Analysis and comparison of secondary series-and parallel-compensated inductive power transfer systems operating for optimal efficiency and load-independent voltage-transfer ratio

Wei Zhang, Siu Chung Wong, Chi Kong Tse, Qianhong Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

240 Citations (Scopus)


Secondary series-and parallel-compensations are widely used in inductive power transfer (IPT) systems for various applications. These compensations are often studied under some isolated constraints of maximum power transfer, optimal efficiency at a particular loading condition, etc. These constraints constitute an insufficient set of requirements for engineers to select appropriate compensation techniques to be used as a voltage converter with optimal efficiency and loading conditions. This paper studies the characteristics of the IPT system at various frequencies of operation utilizing the two compensation techniques to work as a voltage converter. The frequencies that can provide maximum efficiency of operation and load-independent voltage-transfer ratio are analyzed. The optimal frequencies corresponding to the two compensation techniques are found and compared to facilitate the design of voltage converters with efficient power conversion and load-independent frequency of operation. The analysis is supported by experimental measurements.
Original languageEnglish
Article number6558867
Pages (from-to)2979-2990
Number of pages12
JournalIEEE Transactions on Power Electronics
Issue number6
Publication statusPublished - 1 Jun 2014


  • Inductive power transfer
  • loosely coupled transformer
  • resonance power converter
  • series-parallel compensation
  • series-series compensation
  • voltage-transfer function

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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