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 Fraunhofer ISE Supports Market Development of Solar Thermal Power Plants in the MENA Region
21.02.2018 | Fraunhofer-Institut für Solare Energiesysteme ISE

nachricht New tech for commercial Lithium-ion batteries finds they can be charged 5 times fast
20.02.2018 | University of Warwick

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: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

MEMS chips get metatlenses

21.02.2018 | Physics and Astronomy

International team publishes roadmap to enhance radioresistance for space colonization

21.02.2018 | Physics and Astronomy

World's first solar fuels reactor for night passes test

21.02.2018 | Earth Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>