Korea Advanced Institute of Science and Technology has
established an Online Electric Vehicle (OLEV) system. It is an electric
vehicle which is provided energy by the road while stationary or moving.
The power is supplied to such electric vehicles by the cables fixed in
the road. A permanent direct connection is not needed by these cables in
order to charge the vehicle. As an alternative, a magnetic field is
created which is converted into electrical energy by the devices carried
on the bus. Lots of components that are present in almost every
electric vehicle currently, for instance, heavy batteries, overhead
trolley lines are left out due to this particular feature. In addition
to this, these busses are not required to stop for recharging. The
limited range is a drawback of these vehicles as they cannot ride on the
side of the road that supports them.
The bus will be given 20 kHz and 100 kW (136 horsepower) electricity at
an 85% maximum power transmission efficiency while keeping a distance of
17cm (6.7 inch) between the bus floor and the asphalt. 5% to 15% of the
entire road surface needs to be rebuilt with the embedded cables. Formerly, this technology was successfully tested in a tramcar at an
amusement park in Seoul. Now, two OLEV buses are being tested which run
between the train station and In-dong district in the city of Gumi,
South Korea. This network entails 24km (15 miles) of road. The cables in the road only turn on when they sense an OLEV
approaching and the intensity of electromagnetic field is well within
limits enforced by international EMF standards. These features have been
anticipated to lessen the exposure of pedestrians and other vehicles to
the magnetic fields and will also look after the wastage of energy.
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