this technology is basically based on induction coupling. in which no need of any communication wire to transfer electrical energy

1. WIRELESS MOBILE CHARGER OR WIRELESS
POWER TRANSFER
PRESENTED BY :-
GAUTAM SINGH ,
ELECTRICAL & ELECTRONIC ENGINEERING
RADHA RAMAN INSTITUTE OF TECHNOLOGY & SCIENCE
BHOPAL , MADHYA PRADESH , INDIA

2. CONTENTS
1. INTRODUCTION
2. WIRELESS CHARGING SYSTEM
3. OVERVIEW OF WIRELESS CHARGING SYSTEM
4. HOW WE CAN TRANSFER ELECTRICAL ENERGY WIRELESSLY ?
5. ELEMENT USEDS
6. WORKING PRINCIPLE
7. WHAT IS MUTUAL INDUCTANC ?
8. CIRCUTI DIAGRAM
9. HOW TO OPERATE THIS WIRELESS POWER TRANSFER CIRCUIT ?
10. TECHNICAL TRENDS
11. HIGHLIGHT OF CURRTNT ACTIVITIES
12. WIRELESS BATTERY CHARGER ADVANTAGE
13. WIRELESS POWER TRANSFER CIRCUIT APPLICATION
14. CHALLANGES
15. NEXT STEPS/ACTIONS

3. INTRODUCTION
THIS IS SPECIAL KIND OF CHARGING SYSTEM
IN WHICH, THERE IS NO NEED OF ANY KIND
OF COMMUNICATION WIRE TO CONNECT
THE POWER SUPPLY TO CHARGE IT.
FROM THIS CIRCUIT WE CAN CHARGE
MOBILE OR OTHER DEVICE WIRELESSLY IN A
SHORT RANGE OF DISTANCE.

4. WIRELESS CHARGING SYSTEM
Transfer electric power to mobile nearby devices (less than
several meters) and charge batteries

5. OVERVIEW OF WIRELESS CHARGING SYSTEM
Wireless Charging System
How to transfer power and charge efficiently
Devices which have a battery
Wireless Power Transfer System
How to transfer power efficiently
All electric devices
Difference from cable chargers
Elimination of complicated wire cables
Safety from electric shock
Increased mobility
Relatively low efficiency (about 90% efficiency
of cable chargers)
Considered frequency bands
20~60 kHz
80~370 kHz
6.78~13.56 MHz

6. HOW WE CAN TRANSFER ELECTRICAL ENERGY WIRELESSLY ?
BY THE HELP OF INDUCTION PROCESS.
BY THE HELP OF MICROWAVE.
BY THE HELP OF LEASER.

7. ELEMENT USED
RECEIVER CIRCUIT
1.DIODE 1N4007
2.RESISTANCE 1K OHM
3.LIGHT EMITTING DIODE
4.CAPACITOR 220 MICRO FARAD 40 VOLT
5.REGULATED INTEGRATED CIRCUIT L7805CV
TRANSMITTER CIRCUIT
1.DIODE 1N4007
2.DIODE 1N4148
3.RESISTANCE 1K OHM
4.RESISTANCE 10K OHM
5.N-CHANNEL MOSFET IRF540
6.INDUCTOR 10MICRO HeNRY
7.CAPACITOR 220 MICRO FRAD 40 VOLT
8.REGULATED INTEGRATED CIRCUIT L7824CV
9.LIGHT EMITTING DIODE

8. WORKING PRINCIPLE
This circuit mainly works on the
principle of mutual inductance. Power
is transferred from transmitter to
receiver wirelessly based on the
principle of “inductive coupling”.

9. “Mutual inductance” is the phenomena in which,
when a current carrying conductor is placed near
another conductor voltage is induced in that
conductor. This is because, as the current is flowing in
the conductor, a magnetic flux is induced in it. This
induced magnetic flux links with another conductor
and this flux induces voltage in the second
conductor. Thus two conductors are said to be
inductively coupled.
WHAT IS MUTUAL INDUCTANC?

10. CIRCUTI DIAGRAM

11. HOW TO OPERATE THIS WIRELESS POWER
TRANSFER CIRCUIT ?
Initially, connect the circuit as shown in the circuit diagram.
Switch on the supply.
Connect the battery charger at the output of the circuit.
Place the receiver coil near the transmitter coil .
You can observe the charging of battery.

12. TECHNICAL TRENDS
 WiTricity-Haire
 WiTricity, a spin-off company from MIT
 Power transfer to Full HD TV in CES
2010
 Intel
 12W power transfer to netbook in 3feet
 Receiver coils in the cover of netbook
 Independent standardization activity on
100W wireless power transfer
 Sony
 Power transfer to 22 LCD TV 60W
 Efficiency: about 80% @ 50cm
 Charging distance increases by
repeaters
 Qualcomm
 Announcement of eZone, a wireless
power transfer system, in CES2009
 Maximum supportable devices: 2
 Maximum charging distance: 0.2m
 Qualcomm-WiPower
 Takeover WiPower in 2010 for
developing a wireless power transfer
system
 Developing power transfer system in
vehicles
 Charging distance: 0.05m
 Fujitsu
 Simultaneous charging to two
mobile phones in Sep. 2010
 Development of a simulator which is
used for analysis of magnetic fields
between multiple coils

13. HIGHLIGHT OF CURRTNT ACTIVITIES
TTA PG 709 (Wireless Charging and Application)
Established in Mar. 2011
Scope:
Standard roadmap
Power transfer interface
Control mechanism
12 members
- Service & Structure -Evaluation-Interface
TTA PG709
Steering Committee
WG 1 WG 2 WG 3

14. WIRELESS BATTERY CHARGER ADVANTAGE
Usage of separate charger is eliminated.
Phone can be charged anywhere and anytime.
It does not require wire for charging.
Easier than plug into power cable.

15. WIRELESS POWER TRANSFER CIRCUIT APPLICATION
Wireless chargers can be used to charge mobiles, camera
batteries, Bluetooth headsets etc.
This can also be used in applications like car battery
charger with little modification.
This can also be used in medical devices.

16. CHALLANGES
Product Diversification
As market is increasing, each vendor makes the Wireless
Charging system which has different structure & protocol.
Wireless Charging is possible only between systems
having the same structure & protocol.
Frequency Issues
Each vendor considers different frequency bands for
Wireless Charging which disables interoperability
between Wireless Charging systems
Regulation Issues
Each nation has different regulation for EMI/EMC, SAR, etc.

17. Standardization Activities for product diversification
System & interface
Control & management protocol
Conformance test & certification
Regulation Coordination & Compromise
Frequency band
EMI/EMC
SAR
Activities toward the global harmonization
Cooperation with other SDOs
Investigation of the similar activities and directions in other
organizations
NEXT STEPS/ACTIONS

18. REFERENCE
1. MIT BOSTON, U.S.A
2. TSHINGHUA UNIVERSITY , CHINA
3. ELECTRONIC DEVICE & CIRCUIT, BOYLSTED
4. CIRCUIT THEORY, ALEXANDER & SADIKU
5. SAMSUNG, INTEL, LG ,SONY
6. WIKIPEDIA
7. ENCYCLOPEDIA
8. YOUTUBE
9. ELECTRONICHUB.COM

19. THANK YOU