Design of wireless power transfer system via magnetic resonant coupling at 13.56 m hz

Design of Wireless Power Transfer System via Magnetic Resonant

Coupling at 13.56MHz

Ajay Kumar Sah

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Introduction

Power

Wireless Power transmission (WPT)

Magnetic induction

Resonant coupling

Maximum power transfer

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Types Of WPT Techniques

On the basis of Distance:

Near field Mid field Far field

On the basis of mode of Coupling:

Inductive Capacitive Laser Microwave

Application:Implantable medical devicessmart cards and electric vehiclemobile electronicsAnd many more..

4

Objective

To design an improved WPT system

IOE – Graduate Conference , 29th November 2013, Central Campus , Pulchowk

Block diagram of the system

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Methodology

Rectifier Design I/p & o/p on PSPICE

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Methodology (Contd…)

Designed H Bridge Amplifier/Oscillator

O/p of H-bridge Amplifier/Oscillator

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Antenna System Design

The classic formula for single-layer inductance (air core) is called Wheeler's formula is given as:

Where,L = inductance in micro HenriesN= number of turns of wireR= radius of coil in cmH= height of coil in cm Coil antenna

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Parameters of designed antenna

Coil (antenna)

N(turns) R(cm) H(cm) L(uH) F(MHz) C(Pf)

Power 2 5 3.3 0.5 13.56 278.518

Tx 3 6 4.4 13 13.56 105.968

Rx 1.67 6 4.4 0.4 13.56 344.398

Load 1 3.7 2 0.1 13.56 1.377 nf

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Equivalent circuit of WPT system on ADS

Simulation set up of WPT system on ADS

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S-parameters of WPT System

Simulation result showing │S11│ and │S21│

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Power Transfer Efficiency of WPT System

Simulation set up for Power transfer efficiency

Power transfer efficiency of WPT systemIOE – Graduate Conference , 29th November 2013, Central Campus , Pulchowk

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S parameters at variable k

Simulation result showing│S21│ at different k IOE – Graduate Conference , 29th November 2013, Central Campus , Pulchowk

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Comparison of all three WPT Systems

Simulation result showing │S11│ and │S21Systems k │S11│ │S21│ Efficiency

2 coil system 0.5 0.929 0.367 13.46%

3 coil system 0.5 0.667 0.743 55.20%

Designed system 0.00429 0.012 0.884 78.18%

Table: Efficiency of Two coil, three coil and designed WPT SystemIOE – Graduate Conference , 29th November 2013, Central Campus , Pulchowk

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Advantages

Wire-freeDoes not need LOSNo radiationDoes not interfere with radio waves.Very useful in biological implants.Highly resonant strong coupling provides high

efficiency over distance.

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Conclusion

An improved WPT system was designed. Efficiency 78.18% at k=0.00429. Significant improvements in terms of power-

transfer efficiency have been achieved.

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References

1. Sabuj Das Gupta, Md. Shahinur Islam, Kawser Md. Nuronnabi, Mohammad Sakib Hossain, Md. Zahid Hasan - Design & Implementation of Cost Effective Wireless Power Transmission Model: GOOD BYE Wires – published at: “International Journal of Scientific and Research Publications(IJSRP), Volume 2, Issue 12, December 2012 Edition” .

2. William C. Brown, "The history of wireless power transmission," Solar Energy, vol.56, no.1, pp. 3-21, January 1996

3. Sanghoon Cheon, Yong-Hae Kim, Seung-Youl Kang, Myung Lae Lee, and Taehyoung Zyung “Wireless Energy Transfer System with Multiple Coils via Coupled Magnetic Resonances” ETRI Journal, Volume 34, Number 4, August 2012

4. Mandip Jung Sibakoti, Professor Derin Sherman and Joey Hambleton “Wireless Power Transmission Using Magnetic Resonance” Cornell College PHY312, December 2011.

5. Kurs, A. Karalis, R. Moffatt, J. D. Joannopoulos, P. Fisher, M. Soijacic, “Wireless Power Transfer via Strongly Coupled Magnetic Resonances”, Massachusetts Institute of Technology, 2007 Science, Vol. 317. no. 5834, pp. 83— 86, June 2007.

6. Kawamura, Atsuo, and Tae-Woong Kim. "Proposed Equivalent Circuit and Parameter Identification Method for Electro-Magnetic Resonance Based Wireless Power Transfer.” April 2013.

7. Hoang, Huy, and Franklin Bien. "Maximizing Efficiency of Electromagnetic Resonance Wireless Power Transmission Systems with Adaptive Circuits."Wireless Power Transfer–Principles and Engineering Explorations: K. Y. Kim, ed., InTech, 2012. Print.

8. Jordan, Edward C., and K. G. Balmain. “Electromagnetic Waves and Radiating Systems”, Second ed. New Dehli: Prentice-Hall of India, August 2006. Print.

9. Nilsson, James William., and Susan A. Riedel. “Electric Circuits”. Boston: Prentice Hall, January 2011. Print.

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Thank You !

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