How a Wireless Charger Works, and How Cool It Can Become

Date: 2019-12-13 11:00:16


When the battery runs out, it’s nerve-racking, but unfortunately, it happens. The more functions our devices provide, the more power they need, and they’re hungrier than hungry hippos at this point! That’s why charging technology is all the rage now, and the new big thing is wireless charging.

Even though we’re just now seeing this technology take off, the basics of how it works were discovered not long after we started to understand what electricity is. Near the end of the 19th century, engineering mastermind Nikola Tesla showed that two powerful magnetic fields can slightly transfer energy between their sources when they interfere with each other. This trick found its use more than a hundred years later!

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It’s all about the magnetic field! 1:17
What wireless chargers look like 3:46
What’s faster, wires or an electromagnetic field? 4:14
Is wireless charging safe? 4:45
Resonance charging 6:35
Laser charging 7:30
Will it be possible to charge a phone with sounds? 😦 7:58

#smartphone #gadgets #brightside

Nikola Tesla, with his equipment for producing high-frequency alternating currents: By Wellcome Collection , CC BY 4.0 ,
Animation is created by Bright Side.

– Every object with enough power is a potential source of an electromagnetic field.
– Magnetism and electricity are two sides of one coin. When electricity flows, it creates an electromagnetic field.
– To make a strong electromagnetic field with copper wire, you need a lot of it. Still, it’s one of the most fitting materials.
– The biggest surprise here is that the technology behind wireless charging hasn’t drastically changed since Tesla.
– The main problem engineers struggled with for a long time is that coils weren’t effective. The power of the field depends on the number of coils you can fit in the device.
– Another problem is that electromagnetic fields need to be close to each other to keep a strong connection.
– That’s why wireless chargers today come in the form of mats – you need to put your phone right on it to get any juice at all.
– This new tech isn’t huge yet because let’s face it – wires are still faster than an electromagnetic field.
– Wireless charging takes around double the time to charge a smartphone from 0% to 100%.
– There’s no way a short-range electromagnetic field can cause any harm to you.
– As you can imagine, the whole method of electromagnetic charging won’t stay the same. As with anything, it’ll only get better in the upcoming years.
– Resonance charging will be good for devices with a high level of power usage, like cars, laptops, or even some robots.
– Another idea researchers are considering is laser charging. It may be extremely powerful and focused, but it has big bugs to work out first.
– A laser will work on any distance but needs a clear line of sight to the device. If interrupted, it won’t work at all.
– Some other fresh research is aimed at the use of infrared light-waves, radio signals, or even ultrasound waves to charge phones and other devices.

Music by Epidemic Sound

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