Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Self-powered piezoelectric energy harvesting with ultra-low power consumption for low-amplitude ambient vibrations

  • Osama Younas (Department of Instrument Science and Engineering, Shanghai Jiaotong University) ;
  • Ping Li (School of Electronic, Information and Electrical Engineering, Shanghai Jiaotong University) ;
  • Yumei Wen (School of Electronic, Information and Electrical Engineering, Shanghai Jiaotong University)
  • Received : 2023.04.09
  • Accepted : 2024.01.06
  • Published : 2024.06.20
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Abstract

The consumption of high power and an extended start-up time are some of the major issues faced by piezoelectric energy harvesting. With this in mind, a control circuit with an extremely low power consumption of a few milliwatts is designed in this paper to energize heavy loads like wireless sensor nodes. A low-duty cycled self-powered control circuit, which works only at the maximum power point, is proposed in this paper. During a cold-start, optimum operative conditions can be achieved by this circuit. Moreover, a low power threshold at the input is sufficient to start the circuit. An additional piezoelectric transducer or a DC power supply is not required to operate this designed circuit. In terms of harvesting energy, performance enhanced by 320% can be achieved by this circuit when compared to the standard energy harvesting circuit when connected to a series-synchronized switch harvesting on an inductor (SSHI) with a large storage capacitor of 150 mF. An input power of 4.42 ㎼ is enough for the circuit during cold-start and it consumes an ultra-low power of 0.3 ㎼.

Keywords

Acknowledgement

This paper is supported by the National Key Research and Development Program of China (Grant No. 2022YFB3205703) and National Natural Science Foundation of China (No. 61973217).

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