Ring-type 33-mode piezoelectric energy harvesters (PEHs) were fabricated using Pb(Zr,Ti)O3- and (Na,K)NbO3-based piezoelectric ceramics. The relationship between the output performance of the PEH and the piezoelectric properties of the ceramics was investigated. Ring-type PEHs were selected for this investigation because they can be mounted on a specimen holder at the same position, ensuring structurally reliable output performance. The × Q m/ value, which was reported as a figure of merit (FOM) of the PEH under resonance condition, could not adequately explain the output performances of the 33-mode PEH with a specimen holder much larger than the size of the specimen. The d 33 × g 33 value, which is a FOM derived from the theoretical output power of the 33-mode PEH, can explain the variation of the output power of the 33-mode PEH with a large specimen holder. However, since the variation of the output power was more accurately explained by the d 33 × g 33 × value, this was suggested as a new FOM of the output power of the ring-type 33-mode PEH with a large specimen holder.
Bibliographical noteFunding Information:
This research was supported by the National Research Council of Science & Technology (NST) Grant by the Korean government (MSIP) (No. CAP-17-04-KRISS) and the authors also thank the KU-KIST Graduate School Program of Korea University.
© 2018 IOP Publishing Ltd.
- 33-mode vibration
- figure of merit (FOM)
- piezoelectric energy harvester
- piezoelectric property
ASJC Scopus subject areas
- Signal Processing
- Civil and Structural Engineering
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Electrical and Electronic Engineering