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dineshkumar · 08-16-2017, 10:13 PM

PRESENTED BY Big Grin

EEPAK KUMAR

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Outline
Introduction.
Background.
Microwave Power Transmission And Reception Technique.
Current Design of Rectenna.
Advantage of Using Microwaves For Wireless Electricity Transmission.
System Losses Of Wired Electricity Transmission.
Advantages Of Wireless Electricity Transmission.
Disadvantages Of Wireless Electricity Transmission.
Issues And Conclusions.

Wireless Electrical Transmission as the name shows is the Transmission of Electrical Energy without wires to any place on Earth. Even to the most remote areas.
The Electrical energy is first converted into Microwaves then beamed to a Geosynchronous satellite and Beamed back on Earth where needed and converted back to electrical energy. Where it can be used to power Electrical Equipments.
Background

Innovations
Alternating Current.
Wireless Power Transmission Experiments at Wardenclyffe.
In 1899 Nikola Tesla was able to light lamps over 25 miles away without using wires. Also the high frequency current of tesla coil, could light lamps filled with gas (like Neon).
1940s to Present
World war II developed ability to convert energy to microwave using magnetron but no method to convert microwave back to electricity.
In 1964 William. C Brown demonstrated a Rectenna which would convert Microwaves Power to Electricity.

Wireless Electricity Transmission And Reception Using Microwaves
Microwaves generated using the Magnetron from the base station can be received at any location on Earth with the help of Geosynchronous Receiving and Transmitting Satellites. Advantages of Low Orbit And Geosynchronous Satellites: * These satellites will use microwaves to beam power to the receiving station and mobile power receiving devices. * Since The low Orbit Microwave Beam Would spread less, the ground based Rectenna could be smaller.
Microwave Power Transmission And Reception Technique
Rectenna Design
5000 Mw Receiving Station (Rectenna). This station is about a Mile and Half long.
The Rectenna Would be Visually Transparent so that it would not interfere with Plant life.
Advantages of Using Microwaves for Wireless Electricity Transmission
High Efficiency Up to 85% .
Power Level is Well Below International safety standard.
Beam is far below the lethal levels of concentrations even for a prolonged exposure.
Frequency is up to 2.45 GHz of the Micro Beam.
Retro-directive Beam Control capability.
No Air Or water Pollution is Created.
During Generation power can be Beamed to the location Where it is needed.
We don t have to invest in a large Electrical Grid.
If Microwave Beams Carrying power could be beamed uniformly over the earth they could power cell phones, but the antenna length should be 25-30 cm square.

System Losses Of Wired Electricity Transmission
Advantages Of Wireless Electricity Transmission
Power Loss is very less as compared to Wired Electricity Transmission.
There is no need of Transmission Lines.
Health and Environmental Experiments claim that Wireless Electricity Transmission Using Microwaves and laser is safe.

Disadvantages of wireless Electricity Transmission
The Size of Rectenna will be Massive.
Would Require a Network of hundreds of satellites.
The Cost of this Prototype Project Will Be $74 Billion approx.
Interference with other Electronic Devices will be there.

Issues
More Reliable Than Ground Based Solar Power Generation.
More Reliable Than Wired Electricity Transmission.
In Order To Have Wireless Electricity Transmission To Become a Reality, Following Things Have To Happen:
#Government Support.
#Cheaper Launch Prices.
#Involvement Of The Private Sector.

arun m r · 08-16-2017, 10:13 PM

WE DEVELOP A wireless power transmission system for the Duke SmartHome.
This power-transmitting surface is built into the frame of a 35 x 32 cm wooden cabinet
and is able to transmit tens of watts of electrical power to power multiple devices
simultaneously. We have successfully powered multiple devices including an alarm clock,
a USB light, an LED, a USB toy and an iPhone. We have also managed to power 4
iPhones simultaneously.
Existing techniques of wireless power transmission involving a pair of strongly
magnetically coupled resonators allow transmission of tens of watts of power over a few
meters [4]. By introducing high Q L-C resonators, researchers are able to efficiently
transfer power from one resonant transmitter to another resonant receiver. However,
efficiency greatly deteriorates upon adding more receivers to the strongly coupled system
because of the interactions between multiple coupled resonators.
We observe that many consumer electronics for example laptops, desk lamps,
alarm clocks etc operate off a surface such as a desk or a cabinet. In our research and
implementation of a wireless power transmission system, we transmit near field wireless
power with a goal not to maximize the distance of power transmission, but rather, to
power devices on a surface. Our objective is to allow the introduction of numerous nonresonant
pick up coils to enable multiple devices to be powered on the surface at once
with only one resonant transmitter.
With the goal of powering multiple devices with a single transmitter, we design a
system that drives a primary inductor that is coupled with a high Q L-C secondary
resonator. Design parameters such as drive frequency, number of turns of resonant coil,
type of wire used etc are determined by computer modeling. MATLAB is used to model
the behavior of inductive power transfer and PSpice is used to model the behavior of the
transmitter and receiving systems respectively.

SEMINARSEC · 08-16-2017, 10:13 PM

ABSTRACT
Can we imagine the life without electrical wires? From now answer to this question is Yes. The method proposed in the present paper called Witricity will facilitate to Transfer power without using wires. The efficient midrange power can be transmitted to any device which uses that range of power by the technique used in this Witricity concept.
Now a days there is a Rapid development of autonomous electronics like Laptops, Cell-phones, House-hold robots and all the above devices typically rely on chemical energy storage(Battery) .As they are becoming daily needs to present generation, Wireless energy transfer would be useful for many applications as above and they need midrange energy. This is the main reason to prepare this paper.
When two Magnetically Resonating objects at Strongly coupled regime tend to exchange energy efficiently by transfer of power in the non-radiating fields. This is the basic principle involved in it. By taking two coils having same magnetic resonance and one is coupled to source and other is coupled to Device. So that the energy transfer is efficient even the air gap between them is high.
This paper describes the basic history of wireless power transmission, what are Magnetic resonance and Strongly coupled regime, Experimental design, Range and rate of coupling (coupling calculations) and Design of parameters and Simulation for variation of power with and without the external object between source and load.

Meghana G · 08-16-2017, 10:13 PM

sumeshm.pnr · 08-16-2017, 10:13 PM

simran · 08-16-2017, 10:13 PM

soorya · 08-16-2017, 10:13 PM

1. Wireless power transmission can be possible only in few meters.
2. Efficiency is only about 40%.
As witricity is in development stage, lot of work is done for improving the efficiency and distance between transmitter and receive

read http://seminarsprojects.net/Thread-witri...ull-report and http://seminarsprojects.net/Thread-wirel...ull-report for getting more information regarding the idea Wireless Electricity ,if you want again more "information"/"specific details" then please relply (with details) in that page , hope our friends like you may add their thought to help you

i hope you enjoyed it
if yes,i welcomes you to make an active participation in seminars/project/technical discussions here for helping other students issues , or hope you next time come with a good idea and will apreciate everyone

Best Wishes..

sachinjain7882 · 08-16-2017, 10:13 PM

Akhil Rajasekaran · 08-16-2017, 10:13 PM

hello sir
i am a btech electrical engineering student and have a seminar and dis topic seems appealing to be as it is yet to be used in full flow.and have a high prospective in future.
hence i will be feel very obliged if you send me dis paper as soon as possible.so that i would gain some knowledge and able to put dis in front of other.
thank you
pradumna kumar
electrical engineering student
orissa.

simiwatson · 08-16-2017, 10:13 PM

Yes, this is indeed an area where more innovations have to come. The possibilities are infinite. For an introduction and report on this topic, please visit this thread:
http://seminarsprojects.net/Thread-wirel...ull-report