Rail

Bombardier selects Maxwell ultracapacitors for energy storage

Posted on January 19, 2012

Bombardier Transportation has selected Maxwell Technologies Inc. ultracapacitors as the energy storage element of the Bombardier  EnerGstor braking energy recuperation system.

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% reduction in grid power consumption.

• Improved regulation of line voltage across a multi-stop rail system.

• Significant reduction in brake maintenance expense.

• Backup power to enable vehicles to reach a station in the event of a grid power failure.

The ultracapacitor-based energy storage unit captures and stores energy that otherwise would be wasted in a conventional, friction-based, braking system. Ultracapacitors also provide extremely long operational life in the demanding public transit environment and function normally at extreme temperatures, contributing to system reliability and reduced operating expenses.

Maxwell ultracapacitors are powering more than 4,500 hybrid transit buses currently in service worldwide, and are being employed in several other transportation applications, including a stop-start idle elimination system developed by Continental AG for micro hybrid diesel automobiles now being produced by PSA Peugeot Citroën in Europe.

Unlike batteries, which produce and store energy by means of a chemical reaction, ultracapacitors store energy in an electric field. This electrostatic energy storage mechanism enables ultracapacitors to charge and discharge in as little as fractions of a second, perform normally over a broad temperature range (-40 to +65°C), operate reliably through one million or more charge/discharge cycles and resist shock and vibration, according to the company.

Maxwell offers ultracapacitor cells ranging in capacitance from one to 3,000 farads and multi-cell modules ranging from 16 to 125 volts.

 

View comments or post a comment on this story. (0 Comments)

More News

MBTA improves real-time information for subway service

Using more sophisticated data to generate better predictions, and train arrival times are now refreshed every six seconds.

Charlotte's new light rail extension increases rail ridership by 48%

With the opening of the extension, the LYNX Blue Line now connects one side of Charlotte to the other.

Report suggests merging LIRR, NJ Transit, and Metro-North

The "Trans-Regional Express," or "T-REX," would connect the systems to greatly cut travel times and increase capacity on rail lines that will only see more strain as the area's population grows.

Retlif Testing Laboratories celebrating 40 years

A globally recognized testing industry leader, the company expanded from humble beginnings at Flowerfield (St. James, N.Y.) to multiple locations, including its state-of-the-industry HQ and testing facility in Ronkonkoma, N.Y

Gannett Fleming/WSP JV to manage N.C. light rail construction

The 17.7-mile light -rail system will have 18 stations between UNC Hospitals in Chapel Hill and North Carolina Central University in Durham.

See More News

Post a Comment

Post Comment

Comments (0)

More From The World's Largest Fleet Publisher

Automotive Fleet

The Car and truck fleet and leasing management magazine

Business Fleet

managing 10-50 company vehicles

Fleet Financials

Executive vehicle management

Government Fleet

managing public sector vehicles & equipment

TruckingInfo.com

THE COMMERCIAL TRUCK INDUSTRY’S MOST IN-DEPTH INFORMATION SOURCE

Work Truck Magazine

The number 1 resource for vocational truck fleets

Schoolbus Fleet

Serving school transportation professionals in the U.S. and Canada

LCT Magazine

Global Resource For Limousine and Bus Transportation

Please sign in or register to .    Close