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A PRACTICAL WIRELESS CHARGING SYSTEM BASED ON UWB RETRO- REFLECTIVE BEAMFORMING RAJESH KUMAR S 1AP07EC032 VIII SEM ECE APSCE
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Page 1: Wireless Charging

A PRACTICAL WIRELESS CHARGING SYSTEM BASED ON UWB RETRO-

REFLECTIVE BEAMFORMING

RAJESH KUMAR S

1AP07EC032

VIII SEM ECE

APSCE

Page 2: Wireless Charging

OVERVIEW OF WIRELESS CHARGING :

• WHAT IS WIRELESS CHARGING ?

• HISTORY OF WIRELESS CHARGING.

• NEED FOR WIRELESS CHARGING ?

Page 3: Wireless Charging

TYPES OF WIRELESS CHARGING :

1. INDUCTIVE CHARGING.

2. RESONANANT CHARGING.

3. MICROWAVE POWER TRANSFER.

Page 4: Wireless Charging

INDUCTIVE CHARGING :

• Works on Electromagnetic Induction.

• Two coils with alternating polarity.

• Range: 1cm or less.

• Charger output: 850mA

Page 5: Wireless Charging

INDUCTION CHARGING (cont)

• Disadvantage : low efficiency, resistive heating.

• Generally available in form of Charging pads and electrical tooth brushes.

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RESONANT CHARGING :

• Works on resonance phenomenon.

• Coils are tuned to same frequency.

• Frequency range : 1MHz to 20 MHz.

• Distance: 3-5 meter.

Page 7: Wireless Charging

RESONANT CHARGING (contd)

• Power transfer not affected by room geometrics.

• Efficiency decreases due to obstacles between two coils.

• Witricity works on resonant charging.

Page 8: Wireless Charging

WITRICITY :

• WITRICITY means wireless electricity.

•The first experiment of witricity, was conducted in the year 2006, by researchers from MIT.

• A physics research group, led by Prof. Marin Soljacic, at MIT, wirelessly powered a 60W light bulb with 40% efficiency at a 2 meters distance using two 60 cm-diameter coils.

Page 9: Wireless Charging

LAPTOP CHARGING USING WITRICITY :

Page 10: Wireless Charging

MICROWAVE POWER TRANSFER :

• USES MICROWAVES.

• RANGES FROM : 1GHz to 30 GHz.

• DISTANCE : METERS TO KILO-METERS.

• CONTINUOUS POWER SUPPLY.

• DISADVANTAGE : LINE-OF-SIGHT.

Page 11: Wireless Charging

AC SUPPLY

TYPICAL WIRELESS CHARGING SYSTEM :

RECTIFIER AMPLIFIER

RECTIFIER

TRANSMITTING SYSTEM

ELECTRONIC EQUIPMENT

RECEIVING SYSTEM

Page 12: Wireless Charging

WIRELESS CHARGING USING UWB BEAMFORMING :

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NUMERICAL MODEL :

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ADVANTAGES & LIMITATIONS :

ADVANTAGES• Can supply power to

moving devices. • High Efficiency Over

Distance .• No need for power cables

and batteries. • Flexible Geometry Allows

charging Devices to be Embedded Into Products

LIMITATIONS• Line of sight.• Biological impact.• OEM.

Page 15: Wireless Charging

APPLICATIONS :

1. DIRECT CHARGING.

2. AUTOMATIC CHARGING.

Page 16: Wireless Charging

CONSUMER APPLICATIONS :• MOBILE ELECTRONIC

DEVICES.

• DESTOP PC PERIPHERALS.

Page 17: Wireless Charging

INDUSTRIAL APLLICATION :• WIRELESS SENSORS &

ACTUATORS.

• DRILLERS, MINING TOOLS IN HARSH ENVIRONMENTS.

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TRANSPORTATION APPLICATION :• ELECTRIC VEHICLES.

• REMOTE KIOSKS.

• MOBILE ROBOTS.

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OTHER APPLICATIONS :• MEDICAL DEVICES.

• SMART CARDS.

• CONSUMER APPLIANCES.

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CONCLUSION :

By the above paper we can conclude that using the UWB technique the practical implementation of the proposed wireless charging system is possible without causing any biological impacts on human.

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FUTURE SCOPE :

• In the future, the research has to be done on the possible biological impacts and the technology to minimize them.

• A universal charging station could be developed.

• Electricity can be generated using fossil fuels and transmitted to the required area.

• Global energy grid could be set up in space orbit.

Page 22: Wireless Charging

REFERENCES & BIBLIOGRAPHY :

[1] J. D. Lan Sun Luk, A. Celeste, P. Romanacce, L. Chane Kuang Sang, and J. C.

Gatina, "Point-to-point wireless power transportation in reunion island," presented at

48th International Astronautical Congress, Turin, Italy, October 1997.

 

[2] A. Kurs, A. Karalis, R. Moffatt, J. D. Joannopoulos, P. Fisher, and M. Soljacic,

"Wireless power transfer via strongly coupled magnetic resonances," Science, vol.

317, pp. 83-86, July 2007.

 

[3] B. E. Henty and D. D. Stancil, "Multipath-enabled super-resolution for rf and

microwave communication using phase-conjugate arrays," Physical Review Letters,

vol. 93, pp. 243904, December 2004.

 

[4] L. Chiu, T. Y. Yum, W. S. Chang, Q. Xue, and C. H. Chan, "Retrodirective array for

RFID and microwave tracking beacon applications," Microwave and Optical

Technology Letters, vol. 48, no. 2, pp. 409-411, February 2006.

 

[5] H. Zhai, S. Sha, V. K. Shenoy, S. Jung, M. Lu, K. Min, S. Lee, and D. S. Ha, “An

electronic circuit system for time-reversal of ultra-wideband short impulses based on

frequency domain approach,” IEEE Transactions on Microwave Theory and

Techniques, vol. 58, no. 1, pp. 74-86, January 2010.

Page 23: Wireless Charging

THANK YOU