wireless electric system

7/28/2019 Wireless Electric System

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BY

PRIYA MITTAL

4TH Year B.Tech EEE 8TH Sem

2108649


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WIRELESS TRANSMISSION


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NEED OF WIRELESS

TRANSMISSION

Now a days there is a Rapid development of autonomous electronicslike Laptops, Cell-phones, House-hold robots and all those devices

typically rely on chemical energy storage(Battery) As they are

becoming daily needs to present generation, Wire less energy

transfer would be useful for many applications as above and they

need midrange energy


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INTRODUCTION

The term wireless transmission stands forinterchange of power, electricity, data or any othertype of information.

According to the electrical point of view,

transmission lines are used for transmitting powersupply.

But there is a major risk of electrical hazards likeshort circuits, power failure, & breakdown oftransmission lines.

So, we have suggested an innovative idea toovercome all these electrical hazards.

JUST REMOVE THE TRANSMISSION LINES !

For this, we have used microwaves .


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WHAT ARE MICROWAVES ?

we are very familiar to microwave ovens.

We have implemented the principle of microwaveovens for our receivers & transmitters.

Microwaves have wavelengths approximately in therange of 30 cms (freq= 1 GHz ) to 1 mm (freq= 300

GHz ). The term microwaves generally refers to A.C.

signals with frequencies between 300 MHz & 300GHz.

The microwave range includes ultra high

frequencies ( 0.3-3 GHz ), super high frequencies(3-30 GHz ), & extremely high frequencies (30-300GHz ) signals.

We have used these microwaves for our wirelesstransmission.
http://en.wikipedia.org/wiki/Image:Atmospheric_microwave_transmittance_at_mauna_kea%28simulated%29.gif


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HOW IT WORKS ?

Here, the power (electricity) generatedat sub-station goes to the transmitter,which works like the principle ofmicrowave oven

This transmitter converts theelectricity into microwaves & transmitthem to our service towers

When these transmitted waves reachat the desired tower, (HOMETOWER), the receiver of home towerreceives these microwaves & convertsthem into electricity.The electricity isutilized for our home appliances.
http://en.wikipedia.org/wiki/Image:Milfordsun300.jpg


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MPT METHOD

MICROWAVE POWER TRANSMISION ( MPT )method is the use of microwaves to transmit powerthrough outer space or the atmosphere without theneed for wires.

In 1964, William C. Brown demonstrated a miniaturehelicopter equipped with a combination antenna &rectifier called as rectenna.

The rectenna converted microwave power intoelectricity , allowing the helicopter to fly.

In principle, rectenna is capable for very highconversion efficiencies over 90% in optimalcircumstances.

Most proposed MPT systems includes a phased arraymicrowave transmitter.

They have advantage of being electrically steered andeasier to scale the necessary levels that a practical MPTsystem requires.


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Wireless switching

Now further we can use the microwaves received by ourhome tower for wireless switching also

By using wireless switching, we can make the wholetransmission wireless....from sub-station to our home

appliances. There is no need of electrical wires to control our electric

home appliances like fans, tube lights, washingmachines etc


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How wireless switching works ?

for wireless switching, we use a TRANSCIEVER, acombo of transmitter & receiver, in our home tower.

This receives & transmits the microwaves directly to thetransceiver of our hand held remote control.

Now we can control our home appliances by operatingthis hand-held remote control

Now the microwaves transmitted by this remote controlare received by the receiver of our home appliance.

And thus, we can control our home applianceswirelessly.


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wireless electric system

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