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 boomIt 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 systemExcavations by 2030. This type of road should be extended in the country, aiming to electrify up to 2,000 km of tracks by 2030.
It may also give ideas to others, although the charging systems tried from Earth are essentially induction. At the beginning of the year, the groupThus, it announced that it was in the process of testing an advanced transmission technology in Italy Wireless and inductive for , 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,It also released its own wireless charging solution when it’s on, for 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 fromOn 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 quittingfor transportation. To meet this ambitious challenge, the country will significantly accelerate its adoption . And to make it easier , the battery charging infrastructure must not only be dense, but also complementary. From this perspective, what was presented as the first was opened In the world designed to charge electric cars while they are in motion.
That 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 It only spreads when the rail is detected. And if the driver is forced to overtake or in the event of The 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 eurosin energy The 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 forThe autonomy of electric cars. The idea is relatively simple: can’t we send permanently Cross-roads, in particular thanks to the induction system? The first tests are crucial anyway.
most of theThe current suffers from low autonomy and above all from a 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 Thus through , but how do we do that? The first part of the answer was given last year by and Takashi Ohira of Toyohashi University of Technology ( ). During a workshop organized in Kyoto, they showed that it is possible to transmit between two metal plates traversed by currents in opposite directions and specially adapted tires (specially attached to parts of included inside and the ). 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 (on an electrified road).
Transmission of electricity through concrete
His developments presented in the magazinerevealed on July 5 and 6, 2012 during Wireless Technology Park 2012 ( ), gallery displays the latest . The demonstration speaks for itself. Two full-size frames were placed at a distance of 10 cm. (Used in Japan in ), placed itself on the plates of traversed by a stream. a Then it was attached to the two wheels and…it started to glow.
Wireless transmission of electricity is particularly dependent on the use of. Conductive elements passing a current (for example, sheet metal equipped with suitable devices) are surrounded by a . 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 butSent by the device must be multiplied by 100 before the car can drive on highways without performing …