Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3159815
Keywords
electric generators; electromechanical effects; magnetomechanical effects; piezoelectric devices
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Funding
- AFOSR MURI [F 9550-06-1-0326]
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This letter introduces a piezomagnetoelastic device for substantial enhancement of piezoelectric power generation in vibration energy harvesting. Electromechanical equations describing the nonlinear system are given along with theoretical simulations. Experimental performance of the piezomagnetoelastic generator exhibits qualitative agreement with the theory, yielding large-amplitude periodic oscillations for excitations over a frequency range. Comparisons are presented against the conventional case without magnetic buckling and superiority of the piezomagnetoelastic structure as a broadband electric generator is proven. The piezomagnetoelastic generator results in a 200% increase in the open-circuit voltage amplitude (hence promising an 800% increase in the power amplitude).
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