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Journal of Micro/Nanolithography, MEMS, and MOEMS

Hybrid energy harvester based on piezoelectric and electromagnetic mechanisms
Author(s): Bin Yang; Chengkuo Lee; Wei Loon Kee; Siak-Piang Lim
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Paper Abstract

A novel hybrid energy harvester integrated with piezoelectric and electromagnetic energy harvesting mechanisms is investigated. It contains a piezoelectric cantilever of multilayer piezoelectric transducer (PZT) ceramics, permanent magnets, and substrate of two-layer coils. The effect of the relative position of coils and magnets on the PZT cantilever end and the poling direction of magnets on the output voltage of the energy harvester is explored. When the poling direction of magnets is normal to the coils plane, the coils yield the maximum output voltage, i.e., the type I and III devices. The maximum output voltage and power from the PZT cantilever of the type III device are 0.84 V and 176 µW under the vibrations of 2.5-g acceleration at 310 Hz, respectively. And the maximum output voltage and power from the coils are 0.78 mV and 0.19 µW under the same conditions, respectively. The power density from the type III device is derived as 790 µW/cm3 from piezoelectric components and 0.85 µW/cm3 from electromagnetic elements.

Paper Details

Date Published: 1 April 2010
PDF: 10 pages
J. Micro/Nanolith. MEMS MOEMS 9(2) 023002 doi: 10.1117/1.3373516
Published in: Journal of Micro/Nanolithography, MEMS, and MOEMS Volume 9, Issue 2
Show Author Affiliations
Bin Yang, National Univ. of Singapore (Singapore)
Chengkuo Lee, National Univ. of Singapore (Singapore)
Wei Loon Kee, National Univ. of Singapore (Singapore)
Siak-Piang Lim, National Univ. of Singapore (Singapore)

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