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Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Design of an Energy Harvesting Circuit Using Solar and Vibration Energy with MPPT Control

MPPT 제어기능을 갖는 빛과 진동 에너지를 이용한 에너지 하베스팅 회로 설계

  • Yoon, Eun-Jung (Dept. of Electronics Engineering, University of Incheon) ;
  • Hwang, In-Ho (Dept. of Electronics Engineering, University of Incheon) ;
  • Park, Jong-Tae (Dept. of Electronics Engineering, University of Incheon) ;
  • Yu, Chong-Gun (Dept. of Electronics Engineering, University of Incheon)
  • Received : 2012.07.12
  • Accepted : 2012.09.10
  • Published : 2012.09.30
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Abstract

This paper describes an energy harvesting circuit using solar and vibration energy with MPPT(Maximum Power Point Tracking) control for micro sensor nodes. The designed circuit employs MPPT control to harvest maximum power available from a PZT vibration element and an integrated solar cell. The harvested energies are simultaneously combined and stored in a storage capacitor, and then managed and transferred into sensor node by PMU(Power Management Unit). MPPT controls are implemented using the linear relationship between the open-circuit voltage of an energy transducer and its MPP(Maximum Power Point) voltage. The proposed circuit is designed in a CMOS 0.18um technology and its functionality has been verified through extensive simulations. The designed energy harvesting circuit and integrated solar cell occupy $2.85mm^2$ and $8mm^2$ respectively.

본 논문에서는 초소형 센서노드를 위한 MPPT(Maximum Power Point Tracking) 제어기능을 갖는 빛과 진동 에너지를 이용한 에너지 하베스팅 회로를 설계하였다. 설계된 회로는 MPPT 제어를 통해 온칩 솔라 셀과 압전소자로부터 최대 가용 전력을 수확하고, 수확된 에너지를 저장 커패시터에 병합하여 저장한다. 병합된 에너지는 PMU(Power Management Unit)를 통해 센서노드로 공급된다. MPPT 제어는 변환소자의 개방전압과 MPP 전압간의 비례관계를 이용하여 구현하였다. 제안된 회로는 0.18um CMOS 공정으로 설계하였으며, 모의실험을 통해 동작을 검증하였다. 설계된 에너지 하베스팅 회로와 온칩 솔라 셀의 칩 면적은 각각 $2.85mm^2$와 $8mm^2$이다.

Keywords

References

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