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Segmented impact-type piezoelectric energy harvester for self-start impedance matching circuit

Title
Segmented impact-type piezoelectric energy harvester for self-start impedance matching circuit
Author
유홍희
Keywords
piezoelectric energy harvester; self-start; micro wind energy; power management circuit
Issue Date
2018-09
Publisher
IOP PUBLISHING LTD
Citation
SMART MATERIALS AND STRUCTURES, v. 27, no. 11, Article no. 114006
Abstract
This paper proposes a segmented impact-type piezoelectric energy harvester (PEH) for self-start impedance matching circuit. Generally, an oscillator in an impedance matching circuit requires a separate power supply. Considering randomness and intermittence of wind energy, a design of a smart power controller is essential for efficient and timely power supply to the oscillator. The proposed segmented impact-type PEH is designed to achieve an ultra-low power consumption for an impedance matching circuit operation. The proposed harvester consists of a main piezoelectric material (PZT1) to power the main application such as wireless sensor node, and a sub-piezoelectric material (PZT2) to power the impedance matching circuit. The size of PZT2 is determined to meet the power requirement of the impedance matching circuit, and the self-start circuit is proposed to supply the power from PZT2 to the impedance matching circuit. Experimental results indicate that the proposed self-start circuit with PZT2 successfully operates the impedance matching circuit with extremely low power consumption of 45 mu W, which is 30%-70% compared to the existing impact-type PEH circuits.
URI
https://iopscience.iop.org/article/10.1088/1361-665X/aacdc6https://repository.hanyang.ac.kr/handle/20.500.11754/119928
ISSN
0964-1726; 1361-665X
DOI
10.1088/1361-665X/aacdc6
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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