Technology

ElectroBuses: 15 seconds at bus-stop to reload current

Only a few seconds loading time require the modern Electrobuses, which will soon be used in public transport in Geneva. 23 line stops are equipped with super fast Flash charging stations, where the buses refuel energy, while the passengers in and out. Swiss developers of the technology expect less carbon dioxide for line 23 with 1,000 tons in the year.

The diesel buses that run on the line 23 in Geneva between airport and suburbs are disused. By the year 2018, they should completely by twelve Electrobuses with an ingenious quick charging system called TOSA (trolleybus optimisation systems feeding) be replaced.

The technology was developed by engineers of the Zurich company figure It allows to load the buses during their brief stop at an accordingly equipped bus stop so far that they can then easily make it to the next charging station.

Automatic fast-charging contact

And it looks like this: the almost 20 m-long articulated bus with maximum 133 passengers will stop under a Flash charging station stop. Automatically straightens up a mobile arm of loading on the roof of the bus and connects to the contact the Flash charging station. While passengers hop on and off, the onboard batteries within 15 seconds with 600 kilowatts will be downloaded, so that the bus has enough power for the onward journey to the nearest charging station.

Photo: ElectroBuses
Electric Spark in 15 sec. loading power into batteries. Photo: ElectroBuses

Fully charged the on-board batteries are then in four to five minutes at the station. In Berlin, the Inductive charging system was last year Primove by Bombardier tested. Thereby, a current transducer descends under the bus just over the ground. The charger then transmits the energy through a magnetic field and ensures energy supply at the station in seven minutes.

ElectroBuses
Photo: ElectroBuses

The public Geneva transit authority TPG (Transports Publics Genevois) and the Swiss bus manufacturer HESS hired the company ABB with supply and conversion of the line 23. An electric bus between Geneva airport and the Palexpo Exhibition Centre was been used in a pilot project. It is planned now, easy to customize the route of the bus line 23 to allow a quick connection to Praille-Acacias-Vernet. This new quarter of Geneva will host upon completion for approximately 11,000 employees 11,000 apartments and office space.

10,000 passengers per day

The full commissioning of the bus line is planned for the year 2018. Then, the articulated buses should run to peak times in both directions at ten minute intervals, and carrying more than 10,000 passengers a day.

13 of the 50 bus stops on the route of the line 23 are equipped with Flash-charging stations, three charging stations on station and four in the depot. The stations are equipped with the device for the transfer of energy and an energy storage unit with power supply and AC/DC converter.

The equipment for the twelve buses consists of depending on an energy transfer system with movable loading boom on the roof as well as the battery unit. Which is coupled to a converter that regulates the electrical drive of the buses. ABB delivers the twelve flexible drive solutions for buses, including integrated traction and help converters, roof-mounted batteries and energy transmission systems and permanent magnet motors.

The total value of the contracts for the construction of low-emission and low-noise commuter line 23 amounted to approximately 16 million Swiss francs. For 1,000 tonnes of CO2 are saved on the approximately 600,000 kilometers on the line per year, according to ABB.

Autonomous Electrobuses

Daimler will start next year with the serial production of autonomously moving electric bus. The city bus was tested by Mercedes in the real traffic from Amsterdam Schiphol Airport and the city of Harlem. We reported. The first duration test of an autonomous person transport in public space runs in the Swiss canton of Valais. Protagonist is ARMA a small yellow electric bus of the French manufacturer of Navya. He drives passengers on behalf of Swiss Post AG through the old town of Sion to the train station. The autonomous vehicle has eleven seats and reaches a top speed of 20 km/h.