• Title/Summary/Keyword: Electro-magnetic resonance coupling

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Proposed Equivalent Circuit and Parameter Identification Method for Electro-Magnetic Resonance Based Wireless Power Transfer

  • Kawamura, Atsuo;Kim, Tae-Woong
    • Journal of Electrical Engineering and Technology
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    • v.8 no.4
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    • pp.799-807
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    • 2013
  • The proper equivalent circuit is newly presented for electro-magnetic resonance based wireless power transfer. Based on the proposed equivalent circuit of open-ended helical antennas, the parameter identification of helical antennas can be well derived for highly efficient wireless power transfer. The well-established equivalent circuit in high frequency ranges is developed for analyzing a resonance enhanced-electromagnetic coupling helical antennas and the unknown parameters for helical antennas are identified by experiments. The effectiveness based on the proposed equivalent circuit is verified through experiments.

A Study on the Application of Voltage Transformer at Transmission Lines (송전선로측 권선형 변성기 사용에 따른 기술적 고찰)

  • Choi, Ky-Youl;Park, Moon-Bin
    • Proceedings of the KIEE Conference
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    • 1999.07c
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    • pp.1152-1154
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    • 1999
  • Recently. due to the drastic development of communication method between substations for pilot protective relaying system. The power line carrier(PLC) application is getting obsolete. Consequently, the coupling capacitor voltage transformer (CCVT) loses its necessity for the carrier coupling function, and so wound voltage transformer(VT) can be used to substitute CCVT for voltage signal. However, VT has been reported to give rise to ferro-resonance phenomena, so sufficient consideration on applying the VT to line side is required. This study introduces probable technical problems in using the VT on T/L side, and carries out feasibility study on the basis of modeling results by EMTP(Electro-magnetic transient program)

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