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Jan 24th, 2012
Bombardier selects Maxwell technologies' ultracapacitors for innovative rail transit braking energy recuperation system
Maxwell Technologies, Inc. announced today that Bombardier Transportation, a leading producer of rail vehicles and rail transportation equipment, systems and services, has selected Maxwell ultracapacitors as the energy storage element of the BOMBARDIER* EnerGstor*® braking energy recuperation system.
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Each stationary "wayside" EnerGstor unit incorporates an ultracapacitor array that is capable of storing up to two kilowatt hours of electrical energy generated by a rail vehicle's braking energy recuperation system. Recuperative braking is accomplished by running the vehicle's electric motor backwards to stop the vehicle with the motor's resistance. An electric motor running backwards also acts as an electric energy generator or dynamo that converts kinetic energy into electrical energy that can be stored for future use. The EnerGstor system offers multiple benefits to rail system operators, including:

  • A 20 to 30 percent reduction in grid power consumption
  • Improved regulation of line voltage across a multi-stop rail system
  • Significant reduction in brake maintenance expense, and
  • Backup power to enable vehicles to reach a station in the event of a grid power failure

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