The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Analysis of Inductive Power Transfer System According to Layer Structure of Transceiver Coil

자기유도방식 무선전력전송 시스템 송수신 코일 Layer 구조에 따른 특성 분석

  • Kim, Cheol-Min (Dept. of Electrical Engineering, Daejin University) ;
  • Yoo, Jae-Gon (Dept. of Electrical Engineering, Daejin University) ;
  • Kim, Jong-Soo (Dept. of Electrical Engineering, Daejin University)
  • Received : 2018.10.11
  • Accepted : 2018.11.16
  • Published : 2019.04.20
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Abstract

In this study, we analyze the structure of the transceiver coil in the inductive power transfer (IPT) system. In the IPT system, the transceiver coil design needs to have the highest magnetic coupling possible because of the relatively low magnetic coupling due to the large gap of distance without the core. The transmitting coil may be formed as a multi-layer type according to the distance between the transmitting and receiving coils if the receiving coil is configured as a multi-layer type on the inner structure of the receiving apparatus, thereby improving the magnetic coupling and system efficiency. We compare and analyze the coil magnetic coupling, and system efficiency according to the layer structure of the transmitting and receiving coils and verify the analysis by JMAG simulation. Experimental results show that the layer structure of the transceiver should be considered according to the inner space of the receiving device and the spacing distance.

Keywords

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Fig. 1. Circuit diagram of IPT system.

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Fig. 2. Various structure of transceiver coils.

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Fig. 3. Magnetic flux density according to coil structure.

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Fig. 4. Experimental environment of IPT system.

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Fig. 5. Distance measurement between coils.

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Fig. 6. Coupling coefficient vs distance (a)∼(d), System efficiency vs distance (e)∼(h).

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Fig. 7. Coupling coefficient vs distance (a)∼(d), System efficiency vs distance (e)∼(h).

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Fig. 8. Key Waveform of IPT system.

TABLE I NUMBER OF TURNS EACH COIL

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TABLE II IPT SYSTEM DESIGN PARAMETERS

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