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April 23, 2013 /PRNewswire/ -- Maxwell Technologies, Inc. (Nasdaq: MXWL) announced today that it is supplying ultracapacitors for an energy-saving braking energy recuperation system that American Maglev Technology (AMT), is installing on light rail vehicles operated by the
Portland, Oregon area's Tri-County Metropolitan Transportation District (TriMet).
TriMet won a
$4.2 million grant from the U.S. Department of Transportation's Federal Transit Administration (FTA) Transit Investment for Greenhouse Gas and Energy Reduction (TIGGER) program to improve the efficiency of its fleet of 101 light rail vehicles equipped with regenerative braking after determining that the vehicles were able to use only about 70 percent of the energy generated by braking.
In regenerative braking systems, the electric motor that propels an electric or hybrid vehicle also does most of the braking. When the brakes are applied, instead of employing a conventional friction-based braking process, the system signals the electric motor to run in reverse mode, creating resistance to slow the vehicle. An electric motor running backwards also acts as an electric energy generator or dynamo that converts the kinetic energy of motion into electrical energy that can be stored for reuse, improving efficiency.
In TriMet's system, energy generated by decelerating vehicles is fed into the traction electrification system for use by other vehicles on the system. TriMet is using the TIGGER funding to retrofit 27 vehicles with the American Maglev-designed, ultracapacitor-based, energy storage system, which captures and stores regenerative braking energy as it is generated, uses the stored energy for acceleration, and releases surplus energy to other vehicles on the system as needed. The 27 retrofitted vehicles are being paired with non-capacitor equipped vehicles so that stored energy can be used by both vehicles.
To measure and validate anticipated energy savings, TriMet will compare in-service energy consumption data collected by on-board vehicle propulsion computers before and after the retrofit. According to a bulletin published by the FTA and prepared by the U.S. Department of Energy's National Renewable Energy Laboratory (NREL), preliminary data collected by TriMet indicate that the roof-mounted ultracapacitor-based energy storage systems will result in annual energy savings of approximately 2.8 percent. The FTA bulletin may be accessed via the following link:
"The use of Maxwell's ultracapacitors in our Energy Storage Systems has resulted in unprecedented energy savings as we strive to make light rail vehicles greener and more energy efficient," said
Tony J. Morris, the president and CEO of AMT. "We see this as a new, enabling, sustainable technology that can be applied in many other transportation environments."
"With their ability to charge and discharge in as little as fractions of a second, ultracapacitors are highly efficient in capturing energy generated during braking events that last only a few seconds and then quickly releasing stored energy as needed for acceleration," said
David Schramm, Maxwell's president and CEO. "In addition to this and other rail installations, fuel-efficiency and emission-reduction benefits are being realized by more than 10,000 Maxwell ultracapacitor-equipped hybrid-electric transit buses in daily operation around the world."
About American Maglev: American Maglev Technology, Inc. (AMT) designs and deploys innovative technologies that shape magnetic fields, providing new, sustainable solutions in transportation and energy storage. AMT built and currently operates the only full-scale magnetic levitation test track in
the United States and is currently working with its strategic partners and initial customers to deploy the technology commercially. The company has developed and continues to fortify an extensive portfolio of intellectual property that protects its proprietary technology. For more information, please visit our website:
About Maxwell: Maxwell Technologies is a leading developer and manufacturer of innovative, cost-effective energy storage and power delivery solutions. Our ultracapacitor products provide safe and reliable power solutions for applications in consumer and industrial electronics, transportation and information technology. Our high-voltage grading and coupling capacitors help to ensure the safety and reliability of electric utility infrastructure and other applications involving transport, distribution and measurement of high-voltage electrical energy. Our radiation-mitigated microelectronic products include power modules, memory modules and single board computers that incorporate powerful commercial silicon for superior performance and high reliability in aerospace applications. For more information, please visit our website:
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