This document presents information on wireless charging technology. It discusses how wireless charging uses electromagnetic fields to transfer energy between two objects, such as a charging station and electrical device, through inductive coupling. The document provides a brief history of wireless power transmission, including Nikola Tesla proposing the concept in 1890 and MIT researchers powering a light bulb in 2007. It describes how wireless systems use inductive coupling between planar coils to transfer power from a transmitter to receiver. The document notes that wireless power systems are evolving to allow for more convenient charging of smartphones and other mobile devices without needing separate chargers.

1. Presented By ::
Ripon Barua
(12012101200489)
&
Md. Fakrul Hasan
(12012101200464)
Supervised By ::
Mr. Asif Md. Siddiqee
Lecturer, DEEE,PUC
Presentation on

2. • Introduction
• Literature view
• Block diagram
• Methodology
• Conclusion
• References
Dept. of EEE, Premier University 2

3. Wireless charging ( also known as “Inductive charging”) uses
electromagnetic field to transfer energy between two objects.
This is usually done with a charging station.
Energy is sent through an inductive coupling to an electrical
device, which can use that energy to charge batteries or run
the device.
Dept. of EEE, Premier University 3

4. • In 1890,Sir Nikola Tesla proposed a method Wireless Power
Transmission.
• Tesla enlightened 200 lamps at the distance of 40km. But only
15% efficiency was achieved.
• In 2007,a group of engineers at MIT came up with the idea to
use resonant induction to transmit power wirelessly.
• MIT powered 60watt light bulb from 2 meters (7 ft) at 40%
efficiency.
Dept. of EEE, Premier University 4

5. Dept. of EEE, Premier University 5

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7. • Wireless systems use inductive coupling between two planar
coils to transfer power from power transmitter to power
receiver.
• Coil assemblies for the transmitter and receiver are a
combination of coil, shield and magnet/attractor.
• The transmitter side coil design allows consistent field
strength to be applied to the receiver coil. It enables reliable
operation over a number of interoperable devices.
Dept. of EEE, Premier University 7

8. • Wireless power systems are constantly evolving as more and
more practical options for charging smart phone and other
mobile devices.
• No need of separate mobile phone charger.
• Easy to operate and it is environmentally friendly.
• It is very useful for EVs (Electric Vehicles).
Dept. of EEE, Premier University 8

9. • https://www.mepits.com/project/171/Wireless/-Wireless-
Power-Transmission-Mobile-Charger-Circuit-Using-Inductive-
Coupling
• http://powerbyproxi.com/wireless-charging
Dept. of EEE, Premier University 9

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