WIRELESS POWER TRANSMISSION

Presented ByArnab Mondal, Arindam Mondal, Akshay Mondal, Arindam Saha, Mithun Chakrabarty

Department of Electrical Engineering

CALCUTTA INSTITUTE OF TECHNOLOGY

Overview1. What is Wireless Power

Transmission ?2. Why WPT?3. History 4. Modification 5. Wireless Power Transmission

System6. Components of WPTS7. Advantages and disadvantages8. Biological Impacts9. Applications10. Conclusions11. References

Wireless power Transmission

Transmitting power without using wires i.e. as a microwaves from one place to another in order to reduce the transmission and distribution losses.

WHY WIRELESS POWER TRANSMISSION ?

1. 26% POWER BEING LOSSED DURING DISTRIBUTION AND TRANSMISSION DUE TO RESISTANCE OF WIRES USED FOR GRID.

2. ACCORDING TO WORLD RESOURCES INSTITUTE INDIA’S ELECTRICITY GRID HAS THE HIGHEST TRANSMISSION & DISTRIBUTION LOSSES IN THE WORLD.

3. AVOID POWER THEFT.

HISTORY

1. SIR NIKOLA TESLA DEMONSTRATED ‘THE TRANSMISSON OF ELECTRICAL ENERGY WITHOUT WIRES’ IN 1893.

HISTORY

2. THE WARDENCLYFFE TOWER DESIGNED BY TESLA.

HISTORY SIR WILLIAM C BROWN, ‘ THE PIONEER ‘ IN WIRELESS POWER TRANSMISSION TECHNOLOGY

MODIFICATION

MICROWAVE POWER MODEL HELICOPTER

MODIFICATIONS

SHARP- Stationary High Altitude Relay Platform, the world first fuel free airplane powered by microwave energy from ground in 1987 at Canada.

MIT PROJECT

WITRICITY PROJECT BASED ON RIC LED BY MIT PROF. MARIN SOLJACIC

WPTS (Contd…)1. IN TRANSMISSION SIDE ;

MICROWAVE POWER SOURCE GENERETES MICROWAVE POWER AND OUTPUT POWER IS CONTROLLED BY CIRCUIT.

2. THE WAVE GUIDE FERRITE CALCULATOR WHICH PROTECTS THE SOURCE IS CONNECTED WITH COAX – WAVE GUIDE ADAPTOR.

3. TUNER MATCHES THE IMPEDANCE BETWEEN THE TRANSMISSION ANTENNA AND SOURCE.

4. THE ATTENUATED SIGNALS WILL BE THEN SEPERATED BASED ON THE DIRECTION OF SIGNAL PROPAGATION BY DIRECTIONAL COUPLER.

WPTS5. THE TRANSMITTING ANTENNA RADIATES THE POWER UNIFORMLY THROUGH FREE SPACE TO RECTENNA.6. RECTENNA RECEIVES THE TRANSMITTED POWER AND CONVERT THE MICROWAVE POWER INTO DC POWER.7. THE RECTIFYING CIRCUIT CONSISTS OF SCHOTTKY BARRIER DIODES CONVERTS THE RECEIVED MICROWAVE POWER INTO DC POWER.

COMPONENTS OF WPTS

1. MICROWAVE GENERATOR

COMPONENTS OF WPTS

2. TRANSMITTING ANTENNA

COMPONENTS OF WPTS

3. RECTENNA (IN US RECTENNA RECEIVES 5000MW OF POWER.)

PROS….AND CONS…• ADVANTAGES• RELIABLE• EFFICIENT• FAST• LOW MAINTAINANCE COST• CAN BE USED COUSTOMLY.• NO WIRE• NO WASTE OF POWER

• DISADVANTAGES• DISTANCE CONSTRAINS• FIELD STRENGTH HAVE TO BE

UNDER SAFETY LEVEL.• INITIAL COST IS HIGH• HIGH FREQUENCY SUPPLY MUST

BE THE SUPPLY.

BIOLOGICAL IMPACT

COMMON BELIEFS FEAR THE EFFECT OF MICROWAVE RADIATION. BUT THE STUDIES IN THIS DOMAIN REPEATEDLY PROVES THAT THE MICROWAVES RADIATION LEVEL WOULD BE NEVER HIGHER THAN THE DOSE RECEIVED WHILE OPENING THE MICROWAVE OVEN DOOR MEANS IT IS SLIGHTLY HIGHER THAN THE EMISSIONS CREATED BY CELLULAR TELEPHONES.

APPLICATIONS NEAR FIELD ENERGY TRANSFER: 1. ELECTRIC AUTOMOBILE CHARGING 2. CONSUMER ELECTRONICS 3. INDUSTRIAL PURPOSES FAR FIELD ENERGY TRANSFER 1. SOLAR POWER SATELITIES 2. ENERGY TO REMOTE AREAS 3. CAN BROADCAST ENERGY GLOBALLY

CONCLUSION

1. TRANSMISSION WITHOUT WIRES- A REALITY2. EFFICIENT3. ENERGY CRISIS CAN BE DECREASED4. LOW LOSS5. IN NEAR FUTURE, WORLD WILL BE COMPLETELY WIRELESS.

REFERENCES

1. SLIDESHOW 2. GOOGLE 3. INTERNATIONAL JOURNAL OF COMPUTER APPLICATION(0975-8887)