期刊
SMART MATERIALS AND STRUCTURES
卷 26, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-665X/aa8d44
关键词
piezoelectric; energy harvesting; synchronized switch; nonlinear circuit
资金
- Agence Nationale de la Recherche, France [ANR-15CE22-0015-01]
- Ministry of Science and Technology, Taiwan [105-2923-E-002-006-MY3]
This paper aims at proposing an electrical interface taking advantage of nonlinear treatment for both significantly increasing the voltage of a piezoelectric device and extracting the corresponding electrostatic energy in an independent way from the connected electrical load. The principles of the proposed system lies in quickly inverting the piezoelectric voltage on each extremum (synchronized switch on inductor operations) for a given number of extremum occurrences, and then extracting the total electrostatic energy available on the piezoelectric element through the so-called synchronous electric charge extraction (SECE) for energy harvesting purpose. Compared to classical SECE approach, which consists in extracting the energy on each voltage extremum occurrence, the proposed scheme shows a significant improvement in low-coupled systems thanks to a fine control of the trade-off between voltage amplification and number of extraction events.
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