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

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Design of Micro-Magnetic Energy Harvest Power Management Circuit for Emergency Lighting LED Driving in Underground Facility for Public Utilities

지하 공동구 비상조명 LED 구동용 초소형 자기 에너지 하베스트 전력관리 회로 설계

  • 심혜령 (경상대학교 전기시스템공학과) ;
  • 이경호 (한국전기연구원) ;
  • 김종현 (한국전기연구원) ;
  • 한석붕 (경상대학교 전기시스템공학과)
  • Received : 2020.05.06
  • Accepted : 2020.06.15
  • Published : 2020.06.30
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Abstract

In this paper, a power management circuit was designed to drive the emergency lighting LED in the underground facility for public utilities using magnetic energy harvest. The magnetic energy harvest consists of a harvest elements and power management circuits. The proposed circuit was made of a rectifier, a battery charging circuit, and an LED driving circuit. In normal times, the battery is charged with the harvested power, and in the event of an emergency, the energy stored in the battery is used to drive the LED. As a result of the measurement, it took two minutes to charge the 47 mF capacitor. This is the amount of power that can drive an LED for emergency lighting for about three and a half minutes. Through this, it was confirmed that the power management circuit for magnetic energy harvest proposed in this paper can be used as an emergency lighting LED-driven power device in an underground facility for public utilities where it is difficult to draw separate power.

본 논문에서는 자기 에너지 하베스트를 이용하여 지하 공동구의 비상조명 LED를 구동하는 전력관리 회로를 설계하였다. 자기 에너지 하베스트는 하베스터 소자와 전력관리 회로로 구성되어 진다. 제안하는 회로는 정류기, 배터리 충전회로와 LED 구동회로로 만들어졌다. 평상시에는 만들어진 전력으로 배터리를 충전하고, 비상시에는 배터리에 충전된 에너지를 이용하여 LED를 구동한다. 측정 결과, 47 mF 커패시터를 충전하는 데 2분이 걸렸다. 이것은 약 3분 30초 동안 비상조명용 LED를 구동할 수 있는 전력량이다. 이를 통해, 본 논문에서 제안하는 자기 에너지 하베스트용 전력관리 회로를 이용하여 별도의 전원을 끌어오기 어려운 지하 공동구의 비상조명 LED 구동용 전원장치로 사용할 수 있는 것을 확인하였다.

Keywords

References

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