Wireless Phone Chargers
In this article, we will give a detailed review of Wireless Phone Chargers:
Nikola Tesla, a pioneer in the field of electricity, showed in the late 1800s how to use magnetic resonant coupling to send electricity through the air by creating a magnetic field between two circuits (a transmitter and a receiver).
But until about 100 years ago, it was mainly used to make electric toothbrushes.
There are more than six Wireless Phone Chargers technologies on the market right now, and they all try to eliminate the need for cables in everyday life.
Wireless Phone Chargers is becoming more popular in the healthcare, automotive, and manufacturing industries because it could make devices more mobile and because new technology could let tiny Internet of Things (IoT) devices get power from a charger many feet away.
Current technologies for wireless charging use an electromagnetic field made by a gap between two copper coils. This makes the charging distance much shorter. The iPhone 8 and iPhone X from Apple have this charging technology.
David Green, in charge of research at IHS Markit, says wireless charging falls into three main groups.
Charging bowls or through-surface chargers use loosely coupled or radiative electromagnetic resonant charging to send a charge a few centimetres.
Charging pads use electromagnetic inductive or non-radiative charging. Lastly, uncoupled radio frequency (RF) wireless charging lets you set a device slowly from far away.
A changing magnetic field causes a current to flow in a closed wire loop. This physical principle is the basis for inductive and loosely coupled resonant charging.
A magnetic loop antenna (copper coil) makes an oscillating magnetic field, which causes a current in one or more receiver antennas. Add the proper capacitance so that the loops resonate at the same frequency to increase the amount of induced current in the receivers.
Magnetic resonance, called resonant inductive charging, makes sending power over long distances easier.
The size of the coil also affects the amount of power that can be sent. The bigger the ring or the more waves there are, the farther a charge can go.
Since the copper coils in wireless smartphone charging pads are only a few inches in diameter, they can only send power over a short distance.
But more power can be sent without wires when the coils are bigger. WiTricity, a company started after ten years of research at MIT, was one of the first to use this method.
It gives patent licences for various uses, such as cars, wind turbines, and robotics, that use loosely coupled resonant technology.
Even though the new Energous products show that this method works over very short distances, like a few centimetres, Green thinks that charging across a room is still a year away from being a commercial reality at high volumes.
In 2016, almost 200 million Wireless Phone Chargers devices were shipped, most of which used an inductive (charging pad) design.
After thinking about it for years, Apple made things right in September by adopting the same standard for wireless charging that Samsung and other Android phone makers have used for at least the past two years: WPC’s Qi standard.
Tightly coupled or inductive charging was the first mobile device wireless charger to come out about six years ago. It requires users to place their phone in a specific spot on a pad for it to charge.
Benjamin Freas, the chief analyst at Navigant Research, says, “Lining it up exactly to charge doesn’t save you much work over just plugging it in.”
Wireless Phone Chargers Description
The most significant benefit of wireless charging is that you don’t have to deal with cords. By putting your phone on the charging dock, you can avoid tangled lines and make the process much easier.
You won’t have to worry about losing your charging cable or finding one that works. With a Wireless Phone Chargers, you can charge multiple devices at once.
Some wireless chargers are great because they can be used with almost any phone, no matter how big or small the phone’s charging port is. Not only can the Wireless Phone Chargers be used with smartphones, but it can also be used with other devices.
People may now be glued to their phones simultaneously in the same room. Apple and Android phones are the only ones that don’t use the same charging port as most other phones. You can charge multiple phones simultaneously with a wireless charging pad.
A charging station for multiple devices lets you simultaneously charge various phones, tablets, laptops, and other devices. This will help you eliminate all the power cords and plug adapters worldwide.
But as reverse charging technology improves, phones will soon be able to power other devices.
Smartphones that charge quickly, like the Samsung Galaxy S8, usually charge faster with a cable than wirelessly.
Modern Wireless Phone Chargers with more power can fully charge a smartphone with a big battery in about two hours, though this time varies by model. The most common wattage ratings are 5W and 10W, with an output amperage rating of 1A at 5V. This makes 1A wireless chargers about the same as a standard 1A USB cable charger, like the one with the iPhone 7.
Some people in the business world were surprised when Apple bought PowerByProxi, a New Zealand company working on Qi-based loosely-coupled resonant charging technology.
Fady Mishriki, an entrepreneur, started PowerbyProxi in 2007 as a spin-off from his college work. PowerByProxi has shown charging bowls and storage containers that can charge multiple devices at the same time.
Based in Auckland, New Zealand, the company first did well by selling large systems to the construction, telecom, military, and farming industries. One example is a system for controlling wind turbines without wires.
A WPC’s Steering Committee member, PowerByProxi, has shrunk its technology and put it in AA rechargeable batteries and directly into devices. The wireless parts take up about 10% of an AA battery’s height.
