Modeling and Design of Contactless Sliprings for Rotary Applications

Guangming He, Qianhong Chen, Xiaoyong Ren, Siu Chung Wong, Zhiliang Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)


Contactless sliprings (CS) based on inductive power transfer (IPT) offer a safe and reliable power transfer solution for rotary applications. An accurate reluctance model for CS is presented in this paper along with the associated parameters identification, considering the partially linking effect of the magnetic flux. Aiming to obtain higher coupling coefficient and lighter weight, a design optimization for CS is also proposed by defining a new design parameter 'ζ.' Both simulations and experimental measurements are presented to verify the effectiveness of the proposed modeling method. The maximum errors (between the identified results and the measured results) of the mutual inductance, the leakage inductance, and the coupling coefficient are 8.72%, 7.12%, and 5.98%, respectively, when the gap is less than the core window width. Comparative studies among different modeling methods are carried out, which testify that the proposed method has the highest accuracy. Finally, a 1.5 kW IPT system employing the designed CS is fabricated for verification.

Original languageEnglish
Article number8424179
Pages (from-to)4130-4140
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Issue number5
Publication statusPublished - May 2019


  • Contactless sliprings (CS)
  • inductive power transfer (IPT)
  • modeling
  • parameter identification

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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