By Abner Molina UTA REU Summer 2013 Group: Dr. Chiao Midterm Presentation Date: 7/9/2013 WIRELESS POWER TRANSMISSION.

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Presentation transcript:

By Abner Molina UTA REU Summer 2013 Group: Dr. Chiao Midterm Presentation Date: 7/9/2013 WIRELESS POWER TRANSMISSION

OVERVIEW Experimental Objective Introduction Background Information Materials Procedure Data/Observations Results Conclusion

EXPERIMENTAL OBJECTIVE Increase efficiency of wireless power being transmitted through: Different design of antennas (repeaters) Different circuitry: Class E amplifier Phase lock loop (PLL)

INTRODUCTION Done by Peter Woods

BACKGROUND INFORMATION University of Hong Kong conducted study in Mid-Range Wireless Power Transfer With: 2-coil systems 4-coil systems Coils used in study were all radial[1] Goal is coming up with a better design

BACKGROUND INFORMATION Designs: Repeater 1: Inductance93.36 μH Outer Radius18 cm Inner Radius5 cm Spacing0.5 cm

BACKGROUND INFORMATION Repeater 2: Inductance40.74 μH Outer Radius18 cm Inner Radius14 cm Spacing0.5 cm

BACKGROUND INFORMATION Repeater 3: Inductance28.72 μH Outer Radius18 cm Inner Radius5 cm Spacing1 cm

BACKGROUND INFORMATION Repeater 4, Reciever, Transmitter: Inductance176.3 μH Outer Radius18 cm Turns10

BACKGROUND INFORMATION Class E Amplifier RF choke allows DC current to flow when switch on Blocks AC signals when switch off Shunt capacitor charges and discharges in on-off cycle Tuning allows fundamental sinusoid to appear at ouput [2 ] Tuning allows circuit to be at resonating frequency Max power

BACKGROUND INFORMATION Class E Amplifier [2]

MATERIALS Litz Wire Antenna Frame Capacitors Oscilloscope Function Generator DC Power Supply

PROCEDURE Set Up

DATA/OBSERVATIONS (40 CM)

DATA/OBSERVATIONS (60 CM)

DATA/OBSERVATIONS (80 CM)

RESULTS 40 CM Repeater 1 produce higher efficiency 60 CM Repeater 1 produce higher efficiency 80 cm Repeater 3 produce higher efficiency

CONCLUSION Repeater 1 produced higher efficiency for: 40 cm 60 cm Repeater 3 produced higher efficiency for 80 cm Test designs using PLL Using new Litz wire Produce more control experiments Incorporate LABView for precise results

ACKNOWLEDGMENTS [1] Lee, C.K.; Zhong, W.X.; Hui, S.Y.R., "Recent progress in mid-range wireless power transfer," Energy Conversion Congress and Exposition (ECCE), 2012 IEEE, vol., no., pp.3819,3824, Sept doi: /ECCE [2] Tao Wang. “Optimized Class-E RF Power Amplifier Design in Bulk CMOS.” ProQues, Web.

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