Performance enhancement of elastic-spring-supported piezoelectric cantilever generator by a 2-degree-of-freedom system

Chang Il Kim, Yong Ho Jang, Young Hun Jeong, Young Jin Lee, Jeong Ho Cho, Jong Hoo Paik, Sahn Nahm

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A piezoelectric cantilever generator using elastic springs as a supporting mechanism was fabricated for vibration-based energy harvester application. The optimum load resistance of 82 kω was selected to obtain the most effective output power. Two strong power peaks for the generator were obtained, being as high as 3.8 and 5.7mW for frequencies of 68 and 79 Hz, respectively. This implies that the generator is controlled by a 2 degree-of-freedom system, which can induce a wide resonance frequency bandwidth. Therefore, the performance of the piezoelectric cantilever generator can be enhanced with the aid of the elastic spring for broadband energy harvesting.

Original languageEnglish
Article number037101
JournalApplied Physics Express
Issue number3
Publication statusPublished - 2012 Mar 1


ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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