LOOP SWITCHING TECHNIQUE FOR WIRELESS POWER TRANSFER USING MAGNETIC RESONANCE COUPLING | Zendy

Jungsik Kim | Zendy; Wonseok Choi | Zendy; Jinho Jeong | Zendy

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LOOP SWITCHING TECHNIQUE FOR WIRELESS POWER TRANSFER USING MAGNETIC RESONANCE COUPLING

Author(s) -

Jungsik Kim,

Wonseok Choi,

Jinho Jeong

Publication year - 2013

Publication title -

electromagnetic waves

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.437

H-Index - 89

eISSN - 1559-8985

pISSN - 1070-4698

DOI - 10.2528/pier13012118

Subject(s) - wireless power transfer , transmitter , coupling (piping) , inductive coupling , loop (graph theory) , maximum power transfer theorem , power (physics) , range (aeronautics) , electronic engineering , computer science , topology (electrical circuits) , resonant inductive coupling , wireless , physics , electrical engineering , control theory (sociology) , telecommunications , engineering , channel (broadcasting) , energy transfer , mathematics , combinatorics , quantum mechanics , mechanical engineering , control (management) , artificial intelligence , molecular physics , aerospace engineering

We propose a loop switching technique to improve the e-ciency of wireless power transfer (WPT) systems using magnetic resonance coupling. The proposed system employs several loops with difierent sizes, one of which is connected to the system with various distances between the transmitter and the receiver. It enables the coupling coe-cient to be adjusted with the distance, which allows high e-ciency over a wide range of distances. The proposed system is analyzed using an equivalent circuit model, and electromagnetic (EM) simulation is performed to predict the performance. It is shown from the experimental results at 13.56MHz that the proposed loop switching technique can maintain high e-ciency over a wide range. The e-ciency is measured to be 50% at 100cm, which corresponds to a 46% increase compared to a conventional WPT system without the loop switching technique.

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