Section Roundtrip Shuttle Operation Roundtrip Shuttle Between Campuses Seoul Shuttle Bus from Main Campus OLEV On-campus Shuttle Commute Bus. electric vehicle being developed at KAIST.2 The all-electric car of KAIST, named the On-Line Electric Vehicle (OLEV),. N.P. Suh (), D.H. Cho, C.T. Rim. KAIST. The Online Electric Vehicle (OLEV), developed by KAIST, is an electric vehicle that can be charged while stationary or driving, thus removing.

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The Online Electric Vehicle OLEV is an electric vehicle that charges wirelessly while moving using electromagnetic induction the wireless transfer of power through magnetic fields.

KAIST’s wireless Online Electric Vehicle, OLEV, runs inner city roads | EurekAlert! Science News

OLEV has a small battery one-third of the size of the battery equipped with a regular electric car. Use dmy dates from May Likewise, an OLEV tram does not require pantographs to feed power from electric wires strung above the tram route.

The wireless transfer system means that batteries in electric vehicles can be reduced in size to about a third of that you would normally expect to find in an electric car. The OLEV bus is an electric vehicle that can be charged while stationary or driving.

KAIST’s wireless Online Electric Vehicle, OLEV, runs inner city roads

Electric buses using the wireless transfer system are not currently competitive with diesel buses in terms of capital costs but they are in terms of total ownership jaist because of the savings on batteries that are possible with this system as well as the low maintenance requirements.

This device, which produces high voltage, high frequency alternating currents, enabled Tesla to transfer power over short distances without interconnecting wires via resonant inductive coupling, the near-field wireless transmission of electrical energy between two magnetically coupled coils.

A trackless train was used as the demonstration vehicle, consisting of a tractor loev with magnetic induction pick-ups and three passenger carriages. However, the U shaped cores also require return cables which bumps up the cost of production.

Online Electric Vehicle – Wikipedia

This in turn should help to improve the take-up of consumer electric vehicles. It functions by using a segmented “recharging” road that induces a current in “pick-up” modules on the vehicle.

The secondary coil uses a thicker variation of the w-shaped cores as a way to make up for the lesser area for the magnetic flux to flow through compared to gen 2. If you continue to use this site, you consent to our use of cookies. The OLEV system is split into two main parts: These tests will have a total duration of about 18 months after which more on-road trials would probably need to be conducted.


To power the primary coils, the cables are attached to the South Korean national power grid through a power inverter. Alongside innovative battery technology, another potential method for charging electric vehicles EVs could be wireless energy transfer strips installed on road surfaces. A wireless parking charge system on display at a motor show [Image source: Tesla had an obsessive interest in the subject which enabled him to develop his Tesla Coil.

Moreover, if the primary and secondary coils are vertically misaligned by a distance over 3mm, the power efficiency drops greatly. IWES found that even when a car is 20 centimeters away from a coil embedded in the road, an efficiency level of between 93 and 95 percent is still achievable across the entire power range from watts to 3.

Wireless energy transfer strips for electric vehicles and buses

Views Read Edit View history. Retrieved from ” https: It takes about 30 minutes for OLEV to fully charge and they can travel for 40 kilometers between charges about 24 miles and that means they could potentially veer off the established charging route on occasion if they needed to. The vehicle complies with the international electromagnetic fields EMF standards of Attached beneath the vehicle, are “pick-up” modules, or the secondary coils, that consist of wide W-shaped ferrite cores with wires wrapped around the center.

By using this site, you agree to the Terms of Use and Privacy Policy. The lower current means a smaller magnetic field and requires the secondary coil to be very close to the floor, which can be an issue while driving. The tests, due to take place off-road at some point either this year or next, will evaluate the potential of the system to help reduce fuel costs, incur minimum impact on road surfaces and reduce environmental impact from road transport including improvements in air quality, reduced noise and lower carbon emissions.

Skip to main content? As seen in the table above, the generation 1 OLEV lacks a realistic margin for error. This design combines the magnetic fields of the two sides of the cables and shapes the fields in a way that maximizes induction.


The potential for new electric vehicles is quite exciting, kaistt with regard to mass transit vehicles such as buses and trams, but the technology could one day be used for EVs also. Overall, the gen 3 OLEV made up for the gen 1’s small margins and gen 2’s increased cost.

In the meantime, at least one city in the UK, Milton Keynes, has already gone ahead with its own wireless transfer system, though this is fairly limited and requires buses to stop for several minutes at a time while charging.

In response to the cost issue of gen 2, the third generation OLEV was developed. Another advantage of this system is that it can also discharge power on to the general power grid.

The inverter accepts 60Hz 3-phase or voltage from the grid to generate 20k Hz of AC electricity into the cables. Wireless transfer was first demonstrated by Nikolai Tesla in The ferrite cores in the primary coils were changed to a U shape and the cores in the secondary coil were changed a flat board shape to pick-up as much flux as possible.

This means that excess energy from the grid could be fed into these cars, using them as energy storage facilities until the power is required when it could be returned to the grid. An expanding bubble in an extra dimension Uppsala University Rerouting nerves during amputation reduces phantom limb pain before it starts MediaSource Proportion of cancers associated with excess body weight varies considerably by state American Cancer Society Reducing drinking could help with smoking cessation, research finds Oregon State University View all latest news.

For other uses, see Olev. Wireless charging in the UK is not without its critics. It involves the transfer of electricity between two magnetically-charged plates, one of them buried in beneath the road or railway and the other slung beneath the chassis of a vehicle. A gap of 6.

Korea unveils ‘recharging road’ for eco-friendly buses”.