Engineering

1. “
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PRODADEVARAYA INSTITUTE OF TECHNOLOGY
(Affiliated to VTU, Belagavi, Karnataka & Recognized by AICTE)
A TECHNICAL SEMINAR
WIRELESS POWER TRANSMISSION
DEPARTMENT OF MECHANICAL ENGINGEERING
UNDER THE GUIDENCE OF SUBMITTED BY
Prof. Manjunath.S.H VEERESH DIDIGI 3PG21ME496
Assistant Professor
Dept. Of Mech Engg
PDIT, Hosapete

2. Contents
• ABSTRACT
• WHAT IS WIRELESSS POWER TRANSMISSION (WPT) ?
• HISTORY OF WPT
• NECESSITY OF WPT
• TYPES OF WPT
Techniques to transfer energy wireless
• WORKING
• ADVANTAGES AND DISADVANTAGES
• APPLICATIONS
• CONCLUSION

3. “
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Abstract
The transmission of electrical energy from source to load for a
distance without any conducting wire or cables is called Wireless
Power Transmission. The concept of wireless power transfer was
realized by Nikola Tesla. Wireless power transfer can make a
remarkable change in the field of the electrical engineering which
eliminates the use conventional copper cables and current carrying
wires.

4. “
”
Abstract
The transmission of electrical energy from source to load for a
distance without any conducting wire or cables is called Wireless
Power Transmission. The concept of wireless power transfer was
realized by Nikola Tesla. Wireless power transfer can make a
remarkable change in the field of the electrical engineering which
eliminates the use conventional copper cables and current carrying
wires.

5. “
”
WHAT IS WPT ?
•Wireless power transfer (WPT), Wireless energy transmission (WET), or
Electromagnetic power transfer is the transmission of electrical energy
without wires as a physical link .
•In this system a transmitter device, transmits power to a receiver device,
through the phenomenon of electromagnetic induction.

6. “
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HISTORY OF WIRELESS POWER TRANSFER
•In 1890 , Nikola Tesla concluded that power
could be transferred between two objects
wirelessly via an electromagnetic field.
•He demonstrated wireless transmission by
"electrostatic induction" during an 1891 lecture at
Columbia College.
•He had a vision for "world wireless system".
•Wardenclyffe Tower- Tower built to achieve this
purpose

7. “
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NECESSITY OF WPT
• Environmental protection and economical
• Reduction of transmission losses Charging
of multiple devices
• Prevents corrosion and sparking
• Maintenance cost is reduced Eliminating
charging cords - provision for compact and
portable devices
• Reduced power failures

8. Why not wires ?
• As per studies, most electrical energy transfer
is through wires .
• Most of the energy loss is during
transmission
* On an average, more than 30%
* In India , it exceeds 40%

9. TYPES OF WPT
Techniques to Transfer Energy Wireless
•Near Field Technique
1) Inductive coupling
2) Resonant Inductive coupling
3) Capacitive coupling
4) Magnetic coupling
•Far Field Techniques
1) Microwave Power Transmission
2) Laser Power Transmission

10. WORKING

11. Advantages & disadvantages
Advantages
• No wires
•No e-waste Need for battery is eliminated
• Efficient energy transfer
• Harmless, if field strengths under safety levels
• Maintenance cost is less
Disadvantages
•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
• Air ionization technique is not feasible

12. Application

13. Future scope
• To transmit the power to a greater distance, a high power radio frequency
amplifier connected with an oscillator is needed. But the construction of the
bulky RF power amplifier requires much time and patience.

14. CONCLUSION
• The goal of this project was to design and implement a wireless
charger for low power devices via resonant inductive coupling. After
analyzing the whole system step by step for optimization, a circuit
was designed and implemented. Experimental results showed that
significant improvements in terms of power-transfer efficiency have
been achieved.

15. THANK YOU