Evaluation of power transfer efficiency with ferrite sheets in WPT system

Tae Hyung Kim, Sehwa Yoon, Jong Gwan Yook, Gi Ho Yun, Woong Yong Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

20 Citations (Scopus)


Proper selection of magnetic material is very important to maximize the power transfer efficiency (PTE) in case of the conductor in the receiving coil. The effects of the relative permeability and loss tangent of the magnetic material are investigated. A relatively low complex permeability ensures a high efficiency in wireless power transfer system (WPT) at 6.78 MHz. To maximize the PTE, the properties of the selected ferrite sheet should include a relative permeability higher than 200, a thickness of 600 um, and a loss tangent less than 0.01. Although 2-layer ferrite sheets show lower PTE than those of complex of complex of ferrite sheets, they have relatively high permeabilities and low core losses, which are beneficial in e real environments.

Original languageEnglish
Title of host publicationWPTC 2017 - Wireless Power Transfer Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509045853
Publication statusPublished - 2017 Jun 19
Event2017 Wireless Power Transfer Conference, WPTC 2017 - Taipei, Taiwan, Province of China
Duration: 2017 May 102017 May 12

Publication series

NameWPTC 2017 - Wireless Power Transfer Conference


Other2017 Wireless Power Transfer Conference, WPTC 2017
Country/TerritoryTaiwan, Province of China

Bibliographical note

Funding Information:
This work was supported by Korea Evaluation Institute of Industrial Technology (KEIT) Research Grant of 2017 (10047815)

Publisher Copyright:
© 2017 IEEE.

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology


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