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Wireless Charging

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Wireless Charging
Tanzina Sultana, Farjana Jahan Aneela, Maima Ahmed Preeti
Department of Electrical and Electronic Engineering, North South University, Bangladesh tanzina.sultana@northsouth.edu, farjana.aneela@northsouth.edu, maima.preeti@northsouth.edu

Abstract: Now a day’s people are using different types of wireless devices for their reliable and safe communications. This journal deals with wireless charging which can solve problems with short battery life. It would be very useful as the uses of laptops, cell phones (especially smartphone) and other portable devices are increasing rapidly in present and mainly for cordless devices or which has unmanageable wire connections. This technique passes electromagnetic energy to the portable devices when it is placed close to the wireless charger.

magnetic field by passing alternating current through it for which there is a voltage induced in the receiver.

I. INTRODUCTION
In 1900 June Nikola Tesla introduced the concept of wireless charging. During 1891 to 1904 using Tesla coils
(generates high AC voltage) he transmitted power without wires by capacitive coupling and inductive.
Wireless charging is also known as inductive charging. It consists of two coils which is transmitter coil and receiver coil. Recent technology has introduced movable transmission coil and the receiver coils made of silver plated copper.
Sometimes it is also made of aluminium to reduce resistance and weight. From the past few years wireless charging has appeared in the electronic markets. In present, wireless charging can be seen in many restaurants like Starbucks,
McDonalds.

Figure 1. Wireless Charging
II. AN INTRODUCTION TO THE WIRELESS POWER FUNCTION
The wireless charging defines inductive coupling. It uses two for coils one is transmitting and another one is for receiving.
They are usually kept at a

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