wirelesspoertransmission.ppt

Presented by

MD.UBAID THOUFIQ

VIVEK KANDIMALLA

INTRODUCTION

DEFINITION

HISTORY

TYPES OF WPT Atmospheric conduction method Electrodynamic induction method

Advantages and disadvantage

Applications

Conclusion

References

2Wireless Power Transmission

The main reason for power loss during T/D is the resistance of wires

used in grid

According to the World Resources Institute (WRI), India’s electricity

grid has the highest T/D losses in the world – a whopping 27-40%

Tesla proposed methods of transmission of electricity using

electromagnetic induction

As the word wireless means “without wire”.

Wireless energy transfer or wireless power is the transmission of

electrical energy from a power source to an electric load without

interconnecting man made conductors.

Wireless transmission is useful in cases where interconnecting wires

are inconvenient, hazardous or impossible.

Sir NICOLAI TESLA was the first one to propose and research the idea ofwireless transmission in 1899, since than many scholars and scientistshave been working to make his dream a reality.

• 1899: Tesla continues wireless power transmission research in ColoradoSprings and writes, "the inferiority of the induction method would appearimmense as compared with the disturbed charge of ground and airmethod

• 1961: William C. Brown publishes an article exploring possibilities of microwave power transmission

• 2009: Sony shows a wireless electrodynamics-induction powered TV set, 60 W over 50 cm

Different methods of transmission proposed by differentscientist and scholars are:

1. Atmospheric conduction method of Tesla

2. Electro dynamic induction method: Microwave method Laser method

• Economically challenging

• Periodic changes in atmospheric condition

• Maintaining high tower potential every time

Near-field energy transfer

Electric automobile charging

Static and moving

Consumer electronics

Industrial purposes

Harsh environment

Far-field energy transfer

Solar Power Satellites

Energy to remote areas

Can broadcast energy globally (in future)

8Wireless Power Transmission

Efficient

Easy

Need for grids, substations etc are eliminated

Low maintenance cost

More effective when the transmitting and receiving points are along a

line-of-sight

Can reach the places which are remote

9Wireless Power Transmission

When microwaves are used, interference may arise

When LASERS are used, conversion is inefficient due to absorption losses.

It is radioactive in nature

Distance constraint , initial cost is high.

Field strength has to be under safety levels

High frequency signals should be supplied for air ionization which is not

feasible.

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

11Wireless Power Transmission