Highway “stations” that can recharge electric vehicles wirelessly as the vehicles drive by
Researchers from North Carolina State University have developed new technology and techniques for transmitting power wirelessly from a stationary source to a mobile receiver – moving engineers closer to their goal of creating highway “stations” that can recharge electric vehicles wirelessly as the vehicles drive by.
“We’ve made changes to both the receiver and the transmitter in order to make wireless energy transfer safer and more efficient,” says Dr. Srdjan Lukic, an assistant professor of electrical engineering at NC State and senior author of a paper on the research.
The researchers developed a series of segmented transmitter coils, each of which broadcasts a low-level electromagnetic field. The researchers also created a receiver coil that is the same size as each of the transmitter coils, and which can be placed in a car or other mobile platform. The size of the coils is important, because coils of the same size transfer energy more efficiently.
The researchers modified the receiver so that when it comes into range and couples with a transmitter coil, that specific transmitter coil automatically increases its current – boosting its magnetic field strength and the related transfer of energy by 400 percent. The transmitter coil’s current returns to normal levels when the receiver passes out of the range of the transmitter.
These modifications improve on previous mobile, wireless power transfer techniques.
One previous approach was to use large transmitter coils. But this approach created a powerful and imprecise field that could couple to the frame of a car or other metal objects passing through the field. Because of the magnetic field’s strength, which is required to transfer sufficient power to the receiver, these electromagnetic field “leaks” raised safety concerns and reduced system efficiency.
Another previous approach used smaller transmitter coils, which addressed safety and efficiency concerns. But this approach would require a very large number of transmitters to effectively “cover” a section of the roadway, adding substantial cost and complexity to the system, and requiring very precise vehicle position detection technology.
“We tried to take the best from both of those approaches,” Lukic says.
Lukic and his team have developed a small, functional prototype of their system, and are now working to both scale it up and increase the power of the system.
Currently, at peak efficiency, the new system can transmit energy at a rate of 0.5 kilowatts (kW). “Our goal is to move from 0.5 kW into the 50 kW range,” Lukic says. “That would make it more practical.”
Go deeper with Bing News on:
- IIT-Bombay researchers develop algorithm to increase energy efficiency of wireless communication networkon August 23, 2021 at 10:32 am
The algorithm developed by researchers at IIT-B uses a statistical tool that aids the source in identifying the optimal power output without having to depend on other parameters. The performance ...
- OPPO MagVOOC magnetic flash charging tech with 20W wireless charging support unveiledon August 23, 2021 at 7:33 am
Recently, an OPPO trademark for MagVOOC was spotted online. The device is believed to be OPPO’s magnetic flash charging technology similar to the recently launched Realme MagDart and Apple’s Magsafe.
- Samsung Galaxy Buds 2 vs. Galaxy Buds Pro: Which wireless earbuds are better?on August 21, 2021 at 9:00 pm
This Samsung Galaxy Buds 2 vs. Samsung Galaxy Buds Pro face-off compares the brand’s best noise-cancelling earbuds, helping you decide which pair best suits your needs and budget. New to the scene, ...
- Steelseries Prime Wireless Pro Series Gaming Mouseon August 19, 2021 at 11:36 am
The Prime Pro Series Wireless doesn't waste time with ostentatious gamer aesthetics or RGB vomit and instead nails performance and feel. It's fascinating how much the new Prime Wireless gaming mouse ...
- Boeing Awards Solace Power Significant New Contract to Develop Wireless Power Solutionon August 19, 2021 at 7:04 am
PRNewswire/ - Solace Power Inc. ("Solace Power" or the "Company"), a world leader in high performance wireless power technology, is proud to announce ...
Go deeper with Google Headlines on:
Go deeper with Bing News on:
Wireless Power Transfer for Vehicles
- Wireless charging electric taxis arrive in Nottingham for trialon August 19, 2021 at 3:00 am
Nottinghamshire will take part in a wireless charging electric vehicle trial funded by the Office for Zero Emission Vehicles. There will be nine electric taxis including five plug-in hybrid LEVC TX ...
- WiBotic Gets Creative With New Wireless Charging for Robots and Droneson August 17, 2021 at 9:02 am
Different types of robots require different types of charging. Wibotic can keep options flexible by providing programmable onboard chargers.
- Electric Vehicle Charging Station Market Size is Projected to Reach USD 93 Billion by 2027 | CAGR 20%: Astute Analyticaon August 16, 2021 at 6:30 am
The global Electric Vehicle Charging Station (EVCS) market has been fuelled by a growing awareness of environmental conservation and carbon emission reduction. Furthermore, there has been an increase ...
- High speed induction charging could be a reality for Tesla Semion August 10, 2021 at 8:28 pm
New deal with inductive wireless charging technology hints at potentially rapid charging times for electric trucks like the Tesla Semi.
- Wireless Charging Market is Projected to touch USD 15.3 Billion by 2027, growing at the CAGR of 23.1% during the forecast period 2021-2027on August 10, 2021 at 2:18 am
A study, recently conducted by the strategic consulting and market research firm, BlueWeave Consulting, revealed that the global wireless charging market was worth USD 3.4 Billion in the year 2020.