Wireless mobile charger or wireless power transfer
WIRELESS MOBILE CHARGER OR WIRELESS
PRESENTED BY :-
GAUTAM SINGH ,
ELECTRICAL & ELECTRONIC ENGINEERING
RADHA RAMAN INSTITUTE OF TECHNOLOGY & SCIENCE
BHOPAL , MADHYA PRADESH , INDIA
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
15. NEXT STEPS/ACTIONS
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.
WIRELESS CHARGING SYSTEM
Transfer electric power to mobile nearby devices (less than
several meters) and charge batteries
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
Relatively low efficiency (about 90% efficiency
of cable chargers)
Considered frequency bands
HOW WE CAN TRANSFER ELECTRICAL ENERGY WIRELESSLY ?
BY THE HELP OF INDUCTION PROCESS.
BY THE HELP OF MICROWAVE.
BY THE HELP OF LEASER.
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”.
“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
WHAT IS MUTUAL INDUCTANC?
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.
WiTricity, a spin-off company from MIT
Power transfer to Full HD TV in CES
12W power transfer to netbook in 3feet
Receiver coils in the cover of netbook
Independent standardization activity on
100W wireless power transfer
Power transfer to 22 LCD TV 60W
Efficiency: about 80% @ 50cm
Charging distance increases by
Announcement of eZone, a wireless
power transfer system, in CES2009
Maximum supportable devices: 2
Maximum charging distance: 0.2m
Takeover WiPower in 2010 for
developing a wireless power transfer
Developing power transfer system in
Charging distance: 0.05m
Simultaneous charging to two
mobile phones in Sep. 2010
Development of a simulator which is
used for analysis of magnetic fields
between multiple coils
HIGHLIGHT OF CURRTNT ACTIVITIES
TTA PG 709 (Wireless Charging and Application)
Established in Mar. 2011
Power transfer interface
- Service & Structure -Evaluation-Interface
WG 1 WG 2 WG 3
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.
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.
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.
Each vendor considers different frequency bands for
Wireless Charging which disables interoperability
between Wireless Charging systems
Each nation has different regulation for EMI/EMC, SAR, etc.
Standardization Activities for product diversification
System & interface
Control & management protocol
Conformance test & certification
Regulation Coordination & Compromise
Activities toward the global harmonization
Cooperation with other SDOs
Investigation of the similar activities and directions in other
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