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Feb 19, 2013 NEWSwire
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PHOTO CAPTION: Viseon bus prototype powered by Bombardier wireless PRIMOVEcharging system.

German Transit Operator Will Trial Wireless E-Bus Charging

During an initial period of 12 months, two completely electrically powered and inductively charged electric buses will be trialled in daily passenger operation on the existing RNV bus route.

Published: 19-Feb-2013

The regional operator Rhein-Neckar-Verkehr GmbH (RNV) is redefining e-mobility for public transport services of the future. During the "PRIMOVE Mannheim" research project, electric buses will recharge wirelessly while passengers get on and off the vehicles at bus stops along the inner city route 63. The project will prove that electric buses can operate daily passenger services, even on demanding routes.

Germany's Federal Ministry of Transport, Building and Urban Development announced today - during the Association of German Transport Companies' conference in Berlin on the theme of "Electric Buses - Market of the future!?" - that it will fund the project with 3.3 million euro. Secretary of State Rainer Bomba presented the grant for this innovative project to Christian Specht, Mayor of Mannheim and head of the city's department of public transport, and Martin in der Beek, Technical Director, RNV. They accepted the funding on behalf of the four project partners RNV, the City of Mannheim, Bombardier Transportation and the Karlsruhe Institute of Technology.

"The Government considers the promotion of alternative propulsion technologies a high priority," Rainer Bomba told the conference. "We want to turn Germany into a leading e-mobility supplier and market. The Ministry of Transport's wide-ranging approach to R&D supports the introduction into the market of innovative drive systems and new concepts for all modes of transport. It is particularly important to harness the benefits of e-mobility in public transport, where new technologies are tested in an integrated system of vehicles, transport infrastructure and maintenance sites. Our research and pilot projects are setting in motion today the solutions of tomorrow."

During an initial period of 12 months, two completely electrically powered and inductively charged electric buses will be trialled in daily passenger operation on the existing RNV bus route. Both e-buses, built by the Swiss manufacturer Carrosserie HESS AG, are also equipped with the new BOMBARDIER MITRAC e-bus powertrain for city buses. In addition, an electric van equipped with wireless PRIMOVE technology will be tested as a RNV service vehicle.

The project will help to determine a framework for infrastructure, batteries, inductive energy transfer and daily operation by testing the new technology on a real-life route. The project partners aim to prove that a technology transfer towards e-mobility is viable. They will also gain insights into further improving low-emission public transport systems by focusing on the operating efficiency of daily transport services.

Martin in der Beek emphasised RNV's dedication to implementing innovative transport solutions: "We aim to expand public transport's competitive edge in efficiency by putting the technology of inductively charged electric buses through its paces on a demanding city route and thereby proving its suitability for everyday use." RNV GmbH was the first transport operator to use energy storage systems on its rail network; since 2009, light rail vehicles equipped with the MITRAC Energy Saver are operating successfully in the region. The use of PRIMOVE technology widens RNV's commitment to efficient e-mobility to roads as well.

Bombardier's invisible PRIMOVE charging technology is based on inductive energy transfer. It is installed entirely under the road surface and under the floor of the vehicles. The charging process begins as soon as the vehicle completely covers the charging segment. Jérémie Desjardins, Business Leader PRIMOVE, Bombardier Transportation, said: "PRIMOVE technology enables electric buses to serve routes originally designed for conventional buses operating to tight timetables. It fully integrates the charging process into normal bus operations so you don't need more vehicles than with current diesel bus fleets. We combine smaller, lighter batteries with the principle of fast opportunity charging to produce enough energy for a whole day's travel and increase the batteries' lifespan considerably."

The project partners will initially test the PRIMOVE technology during a testing and approval phase to collect information for the subsequent scheduled passenger operations, as well as for RNV's internal operations and its training of personnel. Innovative features of the project include the planned optimisation of the charging process by evaluating real-time data on the vehicle's position on the route and its battery's level of charging.

Public relations and civic participation initiatives will involve passengers and residents of the city of Mannheim in the PRIMOVE trial. Christian Specht outlined the city's task: "We want to find out how people perceive and rate the advantages of electric buses and the new wireless charging system. By doing so, we are paving the way to introduce CO2-free and low-noise e-mobility to other routes in Mannheim and the Rhine-Neckar metropolitan region."

The Karlsruhe Institute of Technology's department for vehicle systems technology will provide the project with scientific support under the direction of Prof. Dr.-Ing. Peter Gratzfeld. The research will focus on an energy simulation that demonstrates the entire power flow in the electric buses and at the inductive charging stations. This will allow the battery size and the charging infrastructure to be perfectly adapted to each other and determine the demands on the power supply network. The institute's work will also confirm the greater energy efficiency of the system compared to conventional propulsion methods. An extensive measurement programme will verify the results of the simulations when the electric vehicles enter passenger service.

Andreas Kerber, Commercial Director, RNV, added: "We will gain not just technical insights from this project but also important information concerning competitiveness and acceptance levels from our customers. This will enable us to develop our bus division for the future."

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