The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Magnetic Beamforming for Optimum Efficiency Wireless Power Transfer

최적 효율 무선 전력 전송을 위한 Magnetic Beam 형성

  • Received : 2019.12.10
  • Accepted : 2020.02.15
  • Published : 2020.02.29
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Abstract

Wireless power transfer is more convenient than wired power transfer, but has a shorter transfer distance and lower efficiency. In addition, it is difficult to charge multiple devices simultaneously. In this paper, we propose a method of magnetic beam forming by using multiple transmitters in order to increase transfer distance and improve efficiency of wireless power transfer. To do this, the relationship between the transmitter coil current and magnetic field at the center of receiver coil is modelled, and calculate the optimal transmitter coil current using the characteristics of the pseudoinverse. Finally, the validity of the proposed method is verified by simulation.

무선 전력 전송은 유선 전력 전송 보다 편리하지만 전송거리가 짧고 효율이 낮다. 또한, 여러 장치를 동시에 충전하기 어렵다. 본 논문에서는 무선 전력 전송의 전송 거리를 증가시키고 효율을 향상시키기 위해 다수의 송신코일을 이용해서 Magnetic Beam을 형성하는 방법을 제안한다. 이를 위해 송신코일 전류와 수신코일 중심에서의 자속밀도 사이의 관계를 모델링하고, 의사역행렬(Pseudoinverse)의 특성을 이용해 최적의 송신코일 전류를 계산한다. 마지막으로 Simulation을 통해 제안한 방법의 타당성을 검증한다.

Keywords

References

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