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Wireless Power Transmission

Wireless Power Transmission. By Abner Molina UTA REU Summer 2013 Group: Dr. Chiao Midterm Presentation Date: 7/9/2013. Overview. Experimental Objective Introduction Background Information Materials Procedure Data/Observations Results Conclusion. Experimental Objective .

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Wireless Power Transmission

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  1. Wireless Power Transmission By Abner Molina UTA REU Summer 2013 Group: Dr. Chiao Midterm Presentation Date: 7/9/2013

  2. Overview • Experimental Objective • Introduction • Background Information • Materials • Procedure • Data/Observations • Results • Conclusion

  3. Experimental Objective • Increase efficiency of wireless power being transmitted through: • Different design of antennas (repeaters) • Different circuitry: • Class E amplifier • Phase lock loop (PLL)

  4. Introduction • Done by Peter Woods

  5. 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

  6. Background Information • Designs: • Repeater 1:

  7. Background Information • Repeater 2:

  8. Background InFormation • Repeater 3:

  9. Background Information • Repeater 4, Reciever, Transmitter:

  10. 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

  11. Background Information • Class E Amplifier [2]

  12. Materials • Litz Wire • Antenna Frame • Capacitors • Oscilloscope • Function Generator • DC Power Supply

  13. Procedure • Set Up

  14. Data/Observations (40 cm)

  15. Data/Observations (60 cm)

  16. Data/Observations (80 CM)

  17. Results • 40 CM • Repeater 1 produce higher efficiency • 60 CM • Repeater 1 produce higher efficiency • 80 cm • Repeater 3 produce higher efficiency

  18. 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 Litzwire • Produce more control experiments • Incorporate LABView for precise results

  19. 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, 15-20 Sept. 2012doi: 10.1109/ECCE.2012.6342288 • [2] Tao Wang. “Optimized Class-E RF Power Amplifier Design in Bulk CMOS.” ProQues, 2007. Web.

  20. AnY question?

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