Capacitive Power Transfer System with a Mixed-Resonant Topology for Constant-Current Multiple-Pickup Applications

Yu Gang Su, Shi Yun Xie, Aiguo Patrick Hu, Chun Sen Tang, Wei Zhou, Liang Huang

Research output: Journal PublicationArticlepeer-review

63 Citations (Scopus)


Capacitive power transfer (CPT) systems based on high-frequency electric field coupling have attracted much attention recently due to their simplicity and low eddy-current losses. This paper proposes a mixed-resonant topology consisted of a Π-CLC resonant circuit on the primary side and a T-CLC circuit on the secondary side for multiple pickups constant current output applications. The voltage gain, current gain, and zero phase angle frequency at different operating modes of Π-CLC and T-CLC circuits are analyzed by fundamental frequency approximation, and the conditions leading to a constant output current independent of loads are determined. Based on the analysis, a design method to determine the resonant network parameters is proposed according to the required output current of each pickup. A prototype with three pickups has been designed and built, and both simulation and experimental results have demonstrated that the proposed multiple-pickup CPT system can output a constant current at each operating power pickup against the load variations of itself and others.

Original languageEnglish
Article number7784779
Pages (from-to)8778-8786
Number of pages9
JournalIEEE Transactions on Power Electronics
Issue number11
Publication statusPublished - Nov 2017
Externally publishedYes


  • Capacitive power transfer (CPT)
  • mixed-resonant topology
  • multiple pickups
  • parameter design method

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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