Design and Implementation of a Highly Efficient Wireless Power Transfer System Using Magnetic Spiral Resonant Coupling

Document Type : Original Article

Authors

1 Department of electrical engineering /iIslamic Azad university/central tehran branch

2 School of Engineering Science, College of Engineering, University of Tehran

Abstract

Non-radiative wireless power transfer systems based on magnetic resonant coupling have received the attention of many researchers, due to their high efficiency over distances greater than the diameter of their coils and their mid- range of operations. In this article, the design and implementation of a 4-wireless power transmission system consisting of a power coil (drive loop), a transmitting coil (Tx coil), a receiving coil (Rx coil) and a load coil (load loop) is presented. Power is transmitted when the frequency of the E class amplifier is equal to the self-resonant frequency of the transceiver coils. The purpose of this paper is to achieve the highest efficiency without designing an additional impedance matching system. This condition is achieved by varying the coupling factor between the power coil (load) and the two resonators. The maximum efficiency is 93% at 15 cm and using this method results in efficiency improvements of 56.3% and 35.6% at the distances of 60 cm and 100 cm respectively, compared to the case of the coils being fixed.

Keywords

References

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Applied Electromagnetics
Volume 8, Issue 2 - Serial Number 21
December 2021
Pages 17-23

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History

  • Receive Date: 11 January 2020
  • Revise Date: 23 August 2020
  • Accept Date: 27 April 2020

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