Lagrangian derivation and analysis of a simple equivalent circuit model of wireless power transfer system with dual transmitting resonators

Takahiro Koyama, Toru Honjo, Kazuhiro Umetani, Eiji Hiraki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

This paper proposes a novel analysis method for the dual transmitting resonators wireless power transfer (DTR-WPT) system. The DTR-WPT is attractive for its higher efficiency and greater power transfer capability compared with the conventional single transmitting resonator wireless power transfer (STR-WPT) system. However, analytical understanding of the DTR-WPT is difficult due to its complicated operating principle caused by two transmitting resonators and a receiving resonator, which are all magnetically coupled each other. Therefore, practical applications of the DTR-WPT may be hindered by difficulty in establishing a design optimization method and a control scheme. This difficulty is addressed in this paper by proposing a novel simple equivalent circuit model of the DTR-WPT. Lagrangian dynamics is employed to derive this model. Brief analysis of this model showed improvement in the efficiency and the power transfer capability by the DTR-WPT compared with the conventional STR-WPT. In addition, the power transfer of the DTR-WPT system was found to be expressed by the same equivalent circuit model as the STR-WPT system. Therefore, similar design optimization methods and similar control schemes as for the STR-WPT are applicable to the DTR-WPT. Along with the theory, this paper presents experiments that verified appropriateness of the proposed model as well as the analysis results based on this model.

Original languageEnglish
Title of host publication2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9789075815245
DOIs
Publication statusPublished - Oct 25 2016
Event18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe - Karlsruhe, Germany
Duration: Sep 5 2016Sep 9 2016

Other

Other18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe
CountryGermany
CityKarlsruhe
Period9/5/169/9/16

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Keywords

  • Efficiency
  • Modelling
  • Wireless power transmission

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Koyama, T., Honjo, T., Umetani, K., & Hiraki, E. (2016). Lagrangian derivation and analysis of a simple equivalent circuit model of wireless power transfer system with dual transmitting resonators. In 2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe [7695439] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EPE.2016.7695439