wireless mobile charger on vegakit com
#1

sir,

i am TE student of engineering from extc branch.i want to opt this project as my mini project. so, i want circuit diagram and report having description about working of the wireless mobile charging(also called induction charging);in short i want its detailed knowledge.please make sure that the circuit is tested.
my e-mail id is surajupadhyay321[at]gmail.com

thanking you,

waiting from your reply,
suraj upadhyay
mumbai ....etc
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#2
Wireless Charging provides a convenient, safe, and reliable way to charge and power millions of electrical devices at home, in the workplace and in industry.

By eliminating the use of physical connectors and cables, wireless charging provides a number of efficiency, cost and safety advantages over the traditional charging cable.

From smartphones, to hand-held industrial devices and heavy-duty equipment applications, wireless power maintains safe, continuous, and reliable transfer of power to ensure all varieties of devices and equipment are charged and ready to go at a moment’s notice.


What Is Wireless Charging?

Essentially wireless charging (a.k.a wireless power transfer) uses electromagnetic fields to safely transfer power from a transmitting source to a receiving device for the purposes of charging (or recharging) a battery. And as the name suggests, it does so without the use of a physical connection.

What Is ‘Resonant’ Wireless Charging?

You will often hear people talk about inductive and resonant technology in regards to wireless power. From a technical point of view, they are essentially one in the same. Inductive power transfer (as the overriding principle) uses resonance in order to achieve coupling of the transmitter and recover coil – achieved when the transmitter and receiver coils both oscillate – or ‘resonate’ – at the same frequency. This resonant frequency refers to the frequency at which an object naturally vibrates or rings. This is most commonly seen in the way a tuning fork can cause another to vibrate when both are tuned to the same pitch.

However in recent times, the term ‘resonant’ has taken on a slightly different meaning. What is now commonly referred to as Resonant wireless charging, is seen as an advancement on inductive capabilities in that it allows a number of advantages in relation to performance and convenience.

Some of the key advantages include:

Greater spatial freedom: This refers to the ability to achieve coupling/power transfer with greater mis-alignment for the receiver and transmitter coil along the x, y and z axis. In a real-life scenario, this means not having to precisely align your smartphone or device on top of the transmitter in order for it to begin charging.
Charging multiple devices simultaneously: Resonance promises the ability to charging more than one device at a time. How this is achieved from a technical point of view will depend on the coil geometry of the respective system, but nonetheless it provides an added convenience for larger transmitter surfaces such as table tops or work benches.
Charging speeds: Charging speeds for devices will continue to be a major factor in the adoption of wireless charging. Current inductive charging solutions produce slower charge times compared to a wired charger. In the future, resonant promises improved efficiency for power transfer between the transmitter and receiver coils, which in turn increase the rate at which power is delivered to the battery for re-charging.
For a more in-depth look into the advantages of resonant wireless charging and a discussion on the current options being developed in the marketplace – check out our blog from 2015: What’s the big deal about Resonant?

Current and Future Applications for Wireless Charging

Wireless Charging for Smartphones & Tablets
PowerByProxi Wireless Charging Pad For Smartphones

Perhaps the most well known application of wireless charging is for smartphones.

In recent years, the number of phone manufacturers who have offered wireless charging capabilities have steadily grown, and for even those brands which do not have wireless charging functionality, you can acquire a myriad of external charging cases and sleeves which can enable wireless charging of these devices.

The current technology enables consistent, safe charging of single devices when placed accurately on a charging pad – characteristic of inductive charging systems. The leading standard worldwide for this technology is Qi, which is developed by the Wireless Power Consortium and is used by over 900 products worldwide.

As advancements continue to be made, wireless charging will likely become more ubiquitous and convenient. The development of resonant capabilities will continue to increase the appeal of wireless charging for consumers, while integrated transmitters into tables and bench tops will make it easier than ever to recharge our phones.

PowerbyProxi doesn’t manufacture charging pads or integrated receiver solutions like sleeves and cases for public purchase. Instead our focus is on developing the next generation of solutions for wireless charging for smartphones including greater capability for free placement of devices, foreign object detection and multi-device charging.

Customers have the opportunity to purchase our development kit and patent licenses to develop and manufacture their own product. For more information, check out our Proxi-2D EVK page.
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