We already charge our toothbrushes and cellphones using contactless technology. Researchers have developed a particularly efficient and cost-effective method that means electric cars could soon follow suit.
Cables are fast disappearing from our daily lives. The computer mouse has already lost its tail, our telephones and headphones have become wireless – even electric toothbrushes and cellphones don’t need cables anymore. Information is transmitted wirelessly, and power needs can be met via an electromagnetic induction supply system. Researchers are in the process of developing wireless charging technology for electric vehicles, too. “Cables are annoying, especially in winter or when it’s raining. Whatever gets on the cable – snow, sludge, water – also gets on your hands,” says Dr. Bernd Eckardt, head of the Vehicle Power Electronics department at the Fraunhofer Institute for Integrated Systems and Device Technology IISB in Erlangen, Germany. Dr. Eckardt knows what he’s talking about, because he drives an electric car himself. It would be much more convenient to charge these plug-in vehicles remotely with contactless technology. And it’s possible. The way to do it is using electromagnetic induction, whereby electrical energy is transferred over the air between two objects via an electromagnetic field. Dr. Eckardt explains the physics behind it as follows: “Any wire that carries a current generates a magnetic field. As the English physicist Michael Faraday demonstrated in the 19th century, this magnetic field generates voltage or electromotive force as well. By correctly positioning two wires in relation to one another inside a magnetic field, it is possible to transmit energy over the air. In principle this works just like a transected transformer.” Familiar examples of products that use this kind of energy transfer include charging stations for electric toothbrushes and smartphones, and induction hobs.
Researchers from the scientific and industrial communities have been working for several years to find ways to use induction to charge electric vehicles. The current approach involves mounting induction coils on the underside of the vehicle and installing charging stations in the ground. But this brings with it a number of significant challenges. The coils need to be very powerful for the method to work because of the significant gap of up to 15 cm between car and ground. Powerful coils are large in size – and large coils are expensive, which pushes up costs. There is also the problem of objects or animals impeding the charging process by blocking the transmission of power. Cats, for example, are attracted by the gentle warmth emitted from the charging station in the ground, and so see this as a comfortable resting place. Another particularly problematic issue is that metallic paper such as chewing-gum wrappers or cigarette packaging can blow under the car and into the induction zone, where it can get so hot that it bursts into flame.
Researchers at the IISB began pursuing an alternative approach in a bid to resolve these problems. Working as part of the Energie Campus Nürnberg research platform it took them less than a year to develop a system for charging electric vehicles from the front end (http://www.encn.de). Since this allows the car to be driven much closer to the induction source – essentially touching it – the coils themselves are much smaller in diameter than in the floor-based version, coming in at 10 instead of 80 cm across. The system is more efficient, more cost-effective and makes it less probable that obstacles will disrupt the flow of energy.
Read more . . .
The Latest on: Wireless charging
[google_news title=”” keyword=”Wireless charging” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Wireless charging
- Galvion introduces BATLCHRG for seamless wireless charging in special operationson May 9, 2024 at 1:39 pm
Galvion unveiled the BATLCHARG wireless charging system at SOF Week, designed for special operations forces to recharge gear on the move or while stationary, enhancing battlefield power management efficiency.
- This combination laptop dock, monitor stand and wireless charger has every port under the sun — and it's $50 off right nowon May 9, 2024 at 9:46 am
Give your work setup the ultimate upgrade with Anker's 12-in-1 laptop dock and monitor stand on sale for just $199 at Amazon.
- Google needs to make a budget Pixel phoneon May 9, 2024 at 12:06 am
Google needs to make a sub-$350 Pixel phone to challenge Samsung and Xiaomi. There's only one problem — it doesn't want to do that.
- What is the role in promoting VN88 Rezence wireless charging adoption?on May 5, 2024 at 9:45 pm
VN88 Rezence is committed to developing sustainable and eco-friendly wireless charging solutions that minimize environmental impact and promote responsible consumption. By focusing on energy efficiency, recyclability, and product longevity, VN88 Rezence aims to contribute to a more sustainable future for the electronics industry.
via Bing News