Real-time maximum efficiency control in dynamic wireless power transfer system

Daita Kobayashi, Takehiro Imura, Yoichi Hori

Research output: Contribution to journalArticle

5 Citations (Scopus)


Transmitting efficiency is one of the most important characteristics in dynamic wireless power transfer for electric vehicles. In this paper, a simple and efficient topology for a transmitting system called the DC bus system is introduced.Its simplicity maximizes the potential transmitting efficiency. Moreover, a receiving circuit topology and a maximum efficiency control, which is a method to maximize the transmitting efficiency by controlling the secondary voltage, are proposed. A real-time coupling coefficient estimation method is necessary to calculate the secondary voltage command for the control. A simulation and experimental evaluation of the maximum efficiency control was performed using an experimental setup. The results indicate that it provides a large improvement in efficiency and its implementation in a real dynamic power transfer system for electric vehicles is feasible.

Original languageEnglish
Pages (from-to)425-432
Number of pages8
JournalIEEJ Transactions on Industry Applications
Issue number6
Publication statusPublished - 1 Jan 2016



  • Coupling coefficient estimation
  • Dynamic wireless power transfer
  • Electric vehicle
  • Magnetic resonance coupling
  • Maximum efficiency control

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