CONTAINS 31 SLIDS BASED ON WIRELESS POWER TRANSFER B.TECH PROJECT

1. 1/8/2014
R.V.S.C.E.T. EEE DEPARTMENT
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2. PRESENTED BY:ANKIT KUMAR (EEE/317/10)
VIKASH KUMAR (EEE/267/10)
PANKAJ KR. MEHRA (EEE/279/10)
RAKESH KUMAR (EEE/290/10)
SUBMITTED TO:PROF. VIKRAM SAXENA (PROJECT GUIDE)
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3. R.V.S.C.E.T. EEE DEPARTMENT
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CONTENTS :1. INTRODUCTION & HISTORY BY ANKIT KUMAR
2. INDUCTIVE RESONANCE COUPLING BY
VIKASH KUMAR
3. CONSTRUCTION &OPERATION BY PANKAJ
KR.MEHRA
4. APPLICATION & FUTURE
BY
RAKESH KUMAR
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4. What is WitriCity?
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 .
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5. Why we need Witricity?.
WE USE WIRES…
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6. 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.
 Able to light lamps over 25 miles away
without using wires
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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7. R.V.S.C.E.T. EEE DEPARTMENT
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TYPES OF WITRICITY
Inductive
Coupling
Resonant
Inductive Coupling
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8. Inductive coupling
• Primary and secondary coils- not connected
with wires.
• Energy transfer - due to Mutual Induction.
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9. Inductive coupling (contd…)
• 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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10. Resonance Inductive
Coupling(RIC)
 Combination of inductive coupling and
resonance
 Resonance makes two objects interact very
strongly
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11. 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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12.  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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13. BASIC TECHNOLOGY :WORKING CYCLE
Electricity
Resonant
Magnetic
Coupling
Magnetism
Resonance
Energy/Pow
er Coupling
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Electromagn
etism
Magnetic
Induction
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14. AIM OF THE CIRCUITS :-
1.
2.
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• CONVERTION OF NORMAL
FREQUENCY TO HIGH
FREQUENCY
• CONVERTION OF INDUSED
HIGH FREQUENCY TO
NORMAL FREQUENCY
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15. CONVERTION OF LOW FREQUENCY
INTO HIGH FREQUENCY :1. OSCILATOR
2. INVERTOR
3. INDUCTION COILS
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16. FIRST METHOD :USE OF OSCILATOR TO GENERATE A FIXED HIGH
FREQUENCY
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17. SECOND METHOD :USE OF INVERTOR TO GENERATE REGULATED HIGH
FREQUENCY
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18. R.V.S.C.E.T. EEE DEPARTMENT
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THIRD METHOD :-
USE OF INDUCTION COIL WITH
PROPER TUNING

19. TRANSMITER CIRCUIT :- BY MULTISIM
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20. RECIVER CIRCUIT:-
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BY MULTISIM

21. COMPLETE BLOCK DYGRAM:-
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22.  No
wires
 Need for battery is eliminated
 No
e-waste
 Efficient
energy transfer
 Harmless, if field strengths under safety
levels
 Maintenance cost is less
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23.  Distance
constraint
 Field strengths have to be under safety
levels
 Initial cost is high
 In RIC, tuning is difficult
 High frequency signals must be the supply
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24. 
Electric automobile charging
 Static and moving

Consumer electronics

Industrial purposes
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25. IN MEDICAL
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26. eliminating the need for disposable batteries or
a power cord connecting the helmet
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27. 1/8/2014
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28. IN CONSUMER ELECTRONICS
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29. Conclusion
•
•
•
•
•
•
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Transmission without wires is possible
Efficient
Low maintenance cost. But, high initial cost
Better than conventional wired transfer
Energy crisis can be decreased
Low loss
In near future, world will be completely wireless
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