An optimized track length in Roadway Inductive Power Transfer Systems

W. Zhang, Siu Chung Wong, Chi Kong Tse, Q. Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review


Application of inductive power transfer (IPT) to electric vehicles moving along the road can provide more charging flexibility with the reduction of weight and size of charge-storage batteries required in the vehicles. Existing research focuses on the efficiency improvement and alignment tolerance of the IPT transformer. Consideration of the transformer track length and the vehicle speed is rarely discussed. In this paper, an IPT vehicle charging system using a series of sectional tracks is studied. The relationship among various key parameters, such as vehicle speed, system efficiency, and power utilization of the IPT system, is studied in detail. Specifically, the impact on efficiency due to variation of track length and edge correction is reported. The extension of the system from a single pickup to multiple pickups is discussed. The results are verified with finite-element-analysis simulation and a scale-down experimental prototype.
Original languageEnglish
Pages (from-to)598-608
Number of pages11
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Issue number3
Publication statusPublished - 2014


  • Couplings
  • Tracking
  • Power electronics
  • Q-factor
  • Optimization
  • Electric vehicles

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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