Precise characteristics analysis of series/series-parallel compensated contactless resonant converter

Jia Hou, Qianhong Chen, Xiaoyong Ren, Xinbo Ruan, Siu Chung Wong, Chi Kong Tse

Research output: Journal article publicationJournal articleAcademic researchpeer-review

74 Citations (Scopus)


The series/series-parallel (S/SP) compensated contactless resonant converter has a desirable feature of being insensitive to variation of parameters including the transformer's coupling coefficient. However, the error resulting from the use of fundamental harmonic approximation is significant, thus complicating the design procedure and affecting the effectiveness of the control. In this paper, a precise characteristics analysis of the S/SP converter is presented. A generalized equivalent circuit of the S/SP resonant tank is derived, and the cause of the waveform distortion is revealed. Then, more accurate expressions for the key variables of the resonant tank and the output voltage gain are given. Finally, a 1.5 kW contactless resonant converter with S/SP compensation is constructed. Experimental results are in good agreement with the calculated results.
Original languageEnglish
Article number6809143
Pages (from-to)101-110
Number of pages10
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Issue number1
Publication statusPublished - 1 Jan 2015


  • Contactless power transmission (CPT)
  • output voltage gain analysis
  • resonant power converter
  • series/series-parallel (S/SP) compensation
  • time-domain analysis

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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