Higher Order Compensation for Inductive-Power-Transfer Converters with Constant-Voltage or Constant-Current Output Combating Transformer Parameter Constraints

Xiaohui Qu, Yanyan Jing, Hongdou Han, Siu Chung Wong, Chi Kong Tse

Research output: Journal article publicationJournal articleAcademic researchpeer-review

111 Citations (Scopus)


Compensation is crucial for improving performance of inductive-power-transfer (IPT) converters. With proper compensation at some specific frequencies, an IPT converter can achieve load-independent constant output voltage or current, near zero reactive power, and soft switching of power switches simultaneously, resulting in simplified control circuitry, reduced component ratings, and improved power conversion efficiency. However, constant output voltage or current depends significantly on parameters of the transformer, which is often space constrained, making the converter design hard to optimize. To free the design from the constraints imposed by the transformer parameters, this paper proposes a family of higher order compensation circuits for IPT converters that achieves any desired constant-voltage or constant-current (CC) output with near zero reactive power and soft switching. Detailed derivation of the compensation method is given for the desired transfer function not constrained by transformer parameters. Prototypes of CC IPT configurations based on a single transformer are constructed to verify the analysis with three different output specifications.
Original languageEnglish
Article number7422134
Pages (from-to)394-405
Number of pages12
JournalIEEE Transactions on Power Electronics
Issue number1
Publication statusPublished - 1 Jan 2017


  • Higher order compensation
  • inductive power transfer (IPT)
  • soft switching
  • zero reactive power

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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