Dual-phase self-biased magnetoelectric energy harvester

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AIP Publishing

We report a magnetoelectric energy harvester structure that can simultaneously scavenge magnetic and vibration energy in the absence of DC magnetic field. The structure consisted of a piezoelectric macro-fiber composite bonded to a Ni cantilever. Large magnetoelectric coefficient similar to 50 V/cm Oe and power density similar to 4.5 mW/cm(3) (1 g acceleration) were observed at the resonance frequency. An additive effect was realized when the harvester operated under dual-phase mode. The increase in voltage output at the first three resonance frequencies under dual-phase mode was found to be 2.4%, 35.5%, and 360.7%. These results present significant advancement toward high energy density multimode energy harvesting system. (C) 2013 AIP Publishing LLC.

Wireless electronics, Vibrations, Composite materials, Generators, Physics
Zhou, Yuan; Apo, Daniel J.; Priya, Shashank, "Dual-phase self-biased magnetoelectric energy harvester," Appl. Phys. Lett. 103, 192909 (2013); http://dx.doi.org/10.1063/1.4829151