Control design for optimizing efficiency in inductive power transfer systems

Zhicong Huang, Siu Chung Wong, Chi Kong Tse

Research output: Journal article publicationJournal articleAcademic researchpeer-review

140 Citations (Scopus)


Inductive power transfer (IPT) converters are resonant converters that attain optimal energy efficiencies for a certain load range. To achieve maximum efficiency, it is common to cascade the IPT converter with front-side and load-side dc/dc converters. The two dc/dc converters are normally controlled cooperatively for the requirements of output regulation and maximum efficiency tracking using a control technique based on perturbation and observation, which is inevitably slow in response. In this paper, a decoupled control technique is developed. The load-side dc/dc converter is solely responsible for output regulation, while the front-side converter is responsible for impedance-matching of the IPT converter by controlling its input-to-output voltage ratio. The controls are linear and therefore fast. DC and small-signal transfer functions are derived for designing the control parameters. The performances of fast regulation and high efficiency of the IPT converter system are verified using a prototype system.
Original languageEnglish
Article number7971993
Pages (from-to)4523-4534
Number of pages12
JournalIEEE Transactions on Power Electronics
Issue number5
Publication statusPublished - 1 May 2018


  • Control for maximum efficiency
  • Inductive power transfer (IPT)
  • Wireless power transfer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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