wireless power transfer

1. PRESENTED BY:-
1.ANKIT KUMAR 10ENG238223548
2.VIKASH KUMAR 10ENG238223524
3.PANKAJ KR. MEHRA 10ENG238223537
4.RAKESH KUMAR 10ENG238223570
GUIDED BY :- PRO.VIKRAM SAXENA
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2. 7/18/2017R.V.S.C.E.T. (E.E.E. branch)2
Witricity is nothing but wireless electricity.
Transmission of electrical energy from one
object to another without the use of wires is
called Witricity.
Because of Witricity some of the devices won’t
require batteries to operate .

3. History of Wireless Power:
 In 1899, Sir Nikola Tesla Proposed a
method of Wireless Power Transmission.
 As it is in Radiative mode, most of the
Power was wasted and has less efficiency.
The team from Massachusetts Institute
of Technology, who call their invention
‘WiTricity‘.
In the first successful trial of its kind,
the team was able to illuminate a 60-
watt light bulb 7ft away.
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4. Types of wireless energy transfer
techniques are:-
Short range– Inductive coupling
Mid range– Resonance Inductive coupling
Long range-Microwave Transmission
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5. MICROWAVE POWER
TRANSMISSION
• Transfer high power from
one place to another
• Electrical energy
converted
into microwave energy
using magnetron
• Capturing microwave using recteena
• Conversion of microwave energy into electricity
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6. LASER POWER TRANSMISSION
* LASER highly directional and coherent
* But, gets attenuated if obstacle between source
and load
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7. RECTEENA
•
RECTEENA=RECTIFIE
R+ANTEENA
• A SPECIAL TYPE OF
ANTEENA THAT
CONVERTS
MICROWAVE TO
DIRECT CURRENT
ELECTRICITY

8. ORBITTING SATELLITE -COLLECTS
SOLAR ENERGY ON SPACE
ADVANTAGES- HIGHER COLLECTION
RATE EXPOSED 24 hr/day
DISADVANTAGES- HIGH COST
EXTRA COST OF MAINTENANCE

9. MAGNETRON
• A CAVITY
MEGNETRON
IS HIGH
POWER
VACCUM
TUBE
• GENERATES
MICROWAVE
S USING
INTERACTIO
N OF
STREAM OF
ELECTRONS

10. Inductive coupling
Primary and secondary coils- not
connected with wires.
Energy transfer - due to Mutual
Induction.
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11. Inductive coupling…
• Transformer is also an example
• Energy transfer devices are usually air-cored
• Wireless Charging Pad(WCP),electric brushes
are some examples
• On a WCP, the devices are to be kept, battery
will be automatically charged.
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12. Resonance Inductive Coupling(RIC)
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Combination of inductive coupling and
resonance
Resonance makes two objects interact
very strongly
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13. How resonance in RIC?
• Coil provides the inductance
• Capacitor is connected parallel to the coil
• Energy will be shifting back and forth
between magnetic field surrounding the
coil and electric field around the capacitor
• High resonant frequency
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14. RIC vs. inductive coupling
• RIC is highly efficient
• RIC has much greater range than inductive
coupling
• RIC is directional when compared to inductive
coupling
• RIC can be one-to-many. But usually inductive
coupling is one-to-one
• Devices using RIC technique are highly portable
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15. AC
MAIN
S
POWER
AMPLIFIER
FILTER
/
INVERTE
R
AC / DC
RECTIFIER
AC-DC
/RF
CONVERT
ER
COMPLETE BLOCK DIAGRAM
PRIMARY
COIL
SECONDRY
COILLOAD
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16. FREQUENCY GENERATION BY FREQUENCY
TRANSFORMER
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17. TRANSMITTER CIRCUIT:-
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18. RECEIVER CIRCUIT:-
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19. SPECTRUM USED IN W.P.T.
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20. OUR SIMULATION WORK:-
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21. LATEST WORK at KAIST on WPT
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This is a simulation result of magnetic flux lines of DCRS coil
configuration

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23. – Electric automobile charging
– Consumer electronics
– Industrial purposes
Applications:-
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24. USES IN TELEVISION
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25. USES IN AUTOMOBILE
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26. USES IN TOOTHBRUSH
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27. IN ROBOTS
Eliminating the need for disposable batteries or a
power cord connecting the helmet
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28. Advantages of WITRICITY
• No wires
• Highly Resonent strong coupling provides high Efficiency over Distance
• Energy transfer via magnetic near field can penetrate and wrap arround obstacle
• Non –Radiative energy transfer is safe for people and animals
• Scable Design Enables solution from milli watts to kilowatts
• Maintenance cost is less
• Lower Frequency Operation
• Practical for short Distance
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29. Disadvantages
• Distance constraint
• High power Loss
• Non directionality
• Field strengths have to be under safety levels
• Initial cost is high
• In RIC, tuning is difficult
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30. Our achievement :-
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DISTANCE IN CENTIMETER
Powerinmilliwatt

31. REFRENCES:-
a. http://www.wirelesspowerconsortium.com
b. http://www.witricity.com
c. Dr. Morris Kesler WiTricity Corporation” Highly Resonant Wireless
Power Transfer:Safe, Efficient, and over Distance”
d. wikipedia.com
e. Howstuffwork.com
f. www.google.com
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32. Thank you !