An Improved Tunable Piezoelectric Energy Harvesting Structure Based on d33 Mode Coupling

Abstract:

This research proposes an improved tunable piezoelectric harvester structure which is constructed by a cantilever base beam and piezoelectric elements working in d33 mode. Our previous work on tunable piezoelectric harvester structure showed a frequency variation ratio of 3.17% with piezoelectric elements working in d31mode coupling. In this work, by changing the working mode of the piezoelectric elements from d31 to d33 mode, the frequency variation ratio was shown to be much higher. Theoretical analysis of the improved structure was investigated and verified with simulations. The results showed that the d33 mode coupling surpasses the d31 mode coupling with a frequency variation ratio of 29.74%.

• Periodical: Advanced Materials Research (Volumes 1092-1093)
• Pages: 136-140
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1092-1093.136
• Online since: March 2015
• Authors: Yang Zhao, Kun Peng Wang, Ying Tai Li, Ming Jie Guan*
• Keywords: Cantilever Beam, Energy Harvesting, Piezoelectric, Resonant Frequency, Tunable

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