Placeholder Image

字幕列表 影片播放

  • This episode of DNews is proudly brought to you by Subaru.

  • BY TESLA WE'VE GOT IT! Wireless electricity might be coming to a home near you... y'know.

  • Someday.

  • Greetings programs, Trace here for DNews. In 1897, Nikola Teslaasexual genius and

  • inventor extraordinairewanted to QUOTE "turn the whole world into a giant wireless

  • dynamo." He was awarded a patent in 1907 for wireless electricity but then the Great War

  • began and the whole thing was lost to history.

  • Now, over a century later, researchers at MIT created wireless power transmission which

  • could realize his dream! Sort of. While Tesla was trying to power cities, this transmits

  • wireless power around your house! Your phone, car, television, laptop, game console, controllers,

  • remotes, toaster and every lightbulb in every frickin' lamp could all be powered by magnetic

  • resonators.

  • The Faraday Law of Induction describes how an electromagnet creates a magnetic field.

  • When an electrified coil of wire is wrapped around a metal rod, the metal magnetizes.

  • Similarly, when you pass a magnet THROUGH an unpowered coil of wire, the magnet creates

  • electricity. Physics is awesome.

  • Researchers at MIT found a way to turn simple physics into a wireless way to transmit electricity

  • using a similar technology to WiFi. By plugging in a resonator to the alternating current

  • outlet in your wall, the device creates a magnetic oscillation. The magnetic field of

  • the resonator is large enough to mingle with nearby coils installed in the walls and floors

  • of your houseand ultimately into every device and BOOM wireless power. One magnetic

  • coil influences another and another all over the house. It's like the barking chain in

  • 101 Dalmatians!

  • MIT spun off the technology into a funny named company called WiTricity. The system can already

  • power televisions, cell phones and keep their special AA batteries fully charged all at

  • the same time!

  • To be honest, induction charging has been around for a while, as has wireless power

  • transmission. Radio waves are wireless power, the pads you can buy to charge your cell phone,

  • mouse or game controllers use wireless power, but this is a bit different. The ones we have

  • now use near-field induction and this blows it into a whole new proportion.

  • The problem with any of these systems, is the efficiency. Magnetic fields have to be

  • relatively close-by to pick up other magnetic fields. The MIT researchers were able to power

  • one 60 watt light bulb from 2 meters awaybut it was only 45% efficient. So they

  • put in 133 watts to power a 60 watt bulb. Not awesome; though according to the researchers,

  • this system is 1 million times more efficient than the ones already on the market... and

  • the CEO of WiTricity says it's 1,000 times more efficient than a battery!

  • This works with both OLD and NEW technology. Just because it's old doesn't mean it's not

  • awesome. Just ask Tekzilla's Patrick Norton - Pat customized 3 high-mileage Subaru cars

  • for 3 charity-minded owners, so they can keep doin' their thing & helping the world. Check

  • out Pat's handy work on the Second Chance Subaru series at revision3.com/subaru. If

  • you want wireless power in YOUR house, click Like and tell us what you'd use it for down

  • below! See you next time on DNews.

This episode of DNews is proudly brought to you by Subaru.

字幕與單字

單字即點即查 點擊單字可以查詢單字解釋

B2 中高級 美國腔

無需電線即可為整個家庭供電! (Power Your Entire Home Without Wires!)

  • 587 21
    胡重光 發佈於 2021 年 01 月 14 日
影片單字