The document presents information on wireless charging. It discusses how wireless charging works using magnetic resonance to transfer electrical current between coils, without physical connectors. The process involves converting mains voltage to high frequency AC in the transmitter coil to induce a magnetic field, which generates current in the receiver coil to charge a battery. Advantages include eliminating different chargers and reducing risk of shock, while limitations include slower charging and potential radiation effects. Applications include charging smartphones, wearables, and medical devices. The future of wireless charging is dropping devices on charging pads without cables.

1. PRESENTATION
ON
WIRELESS CHARGING
Presented by,
Pradeep H R
2nd
MSC(ELECTRONICS)
Hemagangothri
P.G.C.H
Guided by,
Lakshmikanth A C
DOS in Electronics
Hemagangothri
P.G.C.H

2. CONTENTS
 INTRODUCTION
WHAT IS WIRELESS CHARGING ?
HOW DOES WIRELESS CHARGING WORKS ?
PROCESS OF WIRELESS CHARGING AND POWER TRANSFER
TRANSCRIPT OF WIRELESS CHARGING
RESONANT WIRELESS CHARGING
ADVANTAGES
FUTURE OF WIRLESS CHARGING
APPLICATIONS
LIMITATIONS
CONCLUSION
REFERENCE

3. INTRODUCTION
• 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

4. WHAT IS WIRELESS CHARGING ?
•Essentially wireless charging ( 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.

5. HOW DOES WIRLESS CHARGING WORKS
• Wireless charging is based on the principle of magnetic
resonance, or Inductive Power Transfer (IPT). This is the
process of transferring an electrical current between two
objects through the use of coils to induce an electromagnetic
field.

6. BLOCK DIAGRAM OF WIRELESS
CHARGING

7. PROCESS OF WIRELESS CHARGING AND
POWER TRANSFER

8. TRANSCRIPT OF WIRELESS CHARGING
•Mains voltage is converted into high frequency
alternating current (AC).
•The alternating current (AC) is sent to the
transmitter coil by the transmitter circuit. The
alternating current then induces a time varying
magnetic field in the transmitter coil.
•Alternating current flowing within the transmitter
coil induces a magnetic field which extends to the
receiver coil (when within a specified distance).

9. CONT…
• The magnetic field generates current within the receiver coil
of the device. The process whereby energy is transmitted
between the transmitter and receiver coil is also referred to
as magnetic or resonant coupling and is achieved by both
coils resonating at the same frequency.
• Current flowing within the receiver coil is converted into
direct current (DC) by the receiver circuit, which can then be
used to charge the battery.
• It’s through this process that power is safely transferred over
an air gap. As well as any non-metal object that might exist

10. RESONANT WIRELESS CHARGING
•It uses phenomenon of “RESONANCE”, that causes
an object to vibrate when energy of certain
frequency is applied.
•Two copper coils are used one attached to
transmitter and another to receiver.
•Both coils are tuned to same electromagnetic
frequency.
•These coils when placed one another power is

11. ADVANTAGES
•The need of different types of chargers by different
manufacturers is totally eliminated.
•Lower risk of ELECTRICAL SHOCK or shorting.
•Convenience
•Wireless energy transfer can potentially recharge
mobile phones without chords.

12. LIMITATIONS
•Transmitter and receiver also should be very
powerful devices as the distance increases.
•Slower charging.
•Wireless transmission of energy causes some
drastic effects to human body, because of its
radiation.
•More costly.
•Power loss.

13. APPLICATIONS
• Smartphones & tablets.
• Wireless charging for
wearables.
• Wireless charging for a
battery powered devices.
• Wireless charging of medical
devices & equipment.

14. FUTURE OF WIRELESS CHARGING
•No matter the device, industry, or
application, the removal of the physical
connection required for powering or
charging devices delivers a number of
benefits over traditional cable connectors –
some of which aren’t immediately obvious.

16. CONCLUSION
•Research in to using wireless technology to
supply to terminals is finally beginning to be
realized .The technology provides a wide range of
other obvious benefits, including better
probability . Charging will one day become a
simple matter of dropping devices into the
nearest charging pads.

17. REFERENCE
•https://powerbyproxi.com/wireless-charging
•https://en.wikipedia.org/wiki/Resonant_inducti
ve_coupling
•https://www.youtube.com/watch?v=JGcgEXUgI
kA

18. THANK YOU
Special thanks to ,
LAKSHMIKANTH A.C