This document discusses wireless power transmission (WPT) and its history, methods, applications and challenges. It begins with an introduction to WPT and its advantages over wired power transmission. It then discusses Nikola Tesla's early work on wireless power in 1893 and subsequent research at MIT. The document outlines different WPT methods like inductive coupling and resonant induction coupling which transfer power through electromagnetic induction between coils. It also describes microwave power transmission which can transfer power over longer distances. The document discusses applications of WPT in electric vehicles, consumer devices and remote areas. It concludes that WPT could play a significant role in the future by reducing power losses during transmission.

1. Presented by,
WAFA
WIRELESS POWER TRANSMISSION

2. CONTENTS
 Introduction
 History of WPT
 Problems in present scenario
 Working principle
 Methods of WPT
 Advantages and Disadvantages
 Applications
 Conclusion
 References

3. Introduction
 The Transmission Of Power From One Place To
Another Without Using Wires, Cables, Or
Chords.
 Conventional energy transfer is using wires.
But the wireless transmission is made possible
by using various technologies.
 Transmission of energy through the air.

4. HISTORY
 In the year 1893,Nikola Tesla proposed the method
of wireless transmission of electric power.
 A group of engineers at MIT came up with the idea
to use resonant induction to transmit power
wirelessly.
 He built the wardenclyffe tower and this
was to be the first broadcasting system
in the world.

5. PROBLEMS IN PRESENT SCENARIO
 One of the major problem in existing power system is the losses
occuring in the transmission.
 High cost, difficult installation.

6. WORKING PRINCIPLE
Block Diagram

7. Specifications

8. Types AND METHODS of wireless POWER
transfer techniques

9. INDUCTIVE COUPLING
 Primary and secondary coils are not connected
with wires.
 Inductive coupling works on the principle of
electromagnetic induction.

10. Resonant Induction Coupling(RIC)
 When the two coils are adjusted so that they resonate at the
same frequency is called RIC.
 Resonance makes two objects interact very strongly.

11. MICRoWAVE POWER TRANSFER
 Aims at higher power transfer over longer distances
practically in the range of some miles.
 Steps:
o Conversion of electrical to microwave energy.
o Capturing of microwave beams by Rectenna.
o Conversion of microwave to electrical energy.

12. Contd….
 AC can not be directly converted to microwave
energy.
 AC is converted to DC first.
 DC is converted to microwaves using magnetron.
 Microwaves produced at 2.45 GHz by using
Magnetron.
 Rectenna is used for collecting these Microwaves
(One and half mile long)
 Transmitted waves are received at rectenna which
rectifies, gives DC as the output
 DC is converted back to AC.

13. ADVANTAGES
 The main advantage is it is omnidirectional means the
electrical energy generated can be transmitted in all the
desired directions.
 Power theft would be not possible at all. WPT replaces the
use of power cables and batteries thus Installation cost
reduces.
 It eliminates mess of cords, reduces toxic battery waste,
reduces use of plastics ,rubber and metals.
 Creation of a shock free environment.

14. DISADVANTAGES
 High frequency signals must be the supply.
 Some of the WPT techniques such as rectenna
occupy large space.
 Cost of implementing WPT is expensive.
 Wireless transmission of the energy causes some
drastic effects to human body, because of its
radiation..

15. APPLICATIONS
 Near-field energy transfer:
o Electric automobile charging
o Consumer electronics
o Industrial proposes
 Far-field energy transfer:
o Solar power satellite
o Energy to remotes areas
 Tesla coils are used as leak detectors in scientific high vacuum
systems and igniters in arc welders.
 Moving target such as fuel free
airplanes , electric vehicles , moving robots.

16. CONCLUSIONS
 We realize that Wireless Energy Transfer & Electricity may
play a significant role in the future in the field of
Transmission of Electric power.
 During transmission of electric current through conductor
wires, a large portion of power is lost in form of heat
dissipation. However, with proper application of
‘WIRELESS POWER TRANSFER TECHNIQUES’, this
loss can be prevented and hence there would be better
utilization of electric power.

17. REFERENCES
 Liguang Xie; Yi Shi; Hou, Y.T.; Lou, A., "Wireless power transfer and
applications to sensor networks," Wireless Communications, IEEE ,
vol.20, no.4, pp.140,145, August 2013.
 Sazonov, Edward; Neuman, Michael R. (2014). Wearable Sensors:
Fundamentals, Implementation and Applications. Elsevier. pp. 253–
255. ISBN 0124186661. Agbinya, Johnson I. (2012). Wireless Power
Transfer. River Publishers. pp. 1–2. ISBN 8792329233.
 Agbinya (2012) Wireless Power Transfer, p. 126-129.
 Umenei, A. E. (June 2011). “Understanding Low Frequency Non-
radiative Power Transfer” (PDF). Fulton Innovation, Inc. Retrieved 3
January 2015.

18. contd….
 Davis, Sam (July 2011). “Wireless power minimizes interconnection
problems” (PDF). Power Electronics Technology. Penton Electronics
Group: 10–14. Retrieved 16. January 2015.
 Puers, R. (2008). Omnidirectional Inductive Powering for Biomedical
Implants. Springer Science & Business Media. pp. 4–5. ISBN
1402090757.
 Wong, Elvin (2013). “Seminar: A Review on Technologies for
Wireless Electricity”. HKPC. The Hong Kong Electronic Industries
Association Ltd. Retrieved 3 January 2015.
 Tan, Yen Kheng (2013). Energy Harvesting Autonomous Sensor
Systems: Design, Analysis, and Practical Implementation. CRC Press.
pp. 181–182. ISBN 1439892733.

20. ANY QUERIES??