• Jun 5, 2013
Public bus systems have changed quite a bit in the past few decades.

In addition to greener powertrains, increasingly popular bus rapid transit lines run more efficiently and often offer "smart," user-friendly features like onboard Wi-Fi and location sharing services.

Public bus systems have changed quite a bit in the past few decades.

In addition to greener powertrains, increasingly popular bus rapid transit lines run more efficiently and often offer "smart," user-friendly features like onboard Wi-Fi and location sharing services.

Now, thanks to Swiss automation technology group ABB, buses are evolving again.

The Trolleybus Optimisation Système Alimentation, known as TOSA for short, is an electric bus system pilot program in Geneva, Switzerland. Using a new technology called flash charging, the 135 passenger electric buses can charge for fifteen seconds during loading and unloading, providing enough juice to make it from one stop to the next. At the end of the line, the buses recharge for an additional three to four minutes to bring battery range back to full.

The chargers use hydro-powered electricity to charge the buses, meaning that the electricity is completely carbon-emission free. The flash chargers also eliminate the need for overhead power cables that electric street cars of the past relied on, making route changes much easier. And, best of all, the quick charging doesn't interfere with the current bus schedule.

"Through flash charging, we are able to pilot a new generation of electric buses for urban mass transport," says ABB's CTO Claes Rytoft. "This project will pave the way for switching to more flexible, cost-effective, public transport infrastructure while reducing pollution and noise."

Don't expect to see these buses around your neighborhood any time soon. For now the buses only operate a route between the Geneva Airport and Palexpo, Geneva's convention center, but it is a step in the right direction.
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ABB demonstrates technology to power flash charging electric bus in 15 seconds

No overhead lines and ultrafast charging times at selected bus stops enables new opportunities for next generation silent, flexible, zero-emissions urban mass transportation.

Zurich, May 30, 2013 - ABB, the leading power and automation technology group has developed a new technology that will help power the world's first high-capacity flash charging electric bus system.

ABB announced at the 60th congress of the International Association of Public Transport (UTIP) in Geneva that it is working together with the city's public transport company (TGP), the Office for the Promotion of Industries and Technologies (OPI) and the Geneva power utility SIG on the TOSA electric bus system pilot project.

The new boost charging technology will be deployed for the first time on a large capacity electric bus, carrying as many as 135 passengers. The bus will be charged directly at selected stops with a 15-second energy boost while the passengers enter and leave the bus, based on a new type of automatic flash-charging mechanism. The pilot project runs between Geneva airport and the city's international exhibition center, Palexpo.

"Through flash charging, we are able to pilot a new generation of electric buses for urban mass transport that no longer relies on overhead lines," said Claes Rytoft, ABB's acting Chief Technology Officer. "This project will pave the way for switching to more flexible, cost-effective, public transport infrastructure while reducing pollution and noise."

TOSA (Trolleybus Optimisation Système Alimentation) is a zero-carbon-emission solution as the electricity used comes entirely from clean hydro power. The charging time is so quick that it does not interfere with the bus schedule and improves the urban environment and landscape as it does not need overhead lines while providing greater route flexibility. The system uses a laser-controlled moving arm, which connects to an overhead receptacle for charging at bus shelters, instead of the usual trolley poles to overhead lines.

The flash-charging technology and the onboard traction equipment used in this project were developed by ABB and optimized for high-frequency bus routes in key urban areas, carrying large numbers of passengers at peak times. Onboard batteries can be charged in 15 seconds with a 400 kilowatt boost at selected stops. At the end of the bus line a 3 to 4 minute boost enables the full recharge of the batteries. Thanks to an innovative electrical drive system, energy from the roof-mounted charging equipment can be stored in compact batteries, along with the vehicle's braking energy, powering both the bus and its auxiliary services, such as interior lighting.

For more information on electric vehicle charging click here.
ABB (www.abb.com) is a leader in power and automation technologies that enable utility and industry customers to improve their performance while lowering environmental impact. The ABB Group of companies operates in around 100 countries and employs about 145,000 people.

For help with any technical terms in this release, please go to: www.abb.com/glossary


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