Wireless Power Transmission (WPT) is the process of transmitting energy without wires, utilizing various technologies to overcome energy loss during conventional wired transfers. Key methods include inductive coupling, resonant inductive coupling, microwave power transmission, and laser power transmission, offering benefits such as efficiency and low maintenance, although they come with high initial costs and potential safety concerns. The future of WPT suggests a shift towards a fully wireless energy system with applications ranging from electric vehicle charging to global energy broadcasting.

1. LET ME TAKE YOU TO THE WORD OF FUTURE POWER
WELCOME TO FUTURE

2. WIRELESS POWER TRANSMISSION
Presented by
ALAPATI BHARADWAJ KRISHNA
111517106003
ELECTRONICS AND COMMUNICATION
ENGINEERING
R.M.D.ENGINNEERING COLLEGE

3. SO
WIRELESS POWER
TRANSMISIION
WHAT IS
WIRELESS POWER
TRANSMISSION?
WHY IS WPT?
TYPES OF WPT?
ADVANTAGES
AND
DISADVANTAGES
APPLICATIONS
CONCLUSION
AND
REFERENCES

4. 1. The transmission of energy from one place to another without using wires
2.. Conventional energy transfer is using wires.
3. But, the wireless transmission is made possible by using various technologies…

5. 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%

6. WHY WPT?
Reliable
Efficient
Fast
Low maintenance cost
Can be used for short-range or long-range.

7. Nikola Tesla in late 1890s
Pioneer of induction techniques
His vision for “World Wireless System”
The 187 feet tall tower to broadcast energy
All people can have access to free energy
Due to shortage of funds, tower did not operate
Tesla was able to transfer energy from one coil to another coil
He managed to light 200 lamps from a distance of 40km
The idea of Tesla is taken in to research after 100 years by a team led by Marin Soljačić from MIT.
The project is named as „WiTricity‟.

8. Near-field techniques
Inductive Coupling
Resonant Inductive Coupling
Air Ionization
Far-field techniques
Microwave Power Transmission (MPT)
LASER power transmission
Types and Technologies of WPT

9. INDUCTIVE COUPLING
Primary and secondary coils are not connected with wires.
Energy transfer is due to Mutual InductionTransformer is also an example Energy transfer devices are usually
aircored Wireless Charging Pad(WCP),electric brushes are some examples
On a WCP, the devices are to be kept, battery will be automatically charged. Less use of wires
Shock proof

10. RESONANCE INDUCTIVE COUPLING (RIC)
Combination of inductive coupling and resonance
Resonance makes two objects interact very strongly
Inductance induces current

12. Toughest technique under near-field energy transfer techniques
Air ionizes only when there is a high field
Needed field is 2.11MV/m
Natural example: Lightening
Not feasible for practical implementation

13. Radiative
Needs line-of-sight
LASER or microwave
Aims at high power transfer
Tesla‟s tower was built for this

14. Transfers high power from one place to another. Two places being in line of sight usually
Steps:
◦ Electrical energy to microwave energy
◦ Capturing microwaves using rectenna
◦ Microwave energy to electrical energy AC can not be directly converted to microwave energy
AC is converted to DC first
DC is converted to microwaves using magnetron
Transmitted waves are received at rectenna which rectifies, gives DC as the output
DC is converted back to AC

15. LASER is highly directional, coherent
Not dispersed for very long
But, gets attenuated when it propagates through atmosphere
Simple receiver
◦ Photovoltaic cell
Cost-efficient

16. APPLICATIONSNear-field energy transfer
◦ Electric automobile charging
Static and moving
◦ Consumer electronics
◦ Industrial purposes
Harsh environmentFar-field energy transfer
◦ Solar Power Satellites
◦ Energy to remote areas
◦ Can broadcast energy globally (in future)

17. ADVANTAGES
DIS-ADVANTAGES
Reach
The initial investment to be high
Reduced power failure
Low efficiency over long distances
Reducing the losses
Security
Almost no maintenance
Interference
Easy installation
A clear line of sight
Economic
Causing damage to tissues of human and
other living organisms

18. CONCLUSION
Transmission without wires- a reality
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

19. ReferencesS. Sheik Mohammed, K. Ramasamy, T. Shanmuganantham,” Wireless power transmission – a next
generation power transmission system”, International Journal of Computer Applications (0975 – 8887)
(Volume 1 – No. 13) Peter Vaessen,” Wireless Power Transmission”, Leonardo Energy, September 2009
C.C. Leung, T.P. Chan, K.C. Lit, K.W. Tam and Lee Yi Chow, “Wireless Power Transmission and Charging
David Schneider, “Electrons unplugged”, IEEE Spectrum, May 2010 Shahrzad Jalali Mazlouman,
Mahanfar, Bozena Kaminska, “Mid-range Wireless Energy Transfer Using Inductive Resonance for
Sensors” Chunbo Zhu, Kai Liu, Chunlai Yu, Rui Ma, Hexiao Cheng, “Simulation and Experimental
on Wireless Energy Transfer Based on Magnetic Resonances”, IEEE Vehicle Power and Propulsion
Conference (VPPC), September 3-5, 2008