer power rating, as follows: • WPT1 - 3.7 kW • WPT2 (Private/Public Parking) - 7.7 kW • WPT3 (Light Duty Fast Charge) - 22 kW The task force is currently working on completing the remaining interoperability topics, including factors such as the minimum coupling factor “K,” alignment, and coil geometries.

CHARGED Electric Vehicles Magazine - Iss 11 DEC 2013  
CHARGED Electric Vehicles Magazine - Iss 11 DEC 2013  

CHARGED Electric Vehicles Magazine - Iss 11 DEC 2013