Articles

Hybrid energy harvester based on piezoelectric and electromagnetic mechanisms

[+] Author Affiliations
Bin Yang

National University of Singapore, Department of Electrical and Computer Engineering, 4 Engineering Drive 3, Singapore 117576

Chengkuo Lee

National University of Singapore, Department of Electrical and Computer Engineering, 4 Engineering Drive 3, Singapore 117576

Wei Loon Kee, Siak Piang Lim

National University of Singapore, Department of Mechanical Engineering, 9 Engineering Drive 1, Singapore 117576

J. Micro/Nanolith. MEMS MOEMS. 9(2), 023002 (April 02, 2010). doi:10.1117/1.3373516
History: Received July 15, 2009; Revised December 15, 2009; Accepted February 12, 2010; Published April 02, 2010; Online April 02, 2010
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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 0.84V and 176μW under the vibrations of 2.5-g acceleration at 310Hz, respectively. And the maximum output voltage and power from the coils are 0.78mV and 0.19μW under the same conditions, respectively. The power density from the type III device is derived as 790μWcm3 from piezoelectric components and 0.85μWcm3 from electromagnetic elements.

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© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Bin Yang ; Chengkuo Lee ; Wei Loon Kee and Siak Piang Lim
"Hybrid energy harvester based on piezoelectric and electromagnetic mechanisms", J. Micro/Nanolith. MEMS MOEMS. 9(2), 023002 (April 02, 2010). ; http://dx.doi.org/10.1117/1.3373516


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