Hybrid energy harvester based on piezoelectric and electromagnetic mechanisms

Bin Yang
2010 Journal of Micro/Nanolithography  
A novel hybrid energy harvester integrated with piezoelectric and electromagnetic energy harvesting mechanisms is investigated. It contains a piezoelectric cantilever of multilayer piezoelectric transducer ͑PZT͒ 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
more » ... 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 W 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 W under the same conditions, respectively. The power density from the type III device is derived as 790 W/cm 3 from piezoelectric components and 0.85 W/cm 3 from electromagnetic elements. Downloaded from SPIE Digital Library on 09 Apr 2010 to 137.132.123.69. Terms of Use: http://spiedl.org/terms Yang et al.: Hybrid energy harvester based on piezoelectric and electromagnetic mechanisms J. Micro/Nanolith. MEMS MOEMS Apr-Jun 2010/Vol. 9͑2͒ 023002-2 Downloaded from SPIE Digital Library on 09 Apr 2010 to 137.132.123.69. Terms of Use: http://spiedl.org/terms
doi:10.1117/1.3373516 fatcat:bbwfkqmomzbd7esf7h4jwtfm7q