Wireless chargers how do they work

Toggle navigation Wireless Charging. The signal searches for a receiver coil , like the one in your compatible smartphone. When it senses one, electromagnetic induction begins. The company's electromagnetic resonant technology allows power to transfer at distances of up to about nine inches away from a charging pad.

That would allow electric cars to charge just by parking on top of a large charging pad. For example, Mercedes-Benz this year will roll out Se plug-in hybrid sedans with the ability to use WiTricity's technology; the Se can simply park over a pad and they begin charging even more efficiently than if it were plugged in. The electric vehicle application is tailor-made for electromagnetic resonant charging, Kesler said. That's because a vehicle doesn't need a charging cable, and the wireless charging pad delivers electricity more efficiently than a cable.

This month, Apple surprised some industry watchers by purchasing PowerByProxi , a New Zealand-based company developing loosely-coupled resonant charging technology that's also based on the Qi specification. PowerbyProxi was founded in by entrepreneur Fady Mishriki as a spin-out from the University of Auckland. PowerByProxi has showcased charging boxes and bowls into which multiple devices can be placed and charged at the same time.

The Aukland-based company got its start selling large-scale systems for the construction, telecommunications, defense and agriculture industries. One such product is a wireless control system for wind turbines. PowerByProxi, a member of the WPC's Steering Committee, has also miniaturized its technology and placed it into AA rechargeable batteries, eliminating the need to embed the technology directly into devices.

Apple could use PowerByProxi's technology to expand its use fo wireless charging beyond just smartphones, using it, for instance, to charge TV remote controls, computer peripherals, or any number of devices that require batteries. While the most visible use of wireless charging technology has been in mobile device charging pads, the technology is also making inroads into everything from warehouse robots to tiny IoT devices that otherwise would need to be wired or powered by replaceable batteries.

Here are the latest Insider stories. More Insider Sign Out. Sign In Register. Sign Out Sign In Register. Latest Insider. Check out the latest Insider stories here. More from the IDG Network. If your phone was released in the last year or two, chances are that it supports wireless charging. Which wireless charger have you found to be the most effective at charging your device? By Elizabeth Thorn. Tue, 01 Sep Updated on Wed, 17 Feb How does wireless charging work?

Computer World explained this through the studies of researcher David Green who noted that there are three different types of wireless charging : Charging pads: These rely on tightly-coupled electromagnetic inductive charging. What is the Qi standard? Which phones work with the Samsung wireless charger?

Which Apple phones support wireless charging? How to choose the right wireless charger Choosing the right wireless charger comes down to the type of phone you have, its capabilities, and your own personal preferences. Related articles. Allow us to answer all these questions and more. Samsung has supported wireless charging since the Galaxy S6 and Huawei introduced it with the excellent Mate 20 Pro. An increasing number of phones also support reverse wireless charging where you can charge other devices from the phone - for more information on this, check out What is reverse wireless charging and which phones have it?

Wireless charging is the transfer of power from a power outlet to your device, without the need for a connecting cable.

It involves a power transmitting pad and a receiver, sometimes in the form of a case attached to a mobile device or built into the phone itself. When we said it was cable-free, it isn't quite, because the pad will have a cable going from the outlet into it. Wireless charging is based on inductive charging, whereby power is created by passing an electrical current through two coils to create an electromagnetic field.

When the receiving magnetic plate on the mobile device comes into contact with the transmitter - or at least within the specified range - the magnetic field generates an electrical current within the device. This current is then converted into direct current DC , which in turn charges the built-in battery.