Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Control of Power Distribution for Multiple Receivers in SIMO Wireless Power Transfer System

  • Kim, Gunyoung (Department of Electronics Engineering, Kyung Hee University) ;
  • Boo, Seunghyun (Department of Electronics Engineering, Kyung Hee University) ;
  • Kim, Sanghoek (Department of Electronics Engineering, Kyung Hee University) ;
  • Lee, Bomson (Department of Electronics Engineering, Kyung Hee University)
  • Received : 2018.02.08
  • Accepted : 2018.06.19
  • Published : 2018.10.31
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Abstract

A method to control the power distribution among receivers by the load values in a single-input, multiple-output (SIMO) wireless power transfer (WPT) system is investigated. We first derive the value of loads to maximize total efficiency. Next, a simple, but effective analytical formula of the load condition for the desired power distribution ratio is presented. The derived load solutions are simply given by system figure of merits and desired power ratios. The formula is validated with many numerical examples via electromagnetic simulations. We demonstrate that with the choice of loads from this simple formula, the power can be conveniently and accurately distributed among receivers for most practical requirements in SIMO WPT systems.

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References

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