This document discusses the principle and components of wireless charging. It explains that wireless charging works using electromagnetic induction, where a changing magnetic field in a transmitter coil induces a current in a nearby receiver coil. The main components are a transmitter that produces radio waves, a receiver, and a rectenna that converts the received electromagnetic energy into direct current. Different types like inductive, resonant, and radio charging are described for charging various devices over different distances. Applications and advantages and disadvantages of wireless charging are also summarized.

1. PRINCIPLE OF
WIRELESS CHARGING
VIVEK SINGH
SEC.- M1751
REG. NO. 11702662(A02)

2. CONTENTS -
1.WHAT IS WIRELESS CHARGING ?
2. PRINCIPLE OF WIRELESS CHARGING
3. COMPONENTS OF WIRELESS CHARGING
4. WORKING
5. DIFFERENT TYPES OF WIRELESS CHARGTING
6.APPLICATIONS
7.ADVANTEGES AND DISADVANTEGES OF WIRELESS CHARGING
8.CONCLUSION

3. WHAT IS WIRELESS CHARGING ?
*Wireless charging is one of the several methods of charging batteries without t
use of cable or device specific AC adopters.
*Wireless charging can be used for a wide variety of devices including cell phon
laptop Computers and mp3 players as well as larger objects such as robots and
electric cars .
*Wireless charging provides a convenient safe and reliable way to charge and
Power Millions of electricals devices at home at the workplace and in the industr

4. PRINCIPLE OF WIRELESS CHARGING ?
*Wireless charging works on the principle of electromagnetic induction which
produces Voltage across a conductor placed in changing magnetic field or mo
through a stationary Magnetic field .
* When an induced current is produced because of voltage production due to
Changing Magnetic field it is called electromagnetic induction.

5. COMPONENTS OF WIRELESS CHARGING
*TRANSMITTER
*RECEIVER
* RECTENNA

6. TRANSMITTER
• A Transmitter is an electronic device which produces radio waves
with the help of an antenna .most transmitters are used for radio
communication of information over a certain distance .

7. RECEIVER
A Device or apparatus that receives electrical signals ,waves
the like , and renders them perceptible to Senses as the part
a telephone held to the ear a radio receiving set or a televisio
receiving set .

8. RECTENNA
A RECTENNA is a RECTIFYING ANTENNA – A special type of antenna that is
used to convert Electromagnetic energy into direct current electricity .
They are used in wireless power transmission system That transmit power by
radio waves

9. WORKING-
*Mains voltage is converted into high frequency alternating current .
*The alternating current is sent to the transmitter coil by the transmitter circuit .
Then the alternating current induces a time varying magnetic field in the transmitt
coil.
*Alternating current flowing within the transmitter coil induces a magnetic field
Which extends to the Receiver coil .
*The magnetic field generates current within the receiver coil of the device . The
process whereby Energy is transmitted between the transmitter and receiver coil
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 by the
receiver circuit which can then be used to charge the battery.

10. METHODES OF WIRELESS CHARGING
*INDUCTIVE CHARGING
*RESONANCE CHARGING
*RADIO CHARGING

11. *INDUCTIVE CHARGING uses an electromagnetic field to transfer energy
between two objects through electromagnetic induction.
Ex. For mid size items- CELL PHONES, MP3 PLAYERS, ELECTRIC
TOOTHBRUSH, SMART WATCHES.
*RESONANCE CHARGING is used for the items that require large amount of
power .
It is used over short distance (3-5 meters).
Ex. Electric car, robot, vacuum cleaner, laptop.
*RADIO CHARGING is used for charging items with small batteries and low
power requirement devices .
It is used for long range .
Ex. Watches, medical implants, wireless keyboards, wireless mouse .

12. APPLICATIONS
*INDUCTIVE COUPLING –RFID
*IN-VEHICLE CHARGING
*RADIO CHARGING
*ULTRA WIDEBAND

13. ADVANTAGES -
*The need of different types of chargers by different manufacturers is totally eliminated .
*Lowers risk of electrical shock or shorting .
*convenience .
*wireless energy transfer can potentially recharge the mobile phones without chords .
DISADVANTAGES-
*The transmitter and receiver also should be very powerful devices as the distance increases.
*Slower charging.
*Wireless transmission of the energy causes some drastic effects to human body because of it
radiation.
*more costly.
*practical possibilities are not yet applicable as there is no much advancement in this field.

14. CONCLUSIO
N-
*A novel method of using the power of microwave to charge the mob
phones without the use of wired chargers.
*This method provides great advantage to the mobile phone users to
carry their phones anywhere even if the place is devoid of facilities
for charging