Wireless Charging Table for Electronic Gadgets

Project Title

Wireless Charging Table for Electronic Gadgets

Project Area of Specialization Wearables and ImplantableProject Summary

We hope to achieve a wireless charging table which is convenient in it's operation, more effcient in power transfer, smart in communication and energy transfer. Using the concept of Resonance Inductive Coupling in strict adherence to the Qi Standard, we should be able to successfully design a functional and more effcient wireless charging table.

Project Objectives

Wireless charging of gadgets is one of the new emerging technologies in the world at the moment. As long as there have been need for it, people have been trying to go wireless. Mostly wireless power transfer are generally utilized
in electronic devices such as smart phones, laptops, wearable electronics, and portable devices.

The target in wireless charging is to use an optimized design which can provide high effciency and large power transfer density by using coils coupled as tight as possible. High effciency, large power density and larger air gaps are the major goals and challenges for wireless charging applications. As our nal year project, we aim to design a wireless charging table for mobile phones and laptops with high effciency at a fairly long distance.

Project Implementation Method

There are numerous techniques for the wireless power transfer for the sake of charging the daily life electronic gadgets like mobile phones and laptops. In our project we will be using Inductive Power Transfer using Resonance Coupling. The basic principle of working of wireless charging is based on Faraday's Law. Moreover, Voltage and Load Regulation will be done throughout the project design. 

At the first step, main AC supply coming from WAPDA of 220-240V at 50 Hz will be converted into DC voltage using a full bridge Rectier. This DC output will be fed to the Chopper Circuit which will convert this DC voltage into high frequency square wave of AC voltage of 75 kHz. This high frequency square wave will pass through an Isolator which is basically an high frequency DC transformer used for the purpose of isolating the main transmitter receiver circuit from the inverters in case of any fault occurrence at transmitter as well as receiver side. This AC voltage will then pass through an RLC transmitter circuit which will operate under resonant frequency of 75 kHz with the receiver RLC circuit with air as medium between them and this received AC voltage will be converted into DC with a full bridge Rectier and supplied to the DC load which will be either a mobile phone or a laptop.

Benefits of the Project

There are many reasons why should wireless charging be chosen for application. There is no need to plug in a device and no plug compatibility issues, its also safer since there is no contact with exposed electrical connectors. Now compatible devices from a wide range of receiver applications can fuel up cable-free. Currently, inductive or resonant solutions can be used for the following applications:

• Smart phones,Laptops and wearables
• Notebooks and tablets
• Power tools and service robots, such as vacuum cleaners
• Multicopters and electric toys
• In-car charging
• Medical devices

Technical Details of Final Deliverable

In our proposed project, we would increase effciency by increasing the frequency as high as 75KHz and changing the coil design to make receiver and transmitter elds to interact
with each other in more effcient way so that we can charge our equipment with small distance above the coil. In recent project the laptop charging time was 4 to 5 hours and
mobile charging time was 1 to 2hours.In our project,we would increase its effciency by reducing the charging time less than above time.

Final Deliverable of the Project Hardware SystemType of Industry Energy , Manufacturing Technologies Wearables and Implantables, OthersSustainable Development Goals Industry, Innovation and Infrastructure, Responsible Consumption and ProductionRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	23000
MOSFETs	Equipment	4	2000	8000
Coils' conductor	Equipment	1	10000	10000
PCB and etching	Miscellaneous	5	1000	5000