Design for efficiency optimization and voltage controllability of series-series compensated inductive power transfer systems

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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

370 Citations (Scopus)


Inductive power transfer (IPT) is an emerging technology that may create new possibilities for wireless power charging and transfer applications. However, the rather complex control method and low efficiency remain the key obstructing factors for general deployment. In a regularly compensated IPT circuit, high efficiency and controllability of the voltage transfer function are always conflicting requirements under varying load conditions. In this paper, the relationships among compensation parameters, circuit efficiency, voltage transfer function, and conduction angle of the input current relative to the input voltage are studied. A design and optimization method is proposed to achieve a better overall efficiency as well as good output voltage controllability. An IPT system design procedure is illustrated with design curves to achieve a desirable voltage transfer ratio, optimizing between efficiency enhancement and current rating of the switches. The analysis is supported with experimental results.
Original languageEnglish
Article number6471242
Pages (from-to)191-200
Number of pages10
JournalIEEE Transactions on Power Electronics
Issue number1
Publication statusPublished - 1 Jan 2014


  • Inductive power transfer (IPT)
  • loosely coupled transformer
  • resonance power converter
  • series-series compensation
  • voltage transfer function

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this