Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Electric drive concepts for the cars of the future

20.04.2010
The »Fraunhofer System Research for Electromobility« makes its debut appearance at this year's Hannover Messe (April 19 - 23, Hall 2, Booth D22).

In order to make electric cars a part of everyday life, new vehicle designs and parts are needed. Take wheel hub motors, for instance. One of the advantages of wheel hub motors is that manufacturers can dispense with the conventional engine bay – the space under the »hood« or »bonnet« – since the motors are attached directly to the wheels of the vehicle.


This is the Fraunhofer wheel hub motor on the \"Frecc0\" demo vehicle. Credit: Fraunhofer IFAM

This opens up a wealth of opportunities for car designers when drafting the layout of the vehicle. Additional advantages: By dispensing with the transmission and differential, the mechanical transmission elements suffer no losses or wear and tear. Moreover, the direct drive on each individual wheel may improve the drive dynamic and drive safety.

Researchers are developing not only individual components, but the total system as well. They assemble the components on their concept car, known as the »Frecc0« or the »Fraunhofer E-Concept Car Type 0« – a scientific test platform. Starting next year, automobile manufacturers and suppliers will also be able to use the »Frecc0« for testing new components. The basis of this demo model is an existing car: The new Artega GT manufactured by Artega Automobil GmbH. The establishment of this platform and the engineering of the wheel hub motor are just two projects among the panoply run by »Fraunhofer System Research for Electromobility«.

The research cooperative is focusing on subjects that include vehicle design, energy production, distribution and implementation, energy storage techniques, technical system integration and sociopolitical matters. The federal ministry for education and research BMBF is funding this Fraunhofer initiative with 44 million euro. The goal is to develop prototypes for hybrid and electric vehicles, in order to support the German automotive industry as it makes the crossover to electromobility.

Wheel hub motors were invented back in the 19th century. Ferdinand Porsche used these motors to equip his »Lohner Porsche« at the 1900 World Fair in Paris. Much has been done since then: »We are developing a wheel hub motor that integrates all essential electric and electronic components, especially the power electronics and electronic control systems, into the installation space of the motor. Thus, no external electronics are necessary and the number and scope of the feed lines can be minimized. There is a marked increase in power compared to the wheel hub motors currently available on the market. Moreover, there is an innovative security and redundancy concept, which guarantees drive safety – even if the system breaks down,« explains Professor Matthias Busse, head of the Fraunhofer Institute for Manufacturing Engineering and Applied Materials Research IFAM. Beside IFAM, researchers from the Fraunhofer Institute for Integrated Systems and Device Technology IISB, for Mechanics of Materials IWM and for Structural Durability and System Reliability LBF are tackling these issues.

Critics find fault with the negative effects of wheel hub motors on vehicle handling. Dr. Hermann Pleteit, IFM project manager, responds: »The motor is extremely compact. The high power and torque densities merely cause a relatively low increase in unsprung mass. But by configuring the chassis in different ways – like the muffler settings, for example - you can compensate for these effects. There is no impact on drive comfort.«

The researchers are meeting yet another challenge: In contrast to conventional vehicles, electric cars can recapture the energy that comes from braking, and feed it back into the battery. In this case, the experts refer to »recuperation«. Now they are working on maximizing this energy recapture in the future. The conventional braking system still in use will only be needed in emergency situations.

With the Fraunhofer wheel hub motor, the researchers are implementing Ferdinand Porsche's idea for the cars of the future, and testing these components on the demonstration vehicle.

Felix Horch | EurekAlert!
Further information:
http://www.ifam.fraunhofer.de
http://www.ifam.fraunhofer.de/index.php?seite=&lang=en

More articles from Automotive Engineering:

nachricht Two intelligent vehicles are better than one
04.10.2017 | Ecole Polytechnique Fédérale de Lausanne

nachricht The Future of Mobility: tomorrow’s ways of getting from A to B
07.09.2017 | Fraunhofer-Institut für Angewandte Informationstechnik FIT

All articles from Automotive Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Terahertz spectroscopy goes nano

20.10.2017 | Information Technology

Strange but true: Turning a material upside down can sometimes make it softer

20.10.2017 | Materials Sciences

NRL clarifies valley polarization for electronic and optoelectronic technologies

20.10.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>