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.
The Latest on: Wireless charging
via Google News
The Latest on: Wireless charging
- I tried Marshall’s new wireless touch-responsive earbuds — the truest AirPods Pro competitor that's $70 cheaperon March 4, 2021 at 9:08 pm
When it comes to delivering quality lifestyle tech (Bluetooth speakers, headphones, earbuds and more), there are a handful of brands that shoppers confidently believe will produce worthwhile products.
- Iggy Pop Unveils Marshall’s First-Ever True Wireless Earbudson March 4, 2021 at 7:00 am
Iggy Pop was drafted in to launch Marshall Headphones first-ever pair of true wireless earbuds. The new earbuds are tuned to the project the energy of the original Marshall guitar amps.
- Marshall debuts the $179 Mode II, its first true wireless earbudson March 3, 2021 at 11:00 pm
Iconic guitar amp company Marshall has taken the wraps off its first true wireless earbuds, the $179 Mode II, which boast wireless charging.
- Global Wireless Charging Market 2020 Trend and Opportunities, PESTEL Analysis, CAGR and Value Chain Study to 2025on March 3, 2021 at 5:03 am
The market research report entitled Global Wireless Charging Market 2020 by Manufacturers, Regions, Type and Application, Forecast to 2026 presents a huge platform for different firms, manufacturers, ...
- Moto-branded Wear OS watch shows SD 4100 chipset, wireless chargingon March 2, 2021 at 10:03 pm
Theoretically, this upcoming Moto watch could sport that advanced chip, Wear OS, and wireless charging. So far, there’s only one watch on the market with the SD4100, so this would be a welcome bit of ...
- iPhone 12: Apple Working On A Reverse Wireless Charging Magsafe Battery Pack, Says Insideron March 2, 2021 at 4:03 am
Aside from MagSafe battery packs, an FCC filing in the past shows some iPhone models are in fact capable of reverse wireless charging.
- These Qi wireless charging pads are on clearance for just $5 eachon March 2, 2021 at 12:04 am
One is designed for phones, the other just for AirPods. Plus, super-affordable power adapters, just in case you need one.
- Energous Partners With e-peas to Advance At-a-Distance Wireless Charging Applications Greater Than 1 Meteron February 25, 2021 at 1:17 pm
Energous Corporation (Nasdaq: WATT), the developer of WattUp®, a revolutionary wireless charging 2.0 technology, announced a partnership with e-peas S.A. ("e-peas"), a leading semiconductor company ...
- This nifty wireless charging power bank is only $28 for a limited timeon February 25, 2021 at 6:48 am
Aukey's wireless 10000mAh portable charger with foldable stand is normally $40. But for a limited time it's 30% off.
- Oppo has a rollable phone with true wireless chargingon February 24, 2021 at 2:08 am
Chinese smartphone maker Oppo has always been at the forefront when it comes to charging technology, and the company is proving it once again with a new smartphone that charges completely. The ...
via Bing News