Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Energy transmission for railroad vehicles without overhead wires

30.06.2014

Induction instead of overhead wires

Anyone who frequently uses trains knows this to be true: overhead lines are prone to faults, increasingly leading to delays and cancellations. An alternative to this is energy transmission without overhead lines.

In the framework of the Allianz DLR@Uni-Stuttgart, scientists from two institutes at the University of Stuttgart as well as the German Aerospace Centre (DLR) are researching inductive (contact-free) systems that are to replace the overhead lines one day.

For this purpose the State of Baden-Württemberg has set aside 860,000 Euros. “With these funds the state government is supporting the researchers at DLR and the University of Stuttgart in exploiting the enormous potentials of contact-free energy transmission for fewer noise emissions, less wear and tear and maintenance work and less energy consumption“, explained the Finance and Economy Minister Nils Schmid on the occasion of the presentation of the research report. As the next step the scientists want to develop a demonstrator that will undoubtedly also be of interest for the industry.

... more about:
»DLR »Electrical »Energy »Machine »Vehicle »existing »railroad »vehicles

Overhead lines for electrically operated railroad vehicles are exposed to the weather and other environmental influences that could lead to a high degree of wear and tear and pose a risk for the environment in the case of damage. In addition the lines and pantographs are a significant source of noise and the high aerodynamic air resistance has a significant impact on the energy consumption.

Induction instead of overhead lines is therefore the goal of the project for which the DLR Institute for Vehicle Concepts has joined forces with the Institutes of Electrical Energy Conversion (IEW) and Machine Elements (IMA, railroad vehicle technology and reliability technology divisions) at the University of Stuttgart. The scientists are thereby relying on a principle according to which electric cars and trams can already be charged contact-free with limited transmission power.

Its mode of operation corresponds to that of a sliced transformer, whereby the primary coil is integrated in the drive and the secondary coil is located in the vehicle. The energy transfer is done via a generated magnetic field and is possible over the complete length of the vehicle on a large scale. In this respect each part segment of long trains with a distributed driving power can be supplied separately with energy without an elaborate energy supply line through the vehicle being necessary. Through this each carriage that has its own drive can for example be moved autonomously in the shunting area.

Whilst the IMA dedicated itself in particular to the mechanical design and the integration of the new components in the vehicle as well as the reliability and availability of the energy transfer, the IEW was particularly involved with the design of the energy transfer system as well as the supply electronics and the electrical components. No wear and tear, less susceptibility to faults and as high an efficiency factor as possible (over 90 percent) and also with far more efficiency were thereby of primary interest. Moreover, attention was paid to maintaining a downward compatibility with existing rail systems as far as possible and to continuing to improve train control systems.

“The inductive energy transfer developed in this interdisciplinary project enables an efficient and robust supply of railroad vehicles with electrical energy“, is how Prof. Johann-Dietrich Wörner, Chairman of the Board of the German Aerospace Centre (DLR) expressed it. An essential viewpoint is that the railroad vehicles through a hybrid energy supply can be driven on new routes as well as on the existing railroad network.“

Further information
Prof. Bernd Bertsche, University of Stuttgart, Institute for Machine Elements, Reliability Technology Division, Tel.: 0711/685-66165, Email: bernd.bertsche (at) ima.uni-stuttgart.de
Prof. Dieter Bögle, University of Stuttgart, Institute for Machine Elements, Railroad Vehicle Technology Division, Tel. 0711/685-66098, Email: dieter.boegle (at) ima.uni-stuttgart.de
Prof. Nejila Parspour, University of Stuttgart, Institute of Electrical Energy Conversion, Tel.:0711/685-67818, Email: nejila.parspours (at) iew.uni-stuttart.de
Dr. Joachim Winter, DLR-Institute for Vehicle Concepts, Project Manager of the project “Energy transfer without overhead lines“, Tel: 0711/6862-274, Email: joachim.winter (at) dlr.de.

Andrea Mayer-Grenu | idw - Informationsdienst Wissenschaft

Further reports about: DLR Electrical Energy Machine Vehicle existing railroad vehicles

More articles from Power and Electrical Engineering:

nachricht New high energy density automotive battery system from Fraunhofer IISB and international partners
25.08.2015 | Fraunhofer-Gesellschaft

nachricht New research may enhance display & LED lighting technology
10.08.2015 | University of Illinois College of Engineering

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: OU astrophysicist and collaborators find supermassive black holes in quasar nearest Earth

A University of Oklahoma astrophysicist and his Chinese collaborator have found two supermassive black holes in Markarian 231, the nearest quasar to Earth, using observations from NASA's Hubble Space Telescope.

The discovery of two supermassive black holes--one larger one and a second, smaller one--are evidence of a binary black hole and suggests that supermassive...

Im Focus: What would a tsunami in the Mediterranean look like?

A team of European researchers have developed a model to simulate the impact of tsunamis generated by earthquakes and applied it to the Eastern Mediterranean. The results show how tsunami waves could hit and inundate coastal areas in southern Italy and Greece. The study is published today (27 August) in Ocean Science, an open access journal of the European Geosciences Union (EGU).

Though not as frequent as in the Pacific and Indian oceans, tsunamis also occur in the Mediterranean, mainly due to earthquakes generated when the African...

Im Focus: Self-healing landscape: landslides after earthquake

In mountainous regions earthquakes often cause strong landslides, which can be exacerbated by heavy rain. However, after an initial increase, the frequency of these mass wasting events, often enormous and dangerous, declines, in fact independently of meteorological events and aftershocks.

These new findings are presented by a German-Franco-Japanese team of geoscientists in the current issue of the journal Geology, under the lead of the GFZ...

Im Focus: FIC Proteins Send Bacteria Into Hibernation

Bacteria do not cease to amaze us with their survival strategies. A research team from the University of Basel's Biozentrum has now discovered how bacteria enter a sleep mode using a so-called FIC toxin. In the current issue of “Cell Reports”, the scientists describe the mechanism of action and also explain why their discovery provides new insights into the evolution of pathogens.

For many poisons there are antidotes which neutralize their toxic effect. Toxin-antitoxin systems in bacteria work in a similar manner: As long as a cell...

Im Focus: Fraunhofer IPA develops prototype of intelligent care cart

It comes when called, bringing care utensils with it and recording how they are used: Fraunhofer IPA is developing an intelligent care cart that provides care staff with physical and informational support in their day-to-day work. The scientists at Fraunhofer IPA have now completed a first prototype. In doing so, they are continuing in their efforts to improve working conditions in the care sector and are developing solutions designed to address the challenges of demographic change.

Technical assistance systems can improve the difficult working conditions in residential nursing homes and hospitals by helping the staff in their work and...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Networking conference in Heidelberg for outstanding mathematicians and computer scientists

20.08.2015 | Event News

Scientists meet in Münster for the world’s largest Chitin und Chitosan Conference

20.08.2015 | Event News

Large agribusiness management strategies

19.08.2015 | Event News

 
Latest News

A Barcode For Shredding Junk RNA

28.08.2015 | Life Sciences

OU astrophysicist and collaborators find supermassive black holes in quasar nearest Earth

28.08.2015 | Physics and Astronomy

Two satellites see newborn Tropical Storm Jimena consolidating

28.08.2015 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>