World's first demonstration of power transfer from wheels to power an electric car

Dec 05, 2012

Electric vehicles (EV) have ten times higher energy performance than automobiles powered by gasoline-based engines. However, they are not yet popular with drivers due to the need to store large batteries onboard. Now, Takashi Ohira and colleagues are developing an innovative method for powering EVs that drastically reduces the number of batteries.

(EV) have ten times higher energy performance than automobiles powered by gasoline-based engines. EVs show tremendous potential as an effective solution to both and global warming.

However, conventional battery-based EVs are not popular with drivers because of drawbacks including: (1) short cruising range; (2) long time to recharge; and (3) high cost. Now, assuming that these drawbacks stem from the need to store large batteries onboard cars, then there are strong demands for alternatives means of powering . In a novel approach, Takashi Ohira at Toyohashi University of Technology and colleagues are developing an innovative method for powering EVs that drastically reduces the number of batteries.

The approach exploits the steel belt usually embedded in rubber tires. The steel belt collects power excited from a pair of buried beneath the . And, since the steel belt is electrically insulated by the rubber tread, the researchers used a displacement current at high frequency to penetrate from underground to the steel belt.

The researchers constructed a 1/32 scale EV to proof their concept for the electric car. The car moved successfully with a power penetration efficiency exceeding 75% at 52 MHz. This is the world-first demonstration of electric power transfer via the car-wheel to the vehicle.

"If the scheme is applied into practice, we believe it would enable a tremendous extension of the EV cruising range," says Ohira.

Explore further: Intel wireless charging in a bowl coming sooner than later

More information: Suzuki, Y et al., Dielectric Coupling from Electrified Roadway to Steel-Belt Tires Characterized for Miniature Model Car Running Demonstration. IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission, IMWS-IWPT2012, pp.35-38 (2012). (DOI): 10.1109/IMWS.2012.6215814

Provided by Toyohashi University of Technology

4.4 /5 (8 votes)
add to favorites email to friend print save as pdf

Related Stories

Japanese scientists explore electric roads for EVs

Sep 20, 2011

(PhysOrg.com) -- Masahiro Hanazawa of Toyota Central R&D Labs and Takashi Ohira from Toyohashi University are working on a solution for avoiding battery recharge headaches in powering electric cars. They are ...

Japan demo shows electricity entering EV through tires

Jul 08, 2012

(Phys.org) -- Electric vehicles' future continues to tease scientists to devise promising and practical ideas to keep these cars moving along the highways without having to pull over and wait for a battery ...

Qualcomm's HaloIPT tech brings wireless charging for EVs

Jan 16, 2012

(PhysOrg.com) -- Qualcomm has demonstrated its new wireless power transmission system for electric vehicles (EVs) at the Consumer Electronics Show (CES). The system, including one pad for power transmitting, ...

More myths busted about electric cars

Apr 27, 2010

I recently went to Finland to drive the all-electric Think City plug-in car (thinkev.com), which is already on European roads and coming to the U.S. later this year. To help it have a soft landing, Think CEO ...

Antonov creates a 3-speed transmission for electric cars

Jul 05, 2011

(PhysOrg.com) -- There are a surprising number of designs out there for electric cars. Most of the design innovations are about creating a more efficient design. While this has meant, for the most part, that ...

SIM-Drive Corp announces new 'in-wheel' electric car

Apr 01, 2011

(PhysOrg.com) -- SIM-Drive Corporation, a Japanese consortium based in Kawasaki-shi and comprised of 34 companies and municipalities, has announced that it has developed a functioning electric car based on ...

Recommended for you

Team improves solar-cell efficiency

Sep 19, 2014

New light has been shed on solar power generation using devices made with polymers, thanks to a collaboration between scientists in the University of Chicago's chemistry department, the Institute for Molecular ...

Calif. teachers fund to boost clean energy bets

Sep 19, 2014

The California State Teachers' Retirement System says it plans to increase its investments in clean energy and technology to $3.7 billion, from $1.4 billion, over the next five years.

Idealistic Norwegian sun trappers

Sep 19, 2014

The typical Norwegian owner of a solar heating system is a resourceful man in his mid-fifties. He is technically skilled, interested in energy systems, and wants to save money and protect the environment.

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

Lord_jag
not rated yet Dec 07, 2012
Okay so how do you meter the amount of power used by drivers?