A PRACTICAL WIRELESS CHARGING SYSTEM BASED ON UWB RETRO- REFLECTIVE BEAMFORMING RAJESH KUMAR S 1AP07EC032 VIII SEM ECE APSCE
A PRACTICAL WIRELESS CHARGING SYSTEM BASED ON UWB RETRO-
REFLECTIVE BEAMFORMING
RAJESH KUMAR S
1AP07EC032
VIII SEM ECE
APSCE
OVERVIEW OF WIRELESS CHARGING :
• WHAT IS WIRELESS CHARGING ?
• HISTORY OF WIRELESS CHARGING.
• NEED FOR WIRELESS CHARGING ?
TYPES OF WIRELESS CHARGING :
1. INDUCTIVE CHARGING.
2. RESONANANT CHARGING.
3. MICROWAVE POWER TRANSFER.
INDUCTIVE CHARGING :
• Works on Electromagnetic Induction.
• Two coils with alternating polarity.
• Range: 1cm or less.
• Charger output: 850mA
INDUCTION CHARGING (cont)
• Disadvantage : low efficiency, resistive heating.
• Generally available in form of Charging pads and electrical tooth brushes.
RESONANT CHARGING :
• Works on resonance phenomenon.
• Coils are tuned to same frequency.
• Frequency range : 1MHz to 20 MHz.
• Distance: 3-5 meter.
RESONANT CHARGING (contd)
• Power transfer not affected by room geometrics.
• Efficiency decreases due to obstacles between two coils.
• Witricity works on resonant 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.
LAPTOP CHARGING USING WITRICITY :
MICROWAVE POWER TRANSFER :
• USES MICROWAVES.
• RANGES FROM : 1GHz to 30 GHz.
• DISTANCE : METERS TO KILO-METERS.
• CONTINUOUS POWER SUPPLY.
• DISADVANTAGE : LINE-OF-SIGHT.
AC SUPPLY
TYPICAL WIRELESS CHARGING SYSTEM :
RECTIFIER AMPLIFIER
RECTIFIER
TRANSMITTING SYSTEM
ELECTRONIC EQUIPMENT
RECEIVING SYSTEM
WIRELESS CHARGING USING UWB BEAMFORMING :
NUMERICAL MODEL :
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.
APPLICATIONS :
1. DIRECT CHARGING.
2. AUTOMATIC CHARGING.
CONSUMER APPLICATIONS :• MOBILE ELECTRONIC
DEVICES.
• DESTOP PC PERIPHERALS.
INDUSTRIAL APLLICATION :• WIRELESS SENSORS &
ACTUATORS.
• DRILLERS, MINING TOOLS IN HARSH ENVIRONMENTS.
TRANSPORTATION APPLICATION :• ELECTRIC VEHICLES.
• REMOTE KIOSKS.
• MOBILE ROBOTS.
OTHER APPLICATIONS :• MEDICAL DEVICES.
• SMART CARDS.
• CONSUMER APPLIANCES.
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.
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.
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.
THANK YOU