CHARGING SYSTEM WIRELESS

1. SREENIDHI INSTITUTE OF SCIENCE AND
TECHNOLOGY
SEMINAR TOPIC
WIRELESS CHARGING SYSTEM
PRESENTEDBY
SURESHREDDY PANDEM
REGD NO:20315A0217
SNIST

2. CONTENTS
• Introduction
• Components
• Working
• Types of wireless charging
• Advantages
• Disadvantages
• Applications
• Conclusion
• References

3. INTRODUCTION
• Mobile batteries are becoming a basic part of our life the charging mobile
phone batteries has always been a problem
• The mobile phones vary in their talk time battery stand by according to their
manufacturer and batteries

4. COMPONENTS
•Transmitter
•Receiver
•Rectenna

5. TRANSMITTER
• A transmitter is an electronic device Which produces radio waves with the help
of antenna most transmitter are used for radio communication of information
over a certain distance

6. RECIEVER
A device or apparatus that receive electrical signals
Waves or the like and renders them perceptible to
the senses As the part of telephone held
t o the ear radio receiving set. or Television
receiving set

7. RECTENNA
• A rectenna is a rectifying antenna — a special type of receiving antenna that
is used for converting electromagnetic energy into direct current
(DC) electricity. They are used in wireless power transmission

8. WORKING
• Wireless charging works by transferring energy from the charger to a
receiver in the back of the phone via electromagnetic induction.
The charger uses an induction coil to create an alternating electromagnetic
field, which the receiver coil in the phone converts back electricity to be fed
into the battery.

9. TYPES OF WIRELESS CHARGING
•Resonance charging
•Radio charging
•Inductive charging

10. RESONANCE CHARGING
• Resonance charging is a wireless charging method for items that
require large amounts of power, such as an electric car, robot,
vacuum cleaner or laptop computer. The method works over
small distances (3-5 meters)

11. RADIO CHARGING
• Radio charging is a wireless charging method used to charge items
with small batteries and low power requirements, such as watches,
hearing aids, medical implants, cell phones and wireless keyboards
and mice. Radio waves are already in use to transmit and receive
cellular telephone, television, radio and Wi-Fi signals.

12. INDUCTIVE CHARGING
Inductive charging (also known as wireless charging or cordless charging)
wireless power transfer. It uses electromagnetic indution to provide electricity
to portable devices. Inductive charging is also used in vehicles, power tools,
electric toothbrushesand medical devices.

13. ADVANTAGES
• Less cords
• Universal compatibility
• Safer connections
• More durable
• No overheating

14. DISADVANTAGES
• Slower charging – Due to the lower efficiency
• More expensive
• Inconvenience – When a mobile device is connected to a cable, it can be
moved around and operated while charging.
• Compatible standards – Not all devices are compatible with different
inductive chargers.
• Inefficiency – Inductive charging is not as efficient as direct charging

15. APPLICATIONS
• Electric cars
• Laptops
• Mobiles
• Robots
• Home appliances
• watches

16. CONCLUSION
Wireless charging is convenient and fairly efficient. Currently, electric
toothbrushes and cellular phones need to be in contact with
the charger's surface.

17. REFERENCES
Espejel.J.D,”RF to DC power generation", University of
Maryland, December 2003.
http://drum.umd.edu:8003/dspace/handle/1903/173
Electronics today magazine, June 2008th issue, page no
63-66. www.Howdostuffwork.com www.WhatIs.com

18. THANK YOU