A PRESENTATION ON

Presented to:

MRS.UMARANI MADAM

Department of Urban and Regional Planning,School of Planning and Architecture,Jawaharlal Nehru Technological University,Hyderabad.

Presented by:

PRADEEP080523

History of Wireless Power: In 1899, Sir Nikola Tesla Proposed a

method of Wireless Power Transmission.

As it is in Radiative mode, most of the

Power was wasted and has less efficiency.

The efficient midrange power

transfer concept is Witricity. In this

model source and load are in Magnetic

resonance so there is no power loss.

RESONANCE COUPLING

A group of engineers at MIT

came up with the idea to use

resonant induction

to transmit power wirelessly.

“Resonance", a phenomenon that causes an object to vibrate when energy of a certain frequency is applied.

The forgotten invention is reborn in 2007

About the Technology

Wireless energy transfer is the process that takes place in any system where

electrical energy is transmitted from a power source to an electrical load,

without interconnecting wires

Wireless transmission is useful in cases where

instantaneous or continuous energy transfer is

needed, without connecting wires.

Most common form of wireless power is

carried out, using electrodynamic induction ,

microwaves or lasers

WORKING

2 copper coils are setup-one at the ‘sender end’ and other at the

‘receiving end’. The sender coil is attached to a power source and the

receiver is attached to a light bulb

When turned on, the sender coil emits electricity in the form of magnetic

field, oscillating at a specific freq

The receiver coils picks up the transmission while the rest of the

environment remains unaffected

NEED

Now a days there is a Rapid development

of autonomous electronics like 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.

What is Witricity?

• Electricity without wires

• Magnetic loop antennas

• Electromagnetic near-field

WORKING

• Near-field inductive coupling through magnetic fields

• Interact weakly with surrounding objects (biological tissue)

Witricity Today

• MIT powered 60 watt light bulb from 2 meters (7 ft) at 40% efficiency

• MIT researchers working on improving the technology

• 1969-1975 30 kW over 1 mile at 84% efficiency

Witricity Tomorrow

1) Power from mains to antenna, which is made of copper

2) Resonates 10MHz (electromagnetic waves)

3) Tunnel up to 2m (6.5ft)

4) Electricity received by antenna, also resonating at 10MHz.

5) Energy not transferred to laptop re-absorbed by source antenna.

People/other objects not affected as not resonating at 10MHz

Basic Principle

The basic principle involved in Witricity concept is, Two objects

having same resonating frequency and in Magnetic resonance at Strongly

coupled regime tend to exchange energy , while dissipating relatively little

energy to the extraneous off-resonant objects.

WORLD IN OUR DREAM

ADVANTAGES

•Unaffected by the day night cycle, weather or seasons.

•This is an eco friendly system

•It is boon for the devices which uses midrange power

•Non-Radiative Energy Transfer is Safe for People and Animals.

•Your home would keep your gadgets constantly powered up

•Could eliminate batteries

APPLICATIONS

Direct Wireless Power.

Automatic Wireless Charging - charging mobiles and laptops i.e. devices that

use batteries for operation

Industrial - Direct wireless power for wireless sensors and actuators.

Transportation - Automatic wireless charging for existing electric vehicle

classes: golf carts, industrial vehicles

LEARNINGS

The Wireless transfer of electricity had been a Sci-fi Dream upto this point,

and truly, if electricity is just in the air as radio waves or wi-fi, it is going to

change the world.

The key learnings from this study are:

Basic understanding of the electronics industry

The basic mechanism as to how the coils work