Strategy for enhancing the active harvesting of piezoelectric energy

Kenji Yoshimizu, Yuta Yamamoto, Kei Asahina, Kanjuro Makihara

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This article proposes new methods for enhancing the active harvest of piezoelectric energy using the synchronized switch harvesting on inductor (SSHI) technique. It was experimentally confirmed that the energy harvested by the original synchronized switch harvesting on inductor technique was decreased by the suppression of the vibration amplitude, and this critical problem was solved by developing new control strategies, namely, switch harvesting considering vibration suppression (SCVS) and adaptive SCVS (ASCVS). The SCVS technique was designed to intentionally skip some of the switching actions of the original synchronized switch harvesting on inductor technique, while the ASCVS technique enables more flexible variation of the number of skipped switching actions. The skipping of the switching actions facilitates the recovery of the vibration amplitude produced by the excitation force, and the developed strategies thus maintain the vibration amplitude at the highest possible level, resulting in increased energy harvest. The results of the experimental implementation of the proposed strategies showed that they enabled the harvesting of as much as 10.5 times the energy harvested by the original synchronized switch harvesting on inductor technique. The ASCVS technique particularly enables flexible enhancement of the harvested energy under various vibration conditions.

Original languageEnglish
Pages (from-to)1059-1070
Number of pages12
JournalJournal of Intelligent Material Systems and Structures
Volume28
Issue number8
DOIs
Publication statusPublished - 2017 May 1

Keywords

  • Energy harvesting
  • piezoelectric
  • switch control
  • synchronized switch harvesting on inductor (SSHI)
  • vibration

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering

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