Arlanda Road, the road that charges electric cars, charts its course

Imagine vehicles connected to electric rails placed in the middle of traffic lanes and thus easily recharged, just by driving. This is exactly the concept of eRoadArlanda, a purpose-built two kilometer stretch in Sweden that has been tested since 2018.

To be able to recharge while driving, vehicles must be equipped with some kind of pad placed at the end of the boom cell phone It is attached to the bottom of the chassis, which is automatically attached to the rails arranged in its track. Initially, this system is being tested on trucks, but of course the idea is to be able to adapt it to buses and electric cars. The boom actually senses when the vehicle is over the rail and then anchors there automatically. Likewise, in the event of a lane change or overtaking, it “cuts off” without any action by the driver.

This project is part of the Swedish government’s plan to create an entire transportation system fuel Excavations by 2030. This type of road should be extended in the country, aiming to electrify up to 2,000 km of tracks by 2030.

Simulated solution

It may also give ideas to others, although the charging systems tried from Earth are essentially induction. At the beginning of the year, the group Stilants Thus, it announced that it was in the process of testing an advanced transmission technology in Italyenergy Wireless and inductive for electric cars, in a circuit created specifically for this type of test. In this case, it foreshadows the type of infrastructure that can equip certain roads in the future, making it possible to obtain a great deal of autonomy. It is actually a technology that relies on a series of rings placed under the asphalt that transmits energy directly to the vehicles traveling on top of it. However, each vehicle must be equipped with a dedicated receiver, which is responsible for transmitting power from the road infrastructure directly to the electric motor. According to the same principle, in Karlsruhe, Germany, an entire stretch of road, a few hundred meters, will be equipped to power the city’s electric buses as they drive.

For its part, the Spanish company Premium PSU revealed a completely new system that aims to recharge its car by placing itself directly on a dedicated station, knowing that this system works with both the stationary and the moving vehicle. Note that in 2018, BMW It also released its own wireless charging solution when it’s on, for Electric Hybrid Vehicles from the brand. By induction or with the help of a sled, the solution to enhancing the autonomy of electric cars may one day pass the same road.

E-road Arlanda, the first road to charge electric cars

Article from Mark Zvani On 04/16/2018

Sweden has just opened a two-kilometre road that includes a system for recharging electric cars while driving. Inspired by the tram, this device will be tested for two years in real conditions.

In 2030, Sweden has set itself the goal of quittingFossil fuels for transportation. To meet this ambitious challenge, the country will significantly accelerate its adoption electric car. And to make it easier a movement, the battery charging infrastructure must not only be dense, but also complementary. From this perspective, what was presented as the first was opened electrified road In the world designed to charge electric cars while they are in motion.

Arlanda RoadThat is its name, a two-kilometer stretch consisting of an electrified railroad intertwined with the road in its central part. Vehicles connect to it via a movable contact pad located under the chassis. The latter is managed by sensors It only spreads when the rail is detected. And if the driver is forced to overtake or in the event ofincidentThe slip retracts automatically. Connected to ground, the electrified rail sends current through short sections as the vehicle passes.

Sweden has 20,000 km of roads

This system is derived from that used by some trams, especially in France. The eRoadArlanda site links Stockholm-Arlanda Airport to the Rossberg logistics area outside the capital. Currently, only one PostNord electric truck will use this section during this test, which is scheduled to run for two years.

If successful, the Swedish Transport Administration plans to expand the network to include motorways and major roads. According to eRoadArlanda, the cost of deploying this system over 20,000 km of the Swedish road network will be 7.6 billion euros. But thanks to savings of 3 billion euros annual in energy fossilsThe electric road It will be amortized in just under three years.

Will electric cars be off the road soon?

Initial article by Quentin Muguet, published on 11/07/2012

An original solution is developed in Japan for booster The autonomy of electric cars. The idea is relatively simple: can’t we send permanentlycordless electricity Cross-roads, in particular thanks to the induction system? The first tests are crucial anyway.

most of the electric cars The current suffers from low autonomy and above all from a Time to recharge the balance Very long. So many teams around the world are working to reduce these limiting factors as much as possible. One of the solutions considered would be to provide real-time energy for moving vehicles across roads Thus through Tires, but how do we do that? The first part of the answer was given last year by Toyota Central Research and Development Laboratories and Takashi Ohira of Toyohashi University of Technology (UTU). During a workshop organized in Kyoto, they showed that it is possible to transmitwireless power between two metal plates traversed by currents in opposite directions and specially adapted tires (specially attached to parts ofSolid included inside an eraser and the Capacitors). The amount of energy lost in the rubber was also tested on this occasion. It would be, given the data at that time, less than 20%.

However, installing steel plates on all of our roads can cause many safety and control problems, especially in the event of rain. So improvements have been made to this project, called Ever for Electric Vehicle on Electrified Roadway (electric vehicle on an electrified road).

Transmission of electricity through concrete

His developments presented in the magazine technology onrevealed on July 5 and 6, 2012 during Wireless Technology Park 2012 (WTP), gallery displays the latest wireless technology. The demonstration speaks for itself. Two full-size frames were placed at a distance of 10 cm. Cement (Used in Japan in road construction), placed itself on the plates of metal traversed by a stream. a ampoule Then it was attached to the two wheels and…it started to glow.

Wireless transmission of electricity is particularly dependent on the use of inductive coupling. Conductive elements passing a current (for example, sheet metal equipped with suitable devices) are surrounded by a electromagnetic field. However, it can create an electromotive force when it cuts a second conductor (eg steel in tires). The researchers’ achievement is that they have been able to use this property through concrete, while ensuring that large amounts of energy can be transferred. Electrical power, i.e. the product of current by voltage, was measured from 50 to 60 watts actually at the lamp terminals. According to Takashi Ohira, the efficiency of energy transfer to the tires will again be greater than 80%, and even 90%.

The team will now attempt to increase the thickness of the concrete through which the tires can be streamlined. These developments are very interesting but electric force Sent by the device must be multiplied by 100 before the car can drive on highways without performing Refill stop…